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AfterFilter 0.1AfterFilter is a tool for converting colour images to black and white.Ordinarily, you might do this by choosing "Desaturate" in PhotoShop, or by converting the image to greyscale. By doing this, you are missing out on a wide range of options for your image. AfterFilter mimics the effect of using coloured filters with black and white film. The difference is that you can do it after you have exposed the film. | |||||
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Here are some screenshots: Original image
Nice doggy. 
This mimics what you get from a standard Photoshop greyscale conversion (either by using desaturate or by converting to greyscale). 
Here the image is made entirely from the red component, as though you had used a perfect red filter. The dog's nose is a bit blown out with this setting. 
A green filter. This often has the effect of simulating infra-red film, especially if there is lots of foliage in the image. 
A blue filter effect. The blue channel on slide film tends to be the noisiest. Not a good choice for many images. 
This looks about right to my taste. As you adjust one of the sliders, the others are automatically adjusted so that the total of the three sliders adds up to 100%. | |||||
Here they are again side by side for comparison:
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Download AfterFilterAfterFilter only runs on Mac OS X. It is implemented in Cocoa, so it may compile on GNUStep or OpenStep. Let me know if you manage this. I only used Cocoa because I wanted to learn Objective-C. I found out that it's an excellent language with a cool runtime system. It'll never catch on. |
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NotesAfterFilter only runs on Mac OS X.It supports files of the following types:
AfterImage is only half implemented. Some of the menu items aren't wired up yet. You can't yet save the images, but you can make a note of the setting and use them in Photoshop's channel mixer. I haven't really tested it. Using it on images with fewer or more than three samples per pixel could trigger epileptic fits. May contain nuts. |