Hugh Kawahara's Colleen's Photoshop Fun Pack Filter plug-ins for Adobe Photoshop 3.0
Macintosh 68k
Charityware (You are welcome to distribute and use them freely. But, If you appreciate them, please make a donation of any amount to your favorite charitable organization.)
Run/Install

This package includes all plug-ins listed below, which you install by moving the folder into your "Plug-ins" folder and (re)start Photoshop. Please read the "*.doc" file in the folder for usage.

1. Rotate Color (version 1.0.1) This is the most fun plug-in of all. It rotates the color in the RGB space. Confused?

2. Create B/W (version 1.1.0) This is the coolest plug-in of all, if you are into B/W photography. It creates black and white (gray scale) images from color images. It lets you adjust the ratio of red, green, and blue in the final gray scale image. It also allows you to adjust the brightness and contrast. Now 1.1.0 does CMYK as well as RGB images.

3. Kwick Mask (version 1.0.0) This is the most useful plug-in of all. It's a tool rather than a filter. It creates a selection from RGB images. It works similar to "Color Range" command in Photoshop, but it lets you set the tolerance explicitly in either HSB or RGB mode. It also allows you to use up to 31 sets of tolerances. It requires extra (image_width*image_height) bytes of memory.

4. Adjust Saturation (version 1.0.1) w/ examples! This plug-in gives you more control over the saturation adjustment. It can adjust the "contrast of the saturation". By increasing this contrast, you can saturate the saturated color even more, and saturate the un-saturated color even less. This filter conserves either the luminance Y = 0.30R + 0.59G + 0.11B or the intensity I = (R + G + B)/3. Conserving the luminance Y usually gives better results. A bug on masking the effect is now fixed.

5. Modulate Color (version 1.0.1, 80k bytes) w/examples! This plug-in modulates the HSB (hue, saturation, and brightness) value of the image using the mask value. The saturation and brightness control work very similar to those of Photoshop's Hue/Saturation adjustment. The difference is that, with this filter, the mask value determines the amount of hue rotation rather than the opacity of the effect. Therefore, it is essential to use density masks with values between 0 and 255 rather than simple masks with value 0 and 255 only.

Download current version http://www-leland.stanford.edu/~kawahara/photoshop.html