1. Python/JES JES IDE (Integrated Development Environment)
Incorporates editing environment
Program pane
Command pane
Watcher button to view debugging

2. Image Processing Negative B/WReduce Red Sunset Posterize Redeye
Sepia-tone
Mirror
Symmetry
Background substitution – chromakey
Edge Detection
Rotate
Scale up or down a picture

3. Picture Functions in JES
Picture-level: pick a file and make a picture
= makePicture(pickAFile())
Pixel-level: pick a pixel in a picture
= . getPixel(x.y)
Do operation on a pixel, propagating the same operation over the entire picture

4. Pixel operations Find out what RGB values are
.getRed(), getGreen(), .getBlue()
Change to a new colors
.setRed(255), .setGreen(0) .setBlue(125)
Create a new color in (R,G,B) and set new color
= makeColor(0,255,0)
.setColor( )
= .getColor()
= pickAColor()

5. 2. Get Picture Dimension pWid = myPic.getWidth()
pHgt = myPic.getHeight()

6. Example >>> pic = makePicture(pickAFile())
>>> pix = pic.getPixel(1,1)
>>> print pix
Pixel, color=color r=168 g=131 b=105
# get/set individual color values
>>> print pix.getRed()
168
>>> pix.setRed(255)
255
>>> color=pix.getColor()
>>> print(color)
color r=255 g=131 b=105
>>> pix.setColor(color)

7. LAB_1026 Pick a file and convert it to a picture file
Change colors of 10 pixels at (20,50), (21,50), … (29,50) to reds.
Write a function, hrz10(pic), to draw a red horizontal line from (20,50),…,(29,50) in the picture file, pic (or any name). You have to use a ‘for’ loop.
Write a function, hrz100(pic,x,y), to draw a red horizontal line from (x,y) for 100 pixels.
Write a function, diag(pic,x,y,n), to draw a red diagonal line from (x,y) for n pixels.