Converting a proprietary raw image format to Adobe DNG

I have a proprietary raw camera image format taken from a Aptina camera. It's raw file format is 16bit per color channel, 'GRBG' mode with file extension is *.raw. No headers nothing, just plan raw bayer samples. I want to convert this format to DNG, as none of the raw image decoders (dcraw,gimp,...) seem to support it.

1] Is there any tool/converter which can handle Aptina camera sensor raw bayer format, and allow me to convert it to D开发者_如何学编程NG format?

2] If not, I want to write a small C code to convert it myself. Where can I find the detail specification about DNG format, its structure etc. Any document explaining all this DNG format?

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The specification for DNG lies at http://www.adobe.com/products/dng/pdfs/dng_spec_1_3_0_0.pdf There are several versions though managed as explained. Check out the Adobe DNG Converter, it might help.

You could contact Aptina if you are motivated ;) There is an FOSS library that handles RAW at http://www.libraw.org/ but it seems to require headers to be able to work, as it is based on dcraw.

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If you are looking for C code, there is a basic converter for raw 16-bit Bayer images into DNG here. It only supplies enough DNG information to get it to load but that should be fine for feeding it into image processing applications.