if at all, such support should go into lensfun or be implemented as a
converter script (also see
http://www.mail-archive.com/[email protected]/msg00468.html).
personally i don't care too much, i hardly ever use lens correction (maybe
once or twice every 10k images for a fisheye lens).
j.
On Sun, Jul 21, 2013 at 6:12 AM, Jose Carlos Garcia Sogo
<[email protected]>wrote:
> Why should be supporting closed source data instead of promoting the open
> options so they are more complete?
> El 20/07/2013 12:16, <[email protected]> escribió:
>
> Currently, darktable uses lensfun to correct lens distortion,
>> chromatic aberration and virgetting. However the current lensfun
>> database is very limited and it does not have many lens such as the
>> Canon 18-135mm zoom. Yet for a novice, it is very tedious to create a
>> lens profile manually, and mistakes in this manual process can easily
>> led to more distortion in the processed images. Moreover, Adobe has
>> all aberration and virgetting correction information, whereas lensfun
>> often only has distortion correction without the other functions for
>> many lenses.
>>
>> In rawtherapee, if there is an adobe lcr lens profile correction file,
>> then the user can simply specify that file in the lens correction
>> module, and the module can make use of the profile that is created and
>> verifed by Adobe.
>>
>> I guess it would just involve changes to the lens correction module
>> only, where by default it uses lensfun, but users can override by
>> specifying that adobe LCR were to be used and specify the LCR file.
>> These choices can be included in the sidecar file. In the latter
>> case, the module can simply use whatever engine used by rawtherapee to
>> make use of the LCR file.
>>
>> In this way, darktable can correct all lens that are supported by
>> Adobe. I believe this is very important, as the inability to correct
>> lens faults will often be a showstopper for many user and be a major
>> obstacle for the users to use darktable.
>>
>>
>>
>> kcleung
>>
>>
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>
>
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