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Image Operations Copyright © Software Carpentry 2010 This work is licensed under the Creative Commons Attribution License See http://software-carpentry.org/license.html for more information. Multimedia Programming
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Image Operations Most operations built into the library
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Multimedia ProgrammingImage Operations Most operations built into the library import sys from PIL import Image, ImageFilter filename = sys.argv[1] p = Image.open(filename) p.filter(ImageFilter.BLUR).save('blur-' + filename) p.filter(ImageFilter.CONTOUR).save('contour-' + filename) p.filter(ImageFilter.EMBOSS).save('emboss-' + filename) p.transpose(Image.FLIP_LEFT_RIGHT).save('flip-' + filename)
![Multimedia ProgrammingImage Operations Most operations built into the library import sys from PIL import Image, ImageFilter filename = sys.argv[1] p = Image.open(filename) p.filter(ImageFilter.BLUR).save( blur- + filename) p.filter(ImageFilter.CONTOUR).save( contour- + filename) p.filter(ImageFilter.EMBOSS).save( emboss- + filename) p.transpose(Image.FLIP_LEFT_RIGHT).save( flip- + filename)](http://images.slideplayer.com./30/9553480/slides/slide_3.jpg "Multimedia ProgrammingImage Operations Most operations built into the library import sys from PIL import Image, ImageFilter filename = sys.argv[1] p = Image.open(filename) p.filter(ImageFilter.BLUR).save( blur- + filename) p.filter(ImageFilter.CONTOUR).save( contour- + filename) p.filter(ImageFilter.EMBOSS).save( emboss- + filename) p.transpose(Image.FLIP_LEFT_RIGHT).save( flip- + filename)")
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Multimedia ProgrammingImage Operations blur emboss contour flip
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Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates
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Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new('RGB', (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])
![Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new( RGB , (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])](http://images.slideplayer.com./30/9553480/slides/slide_6.jpg "Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new( RGB , (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])")
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Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new('RGB', (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])
![Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new( RGB , (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])](http://images.slideplayer.com./30/9553480/slides/slide_7.jpg "Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new( RGB , (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])")
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Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new('RGB', (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])
![Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new( RGB , (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])](http://images.slideplayer.com./30/9553480/slides/slide_8.jpg "Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new( RGB , (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])")
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Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new('RGB', (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])
![Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new( RGB , (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])](http://images.slideplayer.com./30/9553480/slides/slide_9.jpg "Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new( RGB , (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])")
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Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new('RGB', (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])
![Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new( RGB , (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])](http://images.slideplayer.com./30/9553480/slides/slide_10.jpg "Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new( RGB , (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])")
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Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new('RGB', (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])
![Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new( RGB , (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])](http://images.slideplayer.com./30/9553480/slides/slide_11.jpg "Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new( RGB , (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])")
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Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new('RGB', (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])
![Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new( RGB , (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])](http://images.slideplayer.com./30/9553480/slides/slide_12.jpg "Multimedia ProgrammingImage Operations Basic image editing is mostly about coordinates original = Image.open(sys.argv[1]) x_size, y_size = original.size x_half, y_half = x_size / 2, y_size / 2 half = original.resize((x_half, y_half)) x_double, y_double = x_size * 2, y_size * 2 double = Image.new( RGB , (x_double, y_double)) for x in range(4): for y in range(4): box = (x * x_half, y * y_half, (x+1) * x_half, (y+1) * y_half) double.paste(half, box) double.save(sys.argv[2])")
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Multimedia ProgrammingImage Operations
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Multimedia ProgrammingImage Operations Draw on images import sys from PIL import Image, ImageDraw BORDER = 10 GRAY = (128, 128, 128) pic = Image.open(sys.argv[1]) xsize, ysize = pic.size draw = ImageDraw.Draw(pic) draw.rectangle((0, 0, xsize, BORDER), fill=GRAY) draw.rectangle((0, 0, BORDER, ysize), fill=GRAY) draw.rectangle((0, ysize-BORDER, xsize, ysize), fill=GRAY) draw.rectangle((xsize-BORDER, 0, xsize, ysize), fill=GRAY) pic.save('border-' + sys.argv[1])
![Multimedia ProgrammingImage Operations Draw on images import sys from PIL import Image, ImageDraw BORDER = 10 GRAY = (128, 128, 128) pic = Image.open(sys.argv[1]) xsize, ysize = pic.size draw = ImageDraw.Draw(pic) draw.rectangle((0, 0, xsize, BORDER), fill=GRAY) draw.rectangle((0, 0, BORDER, ysize), fill=GRAY) draw.rectangle((0, ysize-BORDER, xsize, ysize), fill=GRAY) draw.rectangle((xsize-BORDER, 0, xsize, ysize), fill=GRAY) pic.save( border- + sys.argv[1])](http://images.slideplayer.com./30/9553480/slides/slide_14.jpg "Multimedia ProgrammingImage Operations Draw on images import sys from PIL import Image, ImageDraw BORDER = 10 GRAY = (128, 128, 128) pic = Image.open(sys.argv[1]) xsize, ysize = pic.size draw = ImageDraw.Draw(pic) draw.rectangle((0, 0, xsize, BORDER), fill=GRAY) draw.rectangle((0, 0, BORDER, ysize), fill=GRAY) draw.rectangle((0, ysize-BORDER, xsize, ysize), fill=GRAY) draw.rectangle((xsize-BORDER, 0, xsize, ysize), fill=GRAY) pic.save( border- + sys.argv[1])")
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Multimedia ProgrammingImage Operations Draw on images import sys from PIL import Image, ImageDraw BORDER = 10 GRAY = (128, 128, 128) pic = Image.open(sys.argv[1]) xsize, ysize = pic.size draw = ImageDraw.Draw(pic) draw.rectangle((0, 0, xsize, BORDER), fill=GRAY) draw.rectangle((0, 0, BORDER, ysize), fill=GRAY) draw.rectangle((0, ysize-BORDER, xsize, ysize), fill=GRAY) draw.rectangle((xsize-BORDER, 0, xsize, ysize), fill=GRAY) pic.save('border-' + sys.argv[1])
![Multimedia ProgrammingImage Operations Draw on images import sys from PIL import Image, ImageDraw BORDER = 10 GRAY = (128, 128, 128) pic = Image.open(sys.argv[1]) xsize, ysize = pic.size draw = ImageDraw.Draw(pic) draw.rectangle((0, 0, xsize, BORDER), fill=GRAY) draw.rectangle((0, 0, BORDER, ysize), fill=GRAY) draw.rectangle((0, ysize-BORDER, xsize, ysize), fill=GRAY) draw.rectangle((xsize-BORDER, 0, xsize, ysize), fill=GRAY) pic.save( border- + sys.argv[1])](http://images.slideplayer.com./30/9553480/slides/slide_15.jpg "Multimedia ProgrammingImage Operations Draw on images import sys from PIL import Image, ImageDraw BORDER = 10 GRAY = (128, 128, 128) pic = Image.open(sys.argv[1]) xsize, ysize = pic.size draw = ImageDraw.Draw(pic) draw.rectangle((0, 0, xsize, BORDER), fill=GRAY) draw.rectangle((0, 0, BORDER, ysize), fill=GRAY) draw.rectangle((0, ysize-BORDER, xsize, ysize), fill=GRAY) draw.rectangle((xsize-BORDER, 0, xsize, ysize), fill=GRAY) pic.save( border- + sys.argv[1])")
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Multimedia ProgrammingImage Operations Draw on images import sys from PIL import Image, ImageDraw BORDER = 10 GRAY = (128, 128, 128) pic = Image.open(sys.argv[1]) xsize, ysize = pic.size draw = ImageDraw.Draw(pic) draw.rectangle((0, 0, xsize, BORDER), fill=GRAY) draw.rectangle((0, 0, BORDER, ysize), fill=GRAY) draw.rectangle((0, ysize-BORDER, xsize, ysize), fill=GRAY) draw.rectangle((xsize-BORDER, 0, xsize, ysize), fill=GRAY) pic.save('border-' + sys.argv[1])
