What's in lesson 3 ...
Arithmetic
More Arithmetic
Seagull Arithmetic
Color Replacement
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ZDNet University's Paint Shop Pro Lesson 3
More Image Arithmetic
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I scanned the photo on the left as a 75dpi jpg. The photo on the right is a gif image stolen from a Web site.
The spooky woman had just prepared for a halloween party. The stolen photo is a poor shot of Shoshone Falls on the
Snake River in Twin Falls, Idaho. The falls, higher than Niagra, is 212 feet high and you can see about half of
the falls in this photo. Lots of water flows in the spring but most goes through the power plant the rest of
the year. There is another photo that shows all of the falls at the bottom of this page. I have some much better
slides of the falls but don't yet have a slide scanner. You can definetly see the results of color reduction
from these images being saved as gif files.
So, what can be done with these two images. Let the arithmetic begin.
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This is the result of image addition. The divisor was 3 and the bias was 15.
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This is the result of image subtraction. The divisor was 1 and the bias was 15.
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This is the result of image darkest. The divisor was 1 and the bias -15.
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This is the result of image lightest. The divisor was 1 and the bias -15.
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This is a view from the air showing the whole of Shoshone Falls. About 2 miles west, which is down stream, is the place where
Evel Knievil made his attempt to jump the canyon on a motorcycle. He was actually successful in getting across
the canyon but when he deployed his parachute the wind caught it and blew him back south causing him to end up
in the canyon. Five miles east, which is up stream, is Twin Falls. There used to be two falls side by side there.
Now there is only one as the the other has been dammed for use by Idaho power to produce electricity.
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Arithmetic
Seagull Arithmetic
Color Replacement
Return to my Paint Shop Pro Home Page
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