Will the merge now permit X-Trans raw images to be used in the HDR module?
David
On 01/19/2016 08:42 PM, Ulrich Pegelow wrote:
> Hi,
>
> I just merged my OpenCL implementation of the Markesteijn demosaicing
> algorithm into master. Markesteijn with one or three passes ("-1" and
> "-3", respectively) is darktable's preferred method for demosaicing
> images of cameras with Fuji's X-Trans sensor.
>
> The algorithm is rather complex and has a significant memory overhead.
> Therefore the performance advantage over the already well established
> CPU codepath will depend a lot on the GPU hardware. In my case (AMD
> Radeon HD7950) I get roughly a 2 times faster processing compared to
> my i7-2600@3.4GHz.
>
> But that's just one system. Slower GPUs might even underperform versus
> the CPU. I would like to gather more benchmarking data in order to
> decide if the OpenCL codepath for Markesteijn should be enabled by
> default or not.
>
> So if you are running master and if you have a working OpenCL system I
> am highly interested in your comparison of OpenCL versus CPU speed.
> Please start darktable with '-d opencl -d perf' and do a few test:
>
> 1) with OpenCL enabled in preferences
> 2) with OpenCL disabled in preferences
>
> Please perform:
>
> a) exporting an X-Trans image with default history stack
> b) as above but now with demosaic set to Markesteijn-3
>
> Don't forget to tell me your hardware setup (Graphics Card, GPU
> memory, CPU type, system memory).
>
> I am also interested how reactive darktable acts in darkroom mode if
> you pan the image or change some module parameters (take exposure
> correction as an example). Please zoom into the image with a zoom
> level of 67% or a bit more. This test is more about "look and feel"
> rather than an exact measurement. Does darktable react more "snappy"
> with OpenCL or just the opposite?
>
> If you don't have an X-Trans sensor raw at hand you can download one
> from here:
>
> https://www.dropbox.com/s/gef9qkapkktrjn5/DSCF6768.RAF?dl=0
>
> Thanks for your support!
>
> Ulrich
>
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