![Multimedia ProgrammingImage Operations Draw on images import sys from PIL import Image, ImageDraw BORDER = 10 GRAY = (128, 128, 128) pic = Image.open(sys.argv[1]) xsize, ysize = pic.size draw = ImageDraw.Draw(pic) draw.rectangle((0, 0, xsize, BORDER), fill=GRAY) draw.rectangle((0, 0, BORDER, ysize), fill=GRAY) draw.rectangle((0, ysize-BORDER, xsize, ysize), fill=GRAY) draw.rectangle((xsize-BORDER, 0, xsize, ysize), fill=GRAY) pic.save( border- + sys.argv[1])](http://images.slideplayer.com./30/9553480/slides/slide_16.jpg "Multimedia ProgrammingImage Operations Draw on images import sys from PIL import Image, ImageDraw BORDER = 10 GRAY = (128, 128, 128) pic = Image.open(sys.argv[1]) xsize, ysize = pic.size draw = ImageDraw.Draw(pic) draw.rectangle((0, 0, xsize, BORDER), fill=GRAY) draw.rectangle((0, 0, BORDER, ysize), fill=GRAY) draw.rectangle((0, ysize-BORDER, xsize, ysize), fill=GRAY) draw.rectangle((xsize-BORDER, 0, xsize, ysize), fill=GRAY) pic.save( border- + sys.argv[1])")
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Multimedia ProgrammingImage Operations Draw on images Exercise: put frame around entire image
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Multimedia ProgrammingImage Operations Work with color bands import sys from PIL import Image filename = sys.argv[1] pic = Image.open(filename) pic.load() bands = pic.split() for (i, name) in enumerate('rgb'): bands[i].save(filename.replace('.', '-%s.' % name))
![Multimedia ProgrammingImage Operations Work with color bands import sys from PIL import Image filename = sys.argv[1] pic = Image.open(filename) pic.load() bands = pic.split() for (i, name) in enumerate( rgb ): bands[i].save(filename.replace( . , -%s. % name))](http://images.slideplayer.com./30/9553480/slides/slide_18.jpg "Multimedia ProgrammingImage Operations Work with color bands import sys from PIL import Image filename = sys.argv[1] pic = Image.open(filename) pic.load() bands = pic.split() for (i, name) in enumerate( rgb ): bands[i].save(filename.replace( . , -%s. % name))")
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Multimedia ProgrammingImage Operations Work with color bands import sys from PIL import Image filename = sys.argv[1] pic = Image.open(filename) pic.load() bands = pic.split() for (i, name) in enumerate('rgb'): bands[i].save(filename.replace('.', '-%s.' % name)) (red[], green[], blue[])
![Multimedia ProgrammingImage Operations Work with color bands import sys from PIL import Image filename = sys.argv[1] pic = Image.open(filename) pic.load() bands = pic.split() for (i, name) in enumerate( rgb ): bands[i].save(filename.replace( . , -%s. % name)) (red[], green[], blue[])](http://images.slideplayer.com./30/9553480/slides/slide_19.jpg "Multimedia ProgrammingImage Operations Work with color bands import sys from PIL import Image filename = sys.argv[1] pic = Image.open(filename) pic.load() bands = pic.split() for (i, name) in enumerate( rgb ): bands[i].save(filename.replace( . , -%s. % name)) (red[], green[], blue[])")
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Multimedia ProgrammingImage Operations Work with color bands import sys from PIL import Image filename = sys.argv[1] pic = Image.open(filename) pic.load() bands = pic.split() for (i, name) in enumerate('rgb'): bands[i].save(filename.replace('.', '-%s.' % name)) workaround
![Multimedia ProgrammingImage Operations Work with color bands import sys from PIL import Image filename = sys.argv[1] pic = Image.open(filename) pic.load() bands = pic.split() for (i, name) in enumerate( rgb ): bands[i].save(filename.replace( . , -%s. % name)) workaround](http://images.slideplayer.com./30/9553480/slides/slide_20.jpg "Multimedia ProgrammingImage Operations Work with color bands import sys from PIL import Image filename = sys.argv[1] pic = Image.open(filename) pic.load() bands = pic.split() for (i, name) in enumerate( rgb ): bands[i].save(filename.replace( . , -%s. % name)) workaround")
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Multimedia ProgrammingImage Operations Work with color bands redgreenblue
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Multimedia ProgrammingImage Operations Use point functions to manipulate pixel values R, G, B = 0, 1, 2 SCALE = 0.5 def decrease(x): return x * SCALE pic = Image.open(sys.argv[1]) pic.load() bands = pic.split() bands = (bands[R].point(decrease), bands[G], bands[B]) more_red = Image.merge('RGB', bands) more_red.save('bluegreen-' + sys.argv[1])
