Image Conversion: RGBA to RGB

Question

Assuming RGBA (32 bits) is output from the frame grabber and the alpha channel is not used (values ​​are saved when filled with frame grabbers), is there any efficient conversion method to RGB (24 bits)?

I deal with 5 MegaPixels streaming images, so speed matters too. keep in mind that data in the alpha channel may be discarded.

Answer 1

Just copy the data and skip unused alpha bytes.

If speed is important to you, you can use SSE or MMX and use the built-in bit shuffling instructions. This is usually slightly faster than regular c code.

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Answer 2

RGB - (1 ). . , Intel IPP-.