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430

The "white" pixels in the apple picture contain the picture of a pear, stored at a much higher intensity, i.e. very bright. The "black" pixels in the pear picture contain the picture of an apple, stored at a fairly normal intensity, but scaled down to near black with the gamma correction. The image contains a gAMA chunk specifying a file gamma value of ...


181

This was a little too much for a comment, but hopefully it helps. So, I am fairly certain that this issue deals with the way the browsers interpret gamma information with PNGs. It's a pretty fun problem and deals with the ambiguities of gamma information in the first place. The article The Sad Story of PNG Gamma “Correction” provides a very nice summary of ...


26

Changing the gamma of an image consists in modifying the value gamma in: (R',G',B') = (Rɣ, Gɣ, Bɣ) which gives the output pixel color (R',G',B') displayed on the screen after applying the gamma function to the initial pixel values (R,G,B) (considering R,G, and B normalized between 0 and 1). Now, let's take the red channel for example. If R ...


7

It's not rounding pixels and the ICC color profiles are not the issue. It's a trick image, and some browsers display PNGs without gamma data. For those browsers, you see one thing, and for other browsers you see the full image (with the pear hidden in the background). I see either a apple/pear trick image, or I just see the pear, depending on if the ...


3

Try Yaurthek's NegativeScreen: NegativeScreen is a Windows application allowing you to invert your screen colors. Apart from accessibility matters, this software is especially useful when you are surfing on the internet in a dark room, and the screen is dazzling you. NegativeScreen was designed to work without impacting the performances and fluidity ...


1

If only Red is that important, then I would just go with the red film. The best you could do otherwise would probably be something like: Turn the backlight all the way down (Best if in the BIOS) Disable any smart or auto brightness software in Windows Enable one of Windows High Contrast modes (Black background, I am thinking High Contrast Black) Go into ...



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