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问题描述
我要遍历在 JPG 格式图像的每个像素的颜色，
I want to iterate over each pixel color in a jpg format image,
哪个库我应该是指做到这一点，这样的code可以尽可能的短？
which library should I refer to to do this so that the code can be as short as possible?
推荐答案
我能想到的任何或。这里是一个。它们抽象掉了很多DECOM pression细节，只是给你一个网格的工作。
I can think of either ImageMagick or CImg. Here is a CImg tutorial for you. They abstract away a lot of the decompression details and just give you a grid to work with.
如果您CIMG去，你只需要使用通话。你也许可以这样做：
If you go with CImg, you only need to use the data call. You can probably do something like:
CImg<unsigned char> src("image.jpg");
int width = src.width();
int height = src.height();
unsigned char* ptr = src.data(10,10); // get pointer to pixel @ 10,10
unsigned char pixel = *ptr;
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