Re: Dcraw Windows 64 Bit
Lin Hosley
dcraw is an open-source computer program which is able to read numerous raw image format files, typically produced by mid-range and high-end digital cameras. dcraw converts these images into the standard TIFF and PPM image formats. This conversion is sometimes referred to as developing a raw image (by analogy with the process of film development) since it renders raw image sensor data (a "digital negative") into a viewable form.
While most camera manufacturers supply raw image decoding software for their cameras, this software is almost always proprietary, and often becomes unsupported when a camera model is discontinued. The file formats themselves are often undocumented, and several manufacturers have gone so far as to encrypt all or part of the data in their raw image format, in an attempt to prevent third-party software from accessing it.[4]
Given this ever-expanding plethora of raw image formats, and uncertain and inconsistent support for them by the manufacturers, many photographers worry that their valuable raw images may become unreadable as the applications and operating systems required become obsolete.[5]
dcraw is built around the Unix philosophy. The program is a command line tool which takes a list of raw image files to process, along with any image adjustment options desired. dcraw also serves as the basis for various high-level raw image-processing applications (such as viewers and converters), both free and open source software as well as proprietary software.
Several GUI front-ends for dcraw are available. These applications use dcraw as a back-end to do the actual processing of raw images, but present a graphical interface with which the image processing options can be adjusted.
Also, LightZone uses dcraw for its Raw conversion, but it doesn't give you access to the various flags and stuff. The conversion is just a necessary step in the digital darkroom process that LightZone implements.
+1 for LightZone. Also, take a look at Helicon Filter 5 . It has DCRaw as an option along with a couple other RAW developers. Nice, easy interface. HF 5 is free to use with ad support after a 30 day trial.
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Also beware, the does shell has a maximum character limit. I have several bat scripts at work that use imagemagick on win 7, and I generally hit that max length limit when processing between 10 - 20 files at a time
Hey, thanks a lot! I finally figured it out with help from the stackoverflow thread that @heckflosse linked to. It probably took me half an hour, because I had no idea what the correct syntax was to make dcraw and the FOR command work with each other. Just for future reference, the command that worked for me is:
It defaults to the same name as the original .PEF file, but I want to rename them to something else, like converted_raw. I found the -O switch which works for 1 file, but when used with the FOR loop, it just overwrites the file with the same name over and over again, instead of creating a new one.
Thank you for the support! Indeed the latest version of the toolbox does not use dcraw anymore but there might be cases where people do need to revert to older version of the toolbox. Much appreciated!
dcraw isan ANSI C program written by Dave Coffin to decode any raw image from any digital camera on any computer running any operating system. Thousands of people use dcraw without knowing it, as Bibble, BreezeBrowser, IrfanView, Conceiva, and the Adobe Camera Raw plugin all contain source code from dcraw.
You shouldn't be afraid of the command line if you want to use dcraw directly. If you simply call it, it gives you a short syntax help. However, it is easy to integrate it in windows explorer right click menu, once you found your favourite parameter settings:
Actual parameters may vary according to your needs. Call dcraw at the command line to get a parameter overview. You might consider using the -n and -m switch and play with the -b setting (values below 1.0) in order to get maximum dynamic range.
Even after conversion into a gamma 2.2 working space the images might look dull. Don't worry. If you use them with full 16 bit workflow for panorama creation you wont loose anything. You can adjust levels and contrast in your ready stitched panorama.
Users of other operating systems or other image processores can apply a gamma of 2.2 to those linear gamma files produced by dcraw in their favourite 16 bit per channel capable image processor (e.g GIMP on Linux).
This version of C:\Program Files (x86)\Qtpfsgui\dcraw.exe is not compatible with the version of Windows you're running. Check your computer's system information to see whether you need a x86 (32-bit) or x64 (64-bit) version of the program, and then contact the software publisher.
I'm using DCRAW to import RAWs into a software for the purpose of astro image processing. Actually I'm going to migrate to LibRaw for this purpose.
A problem I face thereby is related to some optimisations I implemented in the DCRAW processing sequence. These optimisations dramatically speed up the conversion for many of the frequently used formats like CR2 and the special needs of astro image processing.
My typical processing route leaves the DCRAW sequence after executing (*load_raw)() and selectively calls original or modified DCRAW functions depending on the RAW format and user options.
When I was looking into the LibRaw sources and examples I found that there are several differences between the original DCRAW and LibRaw::dcraw_process() which might make it quite laborious to transfer my adaptions from DCRAW to LibRaw. Therefore, as a first step, I plan to not replace DCRAW by LibRaw completely. Instead, I want to use LibRaw until LibRaw::unpack() and thereafter use my code with as few changes as possible.
Do you think this approach s feasible and reasonable, or are there some pitfalls I overlooked?
Can I reconstruct all the DCRAW data structures from their LibRaw equivalents (without too much effort)? Or is there even some sample code doing that?
Although most functions in LibRaw/internal/dcraw_common.cpp looks like untaltered dcraw.c code, this is not completely true.
Data layout in LibRaw is different and old (dcraw's) variables are #define-d in internal/var_defines.h
Another thing: I noticed that I couldn't readout the Canon sensor temperature (which is important for long exposure dark subtraction) by use of set_exifparser_handler(), because the sensor temp appears in parse_makernote(), where the EXIF callback is not called. For the moment I solved this by inserting this callback in parse_makernote() in dcraw_common. May I suggest to either do so too in future versions, or to readout the sensor temperature to imgdata.makernotes.canon?
lossless_jpeg_load_raw() in LibRaw/dcraw is completely different from RawSpeeds. It handles all ljpeg formats at once, while RawSpeed has separate code (subclassing/using own common decoder) for different vendors. LibRaw+RawSpeed combo works perfect now (although we've blacklisted some cameras in LibRaw::unpack()), so why do backport?
I was absent for some days but now I have tested the temperature patch and can report that for my EOS 1100D the result is equal to what I extracted myself from the maker notes.
An additional information I can supply is that at least for the 1100D, but probably also for the other, more recent EOS models, this EXIF temperature is the true sensor temperature. For the 1100D I'm very sure about this and also for the 5D-MkII there is strong indication therefore.
I recently started to help out with photogrammetry pipeline for a student project. I would like to do artist-friendly yet accurate and proper workflow. It should be as automatic as possible. But that I will describe more in depth in other blog posts.
On Windows download it e.g. from here, rename to dcraw.exe and include folders location in PATH variable by adding the following line into your Nuke launcher (but before starting Nuke):
Hi @brett.walker, if you open the file with the Bio-Formats Importer (Plugins > Bio-Formats), that should give you a window with import options. If you change the colour mode in that window does it allow you to open the color calibration?
@dgault I was finally able to run a calibration on a 3-slice image opened using Bio-Formats Importer plugin by using the polygon ROI tool, rather than the rectangle ROI tool, selector. I had overlooked that detail in the plugin instructions for IJP Color Calibrator, my apologies.
That said, I still cannot get the image (i.e., any of the 3 image slices) to appear normal (i.e., in more or less real-life color) regardless of the options I select when importing the DNG file using Bio-Formats Importer. Which means neither of the calibrated images in output (sRGB or CIE Lab) show up with correctly calibrated color either. Any ideas how to get the DNG images to show up correctly when imported?
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