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whodunit.c, one of the assignments for Problem Set 4, will challenge you to manipulate the color value of pixels in a bitmap image in order to reveal a hidden image.

2 votes

Pset 4: Whodunit Red to white

I'm not going to spoil the answer for you, but I'll share the line of reasoning that helped me to "get the red out" of the image. Think about this. The hexadecimal RGB representation of black is #000 …
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1 vote

Pset4 Whodunit: The person is still unrecognisible

Congratulations on "getting the red out" of the image. Now, if you'd like to view the image in 256 shades of gray instead of in pale cyan, you might want to consider what W3Schools has to say about He …
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1 vote

Which colours do I manipulate in whodunit pset4?

Google "hexadecimal grayscale values" -- w3schools.com will have the best tip of all, if you think about it for a minute. EDIT: Hexadecimal Colors: Shades of Gray It might seem counter-intuitive, bu …
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