I'm using Samsung galaxy S20 capture an image and save to dng format. I want to use opencv c++ in Visual Studio show this image. Please help me read dng file and convert to Mat in opencv C++.
Thank you.
By reading other topics and sample unprocessed_raw, I understood that LibRaw allow me to get the unprocessed data in except of the linearization step.
However, I would like to also access the compressed data from the DNG file produced by my camera (a laboratory microscope).
I tried to follow step-by-step the operations handled by unpack() but I'm not good enough to understand clearly what happens when the load_raw function is called (in unpack.cpp at line 287) and more precisely what are the purpose of ljpeg_start and ljpeg_row.
Hi all, I decode some new iphone raw DNG files (maybe proRaw file) with Libraw 0.20 release, VS2015 compiler, and I got some problems:
1. I use command "dcraw_emu -T -6 -q 0 e:\Image_1_2020-11-14_20-51-45.dng" to decode the sample DNG file, and I got a tiff file and with no error, it seems all is good.
Hello, has anyone been able to get the color from dcraw_emu.exe to match Blackmagic DaVinci Resolve with DNG files? If so, do you have the specific parameters that would make that possible?
Is there any recommended way to use LibRaw to simulate what Monochrome2DNG does, namely bypass demosaicing and pass the data through as monochrome instead of processing it as RGGB?
Hi,
I am using libraw to render a 16-bit sRGB image from a RAW file. I understand that I need to set certain fields of output_params to enable this correctly. My settings based on my understand is below:
According to documentation which for dcraw_make_mem_image says:
This function allocates memory buffer and stores unpacked-preprocessed image into this buffer. Function returns allocated structure libraw_processed_image_t with filled fields. Always returns data as RGB bitmap
I am trying to save the image from buffer as a bitmap image.
First of all, I am amazed how you keep responding to all the comments in the forum. If there is a PayPal link to donate to your efforts, please let me know. I'd like to invite you for a beer.
Second: I am having trouble getting user_mul[] multipliers to work. In the code I am using I has the following steps
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