4/18/2023 0 Comments Libraw rawdigger![]() In my preliminary testing I am seeing LR doing a better job with the native pixelshift DNG file than the DNG file that PS2DNG outputted. So my findings is that LR can indeed handle and process pixelshifted files now, so long as motion correction is not needed. I use dcraw to create linear TIFFs.Thanks for doing this Steve. ** A linear TIFF is the result of RAW processing with no white balance, normalization curves, colorspace, or color profiles applied. * I will let the good folk at CIE explain what "scene-referred" means. Bottom line is that PixelShift2DNG, while not fully equivalent to a RAW capture has similar flexibility with compatible tools and equivalent to working from a linear TIFF. ![]() Sufficient Pentax-specific metadata is retained such that when opened in PDCU or imported into Lightroom, the files are treated similar to if they were a single image capture from a Pentax camera.Near as I can tell, the data are equivalent to a linear TIFF** and a good approximation of the original RAW data. The data are in the form of RGB pixels based on extracted values from the four pixel-shifted captures, but without application of white balance or color profile and are "scene referred"*. The format is something called DNG Linear Raw (aka Linear DNG) which is the packaging of non-RAW, partially-processed image data in the DNG in place of camera-generated RAW data.Compatibility is poor with Affinity Photo 1.8.2.620 and PaintShop Pro X6.The DNG files appear to be well-formed and are compatible with RawDigger, Lightroom 6.14, PDCU 5.8.1, and dcraw 9.28 on my workstation.I had a chance to play with PixelShift2DNG and with the files it generates. PEF > exiftool -b -PreviewImage -w %d%f_previewsize.jpg anImage.PEFĭNG > exiftool -b -PreviewImage -w %d%f_previewsize.jpg anImage.DNG PEF > exiftool -b -ThumbnailImage -w %d%f_thumbnail.jpg anImage.PEFĭNG > exiftool -b -ThumbnailTIFF -w %d%f_fullsize.jpg anImage.DNGįor preview-size works for PEF and DNG the same. anImage.PEFĭNG > exiftool -b -Copy1:PreviewImage -w fullsizepreview/%d%f_.jpg. PEF > exiftool -b -JpgFromRaw -w fullsizepreview/%d%f_.jpg. But the results for PEF and DNG show significant differences.įor Pentax DNG I have to modify my commands concerning full-size and thumbnail image extraction! - So no Bug in Exiftool but a user fault! (sorry) Until now I thought that the command should be the same for PEF and DNG. ThumbnailImage : (Binary data 7115 bytes, use -b option to extract) PreviewImage : (Binary data 55587 bytes, use -b option to extract) JpgFromRaw : (Binary data 2829512 bytes, use -b option to extract) ThumbnailTIFF : (Binary data 57816 bytes, use -b option to extract) PreviewImage : (Binary data 54100 bytes, use -b option to extract) PreviewImage : (Binary data 2818959 bytes, use -b option to extract) The results for my test cases opened my eyes. > exiftool Pentax* Ricoh* -ext dng -ext pef -preview:all -a -G4 -s Phil Harvey posted a question and used the following command to show which previews can be extracted: All developers need bug reports to improve the product.It was an user error! Then I try to find the line "Orientation" and if there isn't "Horizontal (normal)" on that line then I rotate the image 90°. The only problem is the thumbnail is always horizontal, so to display it correctly I use following command : if it fails I use exiftool with this command : exiftool -b -Preview:PreviewImage filename.to extract the thumbnail from shell object helper : GetExtractImageItfPtr and ExtractImageGetFileThumbnail.In which way do you use these commands exactly using raw files from which Pentax DSLR?In my PentSig program I try : => The -a command simply dumps the existing meta data Įxiftool -a -w thumbsAndPreviews/%d%f_.jpg -ext DNG. I tested them as follows:Įxiftool -b -ThumbnailImage -w thumbnails/%d%f_.jpg -ext DNG. Of course I tried your other suggestions using DNG files from K-5, KP and K-1. The usual command to get a full sized jpg should be the following:Įxiftool -b -JpgFromRaw -w thumbsAndPreviews/%d%f_.jpg -ext DNG. This command I use all the time and it works - since years:Įxiftool -b -previewimage -w previews/%d%f_.jpg -ext DNG.
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