![Multimedia ProgrammingImage Operations Use point functions to manipulate pixel values R, G, B = 0, 1, 2 SCALE = 0.5 def decrease(x): return x * SCALE pic = Image.open(sys.argv[1]) pic.load() bands = pic.split() bands = (bands[R].point(decrease), bands[G], bands[B]) more_red = Image.merge( RGB , bands) more_red.save( bluegreen- + sys.argv[1])](http://images.slideplayer.com./30/9553480/slides/slide_22.jpg "Multimedia ProgrammingImage Operations Use point functions to manipulate pixel values R, G, B = 0, 1, 2 SCALE = 0.5 def decrease(x): return x * SCALE pic = Image.open(sys.argv[1]) pic.load() bands = pic.split() bands = (bands[R].point(decrease), bands[G], bands[B]) more_red = Image.merge( RGB , bands) more_red.save( bluegreen- + sys.argv[1])")
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Multimedia ProgrammingImage Operations Work with color bands and point functions R, G, B = 0, 1, 2 SCALE = 0.5 def decrease(x): return x * SCALE pic = Image.open(sys.argv[1]) pic.load() bands = pic.split() bands = (bands[R].point(decrease), bands[G], bands[B]) more_red = Image.merge('RGB', bands) more_red.save('bluegreen-' + sys.argv[1])
![Multimedia ProgrammingImage Operations Work with color bands and point functions R, G, B = 0, 1, 2 SCALE = 0.5 def decrease(x): return x * SCALE pic = Image.open(sys.argv[1]) pic.load() bands = pic.split() bands = (bands[R].point(decrease), bands[G], bands[B]) more_red = Image.merge( RGB , bands) more_red.save( bluegreen- + sys.argv[1])](http://images.slideplayer.com./30/9553480/slides/slide_23.jpg "Multimedia ProgrammingImage Operations Work with color bands and point functions R, G, B = 0, 1, 2 SCALE = 0.5 def decrease(x): return x * SCALE pic = Image.open(sys.argv[1]) pic.load() bands = pic.split() bands = (bands[R].point(decrease), bands[G], bands[B]) more_red = Image.merge( RGB , bands) more_red.save( bluegreen- + sys.argv[1])")
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Multimedia ProgrammingImage Operations Work with color bands and point functions R, G, B = 0, 1, 2 SCALE = 0.5 def decrease(x): return x * SCALE pic = Image.open(sys.argv[1]) pic.load() bands = pic.split() bands = (bands[R].point(decrease), bands[G], bands[B]) more_red = Image.merge('RGB', bands) more_red.save('bluegreen-' + sys.argv[1])
![Multimedia ProgrammingImage Operations Work with color bands and point functions R, G, B = 0, 1, 2 SCALE = 0.5 def decrease(x): return x * SCALE pic = Image.open(sys.argv[1]) pic.load() bands = pic.split() bands = (bands[R].point(decrease), bands[G], bands[B]) more_red = Image.merge( RGB , bands) more_red.save( bluegreen- + sys.argv[1])](http://images.slideplayer.com./30/9553480/slides/slide_24.jpg "Multimedia ProgrammingImage Operations Work with color bands and point functions R, G, B = 0, 1, 2 SCALE = 0.5 def decrease(x): return x * SCALE pic = Image.open(sys.argv[1]) pic.load() bands = pic.split() bands = (bands[R].point(decrease), bands[G], bands[B]) more_red = Image.merge( RGB , bands) more_red.save( bluegreen- + sys.argv[1])")
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Multimedia ProgrammingImage Operations Work with color bands and point functions R, G, B = 0, 1, 2 SCALE = 0.5 def decrease(x): return x * SCALE pic = Image.open(sys.argv[1]) pic.load() bands = pic.split() bands = (bands[R].point(decrease), bands[G], bands[B]) less_red = Image.merge('RGB', bands) less_red.save('bluegreen-' + sys.argv[1])
![Multimedia ProgrammingImage Operations Work with color bands and point functions R, G, B = 0, 1, 2 SCALE = 0.5 def decrease(x): return x * SCALE pic = Image.open(sys.argv[1]) pic.load() bands = pic.split() bands = (bands[R].point(decrease), bands[G], bands[B]) less_red = Image.merge( RGB , bands) less_red.save( bluegreen- + sys.argv[1])](http://images.slideplayer.com./30/9553480/slides/slide_25.jpg "Multimedia ProgrammingImage Operations Work with color bands and point functions R, G, B = 0, 1, 2 SCALE = 0.5 def decrease(x): return x * SCALE pic = Image.open(sys.argv[1]) pic.load() bands = pic.split() bands = (bands[R].point(decrease), bands[G], bands[B]) less_red = Image.merge( RGB , bands) less_red.save( bluegreen- + sys.argv[1])")
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Multimedia ProgrammingImage Operations Less red makes the image look more blue/green
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Multimedia ProgrammingImage Operations Less red makes the image look more blue/green What happens if you increase blue and green instead?
