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2015-09-25 09:50:12 -0600 | commented question | Mat to raw Image Thank you very much for your help. I was misunderstanding the channels 8-bit coding. Your comment makes sense. I will post feedbacks if I can figure out the raw vizualisation issue. |
2015-09-25 05:53:47 -0600 | commented question | Mat to raw Image Thanks. I thought RGB was encoded into one byte (3 bits for R, 3 bits for G and 2 bits for B). So why 3 times the bytes ? I have updated my code with frame.total() * frame.elemSize(); but still no chance to visualize the raw image. I will anyway consider upgrading OpenCV (from legacy system) but still I do not understand why I cannot visualize that raw image. |
2015-09-25 05:24:22 -0600 | asked a question | Mat to raw Image Hello, I am having trouble writing a raw image from a Mat. I am using OpenCV 2.3.1. I have seen plenty of replies for the inverse operation (raw to Mat) but not Mat to raw. I am not even sure it is possible the way I do it since no headers are set. The following code opens a video, and saves the 10 first frames into files. When I try to open those file with XNview (for example), I get a black and striped image. Clearly not the expected image. The .raw file starts with plenty of 00 00 00 00 before the real content. I cannot figure out what I am missing. DO I need to add headers ? Thanks a lot in advance Here is the code : |