Convert Mat image into a JPG without using CvSaveImage in OpenCV

Question

I wish to convert a mat image into a JPG image in the memory. I know I can use CvSaveImage for this, that creates a jpg file, I read it again and then stream it over the network. I wish to avoid this extra disk write-read operation. If you have any ideas, it would really help. There's a similar question on StackOverflow, but they ask how in C#, I need assistance with the C++ openCV library.

http://stackoverflow.com/questions/801199/opencv-to-use-in-memory-buffers-or-file-pointers — Warty, Dec 08 '13 at 22:16

score 4 · Answer 1 · answered Dec 08 '13 at 22:15

4

imencode/imdecode

(and again, CvSaveImage is C, not C++. avoid the whole outdated opencv C api, if you can. there' ll be no support for it in the near future)

answered Dec 08 '13 at 22:15

berak

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But this does not code it to jpg... – BenjaminFranklin Dec 08 '13 at 22:18
it encodes to a *memory buffer* of a png/jpeg – berak Dec 08 '13 at 22:20

Convert Mat image into a JPG without using CvSaveImage in OpenCV

1 Answers1