Put BMP image into 2D array and edit RGB values in C

Question

Okay guys, I am new to C and I am a trying to construct a 2D array that will hold a BMP image and be able to edit the RGB values. I haven't been able to find anything online about how to access the RGB values or how to put this image in the 2D array and I am really stuck as to where to start. HELP!!!!

.. and that was second one on the list from Google – Ed Heal Feb 06 '16 at 06:24 — Ed Heal, Feb 06 '16 at 06:24

score 0 · Accepted Answer · edited May 23 '17 at 12:30

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See the reference Writing BMP image in pure c/c++ without other libraries of Ed Heal. Things to note:

Define the structures. Don't use arrays of unsigned chars to make the headers as in the referenced post.
Both in reading and writing, take care to fill the scanlines. They must be a multiple of four, so the last bytes may not be pixels and contain garbage.

See also my earlier post What is wrong with this code for writing grey-scale bmp from an image RGB bmp pure C - Windows OS which contains the headers and can serve as a partial example.

edited May 23 '17 at 12:30

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answered Feb 06 '16 at 07:15

Paul Ogilvie

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Thanks! I think part of my issue is mainly knowing what to look for. My instructor is extremely non-specific and gave us no examples. We just learned how to use 2D arrays in C and she the gave us this homework that seemed like an extreme logical jump to apply it to images, she didn't even teach us about importing images yet! – WilliamA Feb 07 '16 at 01:59

Put BMP image into 2D array and edit RGB values in C

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