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AlexForbes

Image comparison tool - Hubble telescope example

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I thought this was kind of cool. It shows an image taken by the Hubble telescope to compare (I think) the movement of the stars.



Wouldn't this also be useful to developers working on graphic images within their games?

Having worked for a version control vendor in the past, directly from within Perforce or something would be cool too. I'll have to ask our PM about that. Haven't been here that long.

Best,
Alex

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I, of course, don't know how that particular software works, but it looks like variable alpha blending, which is, indeed, a useful graphics technique.

The principle is combining two images using something like:

screen_pixel = image1_pixel * alpha + image2_pixel * (1-alpha)

As alpha is varied from 1.0 to 0, the screen image shows image1 gradually "becoming" image2.

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