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Photoshop Class

Sorry I didn't get the whole class in the picture!

7 February 2001

5: Filters

Let's give the poor skier a rest this week, and work with some images that are already cropped, color-corrected, and have optimum tonality. For both the balloon and the jelly beans:

  1. Hold down the control key and hold down the mouse button on each of the above links.
  2. A pop-up menu should appear.
  3. Select "Save this Link as..."
  4. The standard file dialog should appear.
  5. Navigate to your class folder on the desktop.
  6. Press "Save" to save it with the default name.
  7. Go to the Apple menu and start Photoshop.

We'll begin playing with filters and special effects, using various "Filters" menu items. Some of the more useful ones for photography are:

  1. Filter --> Blur --> Gaussian Blur...: the most useful adjustable blurring effect.
  2. Filter --> Distort...: various special effects.
  3. Filter --> Noise --> Dust and Scratches...: an adjustable filter for fixing scans.
  4. Filter --> Noise --> Add Noise...: good for simulating film grain.
  5. Filter --> Sharpen --> Unsharp Mask...: the most useful adjustable sharpening effect.
  6. and many more that are less specific to photography -- "painterly" effects, sci-fi effects, and some that are just weird!

31 Janpary 2001

4: Tonal Control

We'll begin playing with tonal controls, using various tools and techniques found under the "Image --> Adjust" menu item, such as Levels, Curves, Brightness/Contrast, Hue/Saturation, etc.

Our old friend the skier will get a work-out (use the copy already on your local disk), but here are some other images we will work with:

  • Sky and shadow -- combine a contrast mask with the curves control to bring out shadow detail without blowing out the highlights.

24 Janpary 2001

Today, we'll start with a brief review of size and resolution. IF YOU DON'T UNDERSTAND SIZE AND RESOLUTION, YOU'RE GOING TO HAVE TROUBLE WITH EVERYTHING ELSE!

2: Selection

Basic selection technique is the key to working with portions of images. When you've mastered selection, you can modify parts of your image without affecting the rest of your image. The most difficult and powerful concept to master is partial selection, which means that effects you apply take partial effect.

First, get the small working image we used in the previous class. After clicking on the preceding link, choose "File -- Save As..." from the menu bar. It will prompt you for a location. Navigate to your folder, and make sure the image name ends with ".jpg" and press "Save."

We'll be exploring these selection techniques:

  1. Marquee Tools
    1. let you select a geometric area, such as rectangle or elipse,
    2. let you select a specific area, such as 100x100 pixels.
  2. Lasso Tools
    1. let you "draw" an irregular selection,
    2. let you select an arbitrary polygonal area,
    3. let you select along a change in color.
  3. Crop Tool
    1. lets you eliminate everything outside a rectangular area,
    2. lets you crop a specific area, such as 100x100 pixels,
    3. (you can also crop adter making a rectangular selection),
  4. Magic Wand Tool
    1. lets you make a selection based on color
    2. can be contiguous or non-contiguous
  5. Quick Mask Mode
    1. lets you "paint" a selection
  6. Selection modifiers
    1. hold down "Shift" to add to an existing selection,
    2. hold down "Option" to remove from an existing selection,
    3. hold down "Command" to cut and drag the image in an existing selection.
  7. Selection Menu
    1. Invert -- select everything that was not selected, and vice-versa,
    2. Color Range -- allows you to select based on shadow, highlight, or color,
    3. Feather -- softens the edge of a selection,
    4. Expand, Contract -- make selection bigger or smaller,
    5. Save -- create a mask from a selection.

Here are some more images for working on. I'll be giving you specific directions in class, or if you're a quick study and get bored, feel free to download these and try different selection techniques with them.

  • Baloon -- try different ways of selecting the balloon!
  • Snowy fir tree -- can you give this a pretty blue sky?
  • Jewelry -- try changing the background.
  • Jelly Beans -- yum! But what if you don't like black ones?

Here are some examples of what you can do with selections:

  • Julie and Smalltalk the cat -- my 11-year-old niece did these in a few minutes, with a little help!
  • Kelsey -- my nephew and his clone at Ecola Bay State Park.
  • AJ -- and Smaltalk at Multnomah Falls, although neither was ever there.
  • AJ and his mother, Jenise -- did a mutual head transplant.
  • Yours Truly -- skiing under a typical Mt. Hood sky.

3: Masks

A mask is very much like a selection, but can be used in many more ways. We'll be making selections, turning them into masks, and applying effects through those masks.


17 January 2001

Dear Canby Community Schools Learner,

This is our site. Each week, I'll be putting stuff here for you to use during class, reference links for your own exploration, and also the results of your work, if so desired.

0: Setup

Open your hard disk by double-clicking it. Create a new folder. Re-name it to your first and last name. Open the new folder and position it in a corner of your desktop.

1: Size & Resolution Basics

Understanding resolution is perhaps the most important and fundamental thing you can do. If you don't understand resolution, very little of the rest of Photoshop will make much sense!

Here is your large working image. After clicking on the preceding link, drag the image into your folder and copy it. rename the copy to "large.jpg".

Here is your small working image. After clicking on the preceding link, drag the image into your folder and copy it. rename the copy to "small.jpg".

We'll be playing with these images in class, and you'll thoroughly understand resolution.

last modified on Tuesday, 13-May-2014 12:16:23 PDT

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