Search found 6 matches

by Alexis Rombaut
2020-02-19T08:17:15-07:00
Forum: Bugs
Topic: DNG to JPG results in distorted image.
Replies: 7
Views: 1513

Re: DNG to JPG results in distorted image.

Thank you for the dark table suggestion, that resolved our problem. We have changed our conversion chain for DNG by doing:
DNG -> PNG via darktable and then PNG -> JPG via IM.
by Alexis Rombaut
2020-02-13T06:41:00-07:00
Forum: Bugs
Topic: DNG to JPG results in distorted image.
Replies: 7
Views: 1513

Re: DNG to JPG results in distorted image.

Thank you for you replies. Let me also thank your open source dedication which has allowed us as commercial company to offer flexible conversion of images over many years. As requested here you can find two DNGs and the preview generated by the command convert at the following link . I have tried th...
by Alexis Rombaut
2020-02-12T10:48:37-07:00
Forum: Bugs
Topic: DNG to JPG results in distorted image.
Replies: 7
Views: 1513

DNG to JPG results in distorted image.

DNG conversion results in distorted image. https://i.ibb.co/02c4gDL/test.jpg Windows reports a bit depth of 24, while IM reports 16. Judging on the EXIF metadata, I think it should be 24 indeed (Bits Per Sample: 8 * Samples Per Pixel:3 --> 24). /bin/convert input.dng output.jpg root@dev-storage:/wor...
by Alexis Rombaut
2013-12-12T06:29:07-07:00
Forum: Users
Topic: IM and out-of-memory on debian
Replies: 1
Views: 1998

IM and out-of-memory on debian

According to the documentation IM should automatically switch to a file base cache when memory becomes scarce. What I however experience is that it is killed by OS when memory runs out instead of automatically switching to a file based pixel cache. Is there a way for IM do switch to file based cache...
by Alexis Rombaut
2013-11-29T03:18:26-07:00
Forum: Bugs
Topic: NEF thumbnail distorted
Replies: 3
Views: 5307

Re: NEF thumbnail distorted

Thank you for your swift replies. We found the cause of problem was indeed the very wide-angle lens. The delegate ufraw-batch which IM used for NEF has a compile option --with-lensfun which tries correct lensing effects. On debian the maintainer for the ufraw package has enabled this option. We now ...
by Alexis Rombaut
2013-11-28T09:56:08-07:00
Forum: Bugs
Topic: NEF thumbnail distorted
Replies: 3
Views: 5307

NEF thumbnail distorted

We use imagemagick to convert NEF to JPG thumbnails. For a particular D600 Nikon it produces an odd result. NEF: <on request> JPG: http://i.imgur.com/GfhGNJj.jpg?1 Note the distortion in the corner, especially in the top right corner * Command line: convert -verbose -limit memory 1073741824 -limit m...