[argyllcms] Re: dcraw linear workflow?
- From: edmund ronald <edmundronald@xxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sat, 12 Sep 2009 22:11:44 +0200
what camera is this ?
On Sat, Sep 12, 2009 at 10:09 PM, Ben Goren <ben@xxxxxxxxxxxxxxxx> wrote:
> On 2009 Sep 8, at 11:35 PM, Pascal de Bruijn wrote:
>
>> On Wed, Sep 9, 2009 at 12:28 AM, Ben Goren<ben@xxxxxxxxxxxxxxxx> wrote:
>>>
>>> On 2009 Sep 8, at 2:07 PM, Pascal de Bruijn wrote:
>>>
>>>> I'm getting pretty decent results, using UFRaw and an IT8 target... so
>>>> I'm guessing it should be possible for DCRaw as well...
>>>
>>> Pascal,
>>>
>>> Are you using linear RAW files, or are you getting ``close enough'' and
>>> then
>>> refining the results?
>>
>> No, I'm using linear RAW files...
>>
>> The results are pretty good, but not perfect... I'm using
>> single-shaper matrix profiles, which have gotten me the best results
>> thus far...
>>
>> My method:
>> http://blog.pcode.nl/2008/11/15/color-profiling-your-own-dslr-redux/
>>
>> I'm still refining it a bit... but the general idea works well.
>
> I did a bit of experimentation and got some pretty good results:
>
>> profile check complete, peak err = 7.518615, avg err = 0.855233
>
> I used UFRaw to get the channel multipliers for the white balance by
> selecting most of the area of one of the neutral patches.
>
> Next, I used dcraw for the actual conversion:
>
>> dcraw -v -r 2.474 1.000 1.335 1.000 -o 0 -4 -T _MG_1397.CR2
>
>
> I then created a profile with each type of algorithm, and discovered that an
> XYZ LUT profile gave significantly better results than any of the others --
> according to the numbers, visually, and by checking with an eyedropper in
> Photoshop.
>
> I'm sure I'll do at least some more experimentation, but this should be good
> enough. If anybody has any suggestions as to make it even better...I'm all
> ears, of course.
>
> Thanks all for the help!
>
> Cheers,
>
> b&
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