Thanks for the effort on this! I was doing basically the same thing previously, but perhaps not as expansively.

I am having one problem that I do not understand. I am invoking the following methods:

open_buffer(data,length)
unpack()
dcraw_process()
dcraw_make_mem_image(&ret)

I am then taking the image data and with copy_mem_image trying to display it.

This is working with many, but not all raw test files that I have.

How would one simulate the following using libraw

dcraw32 -4 -D -T

and

dcraw32 -o1 -T

Thanks for any help.

Hey folks,

last semester I did a nice seminar about image processing and somehow the demosaicing algorithms got me. So I'm now experimenting with different demosaicing and image processing algorithms and recently started to implement some testcode using libraw for reading DSLR photos. Now I have a few questions to better understand what's happening where the documentation didn't help or maybe I didn't understood it well.

Hi everyone,

First of all thanks for that wonderful library !

I've some issues, passing Raw Datas to an OpenCV Mat.

At first i used dcraw, but there is too much processing for me, my output images is blurred and pinked (yeah my picture has too much red in it i don't know why). So i tried to change dcraw processing params, but it was worse.

So i'm trying to used the unprocessed data and to fill a cv::Mat with it ! I read a lot of topics in this forum, and tried a lot of fixes, but i couldn't manage to do what i needed.

Hi.

If I understand the documentation of user_flip correctly, not setting it (keeping it's default value of -1) should "auto rotate" the image according to what the accelerometers of the camera have detected when the image was shot.

Are there any known issues with Sony's arw files? It does not seem to work, while xnView (which claims to use dcRaw) rotates the image...