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I captured .ppm file from avi file. How can I convert .ppm into .jpg only using C for further processing? Please help me.
Posted
Updated 17-Nov-13 18:13pm
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enhzflep 18-Nov-13 1:01am
   
Since there's so much work that goes into a JPEG encoder/decoder, its not a practical solution to write that part yourself (about 1 man-year of work if my memory serves me correctly).

From a quick glance, the PPM format looks pretty simple, though there (almost certainly) has to be a library for that too.

I'd look at getting the data from the PPM file into a binary format, before using libjpeg to save it as you wish. If using c++ (& windows), you would then have access to GDI+ which is a part of windows that will let you save an image in any one of a number of different formats.
nv3 18-Nov-13 7:43am
   
My virtual 5.

1 solution

read this legendary article: CxImage
it served me well in fetching some details in image processing.

if you have a hand on COM you can try: http://msdn.microsoft.com/en-us/library/windows/desktop/ee690086(v=vs.85).aspx[^]

if you work from the scratch: draw the ppm on a DC in which your bitmap is selected. So you have the ppm in the bitmap after deselecting and go on.
   

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