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Multimedia ProgrammingImage Operations Highlight a region in an image
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Multimedia ProgrammingImage Operations Highlight a region in an image Option 1: recolor the pixels
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Multimedia ProgrammingImage Operations Highlight a region in an image Option 1: recolor the pixels Option 2: blend with a square of desired size –New pixel = (left pixel + right pixel) / 2
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Multimedia ProgrammingImage Operations Figure out the coordinates major_x major_y highlight_x highlight_y Low x=(major_x / 2) – (highlight_x / 2) =(major_x – highlight_x) / 2 High x=(major_x / 2) + (highlight_x / 2) =(major_x + highlight_x) / 2
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Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save('higlight-' + major_name)
![Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save( higlight- + major_name)](http://images.slideplayer.com./30/9553480/slides/slide_32.jpg "Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save( higlight- + major_name)")
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Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save('higlight-' + major_name)
![Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save( higlight- + major_name)](http://images.slideplayer.com./30/9553480/slides/slide_33.jpg "Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save( higlight- + major_name)")
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Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save('higlight-' + major_name)
![Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save( higlight- + major_name)](http://images.slideplayer.com./30/9553480/slides/slide_34.jpg "Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save( higlight- + major_name)")
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Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save('higlight-' + major_name)
![Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save( higlight- + major_name)](http://images.slideplayer.com./30/9553480/slides/slide_35.jpg "Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save( higlight- + major_name)")
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Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save('higlight-' + major_name)
![Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save( higlight- + major_name)](http://images.slideplayer.com./30/9553480/slides/slide_36.jpg "Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save( higlight- + major_name)")
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Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save('higlight-' + major_name)
![Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save( higlight- + major_name)](http://images.slideplayer.com./30/9553480/slides/slide_37.jpg "Multimedia ProgrammingImage Operations BLEND = 0.5 major_name, highlight_name = sys.argv[1:3] major, major_x, major_y = get(major_name) highlight, highlight_x, highlight_y = get(highlight_name) box = ((major_x - hl_x) / 2, (major_y - hl_y) / 2, (major_x + hl_x) / 2, (major_y + hl_y) / 2) middle = major.crop(box) middle = Image.blend(middle, highlight, BLEND) major.paste(middle, box) major.save( higlight- + major_name)")
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Multimedia ProgrammingImage Operations PIL provides basic image processing
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Multimedia ProgrammingImage Operations PIL provides basic image processing OpenCV (http://opencv.willowgarage.com) is a complete image processing library
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Multimedia ProgrammingImage Operations PIL provides basic image processing OpenCV (http://opencv.willowgarage.com) is a complete image processing library Have to convert images…
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Multimedia ProgrammingImage Operations PIL provides basic image processing OpenCV (http://opencv.willowgarage.com) is a complete image processing library Have to convert images… …but it's worth it
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November 2010 created by Greg Wilson Copyright © Software Carpentry 2010 This work is licensed under the Creative Commons Attribution License See http://software-carpentry.org/license.html for more information.
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