Photoshop I I450 Technology Seminar

Adobe Photoshop Illustrator Acrobat InDesign ImageReady

This seminar Resolution intro Layers Tools Marquee Paint Brush Move feather Magic Wand Clone Stamp Paint Bucket Gradient

New Image File -> New Set width, height and resolution Leave resolution at 72 pixels/inch unless you need an image with a high resolution Mode RGB (red, green, blue – use for color images) Grayscale (use for black and white) Contents White is you want a blank white image Background Color if you want the same color as background Transparent

Modes Bitmap: uses black and white color values to represent the image. Grayscale: up to 256 shades of gray RGB: red, green and blue dots CMYK: cyan, magenta, yellow and black to create printed colors

Resolution The number of pixels on the screen 640 x x pixels across, 600 pixels tall Standard for 15” monitors 1024 x 768 What happens if you create an image at 800 x 600, and then reset the screen size to 1024 x 768?

Resolution 800 x 600 = 480,000 pixels 1024 x 768 = 786,432 pixels 1280 x 1024 = 1,310,720 pixels The pixels on an 800 x 600 screen are smaller than the pixels on a 1024 x 768 screen

Resolution 1-by-1-inch image with a resolution of 72 ppi contains a total of 5184 pixels (72 pixels wide x 72 pixels high = 5184). File size=16K The same 1-by-1-inch image with a resolution of 300 ppi contains a total of 90,000 pixels. File size=264K

Resolution Bitmaps are resolution dependent Difficult to increase or decrease their size without sacrificing a degree of image quality Reduce the size of a bitmap image through your software's resample or resize command, you throw away pixelsresample Increase the size of a bitmap image through your software's resample or resize command, the software has to create new pixels Creating new pixels, the software must estimate the color values of the new pixels based on the surrounding pixels. This process is called interpolation. interpolation

Scaling vs. Resizing Zooming is scaling Does not effect the image permanently Does NOT change the number of pixels in an image Resizing an image does change the image permanently

Resolution On the web 72 ppi is good For print 72 ppi may be too low 300 ppi for print Can move from high resolution to low Don’t try to move from low resolution to high Keep resolution in mind when creating images in Photoshop!

Samples Program Files > Adobe > Photoshop 7.0 > Samples Open ducky.tif, dune.tif eagle.psd, and flower.psd.psd files are Photoshop Files Contain all the layer and formatting information Very large files

File Browser Upper right part of screen Easy way to open files

Navigator Move the focus of the picture Zoom in and out To zoom in press Crtl and the + button, to zoom out press Crtl and -

Layers Create layers of images on top of each other. This is one of the real strengths of Photoshop. View or hide layer Layer name and details

Layers Minimize everything but the eagle and the flower With the Move Tool (top row, right), drag the eagle on top of the flower You’ve just created an layer (eagle) on top of the flower layer.

History Move backwards all the way to the NEW state of your document Create new document from current state Create new snapshot Delete current state

Tools There are many tools in Photoshop. Under the Window menu you can hide and unhide the ‘toolbox’.

Marquee (selection) Tool Allows you to make selections. Selections can be used for moving, filling, etc. You can always select the Inverse of what you’ve selected by going to Select in the Menu bar and selecting Inverse, after you’ve made a selection

Move Tool Allow you to move things that you have selected. Just select and drag

Magic Wand Selects a group at once.

Fill Tool Used to fill a selection with a color or a pattern Create a selection with the rectangular marquee tool, Select the fill tool, and fill that selection with a color

Fill with Patterns I n the options bar of the Fill tool, select Pattern from the dropdown menu Select a pattern in the next drop down menu Fill a selection with a pattern

Adding options This triangle will open the dialog box Select Load Patterns Load new patterns This is the same for Loading Shapes, and Gradients

Cropping Cropping lets you ‘set’ an image. After you’ve selected the part of the image you want cropped, press Enter =

Brightness and Contrast In the menu bar go to: Image -> Adjustments -> Brightness and Contrast Adjust the brightness and contrast of an image Brightens and darkens the entire image Very little tonal control

Layer Mask When you have two layers, go to: Layers -> Add Layer Mask ->Reveal All Use the paint brush and erase tools to reveal and hide the layers

Filters In the menu bar there are a lot of Filters you can apply to your images

Custom Shapes Many useful shapes are predefined in Photoshop You can load shapes by pressing this button and selecting: Load Shapes

Gradients

Allow you to make colorful images Good to use for backgrounds You can load gradients the same way you load custom shapes