Search found 12163 matches
- 2013-05-13T15:44:43-07:00
- Forum: Bugs
- Topic: possible bug gradient with transparency IM 6.8.5.6 Q16 Mac
- Replies: 21
- Views: 10178
Re: possible bug gradient with transparency IM 6.8.5.6 Q16 M
convert -size 1x256 gradient:"rgba(0,0,0,0)-rgba(255,0,0,1)" -rotate 90 -scale 256x50! -alpha off 1grad_aoff.tiff Confimed that this gives solid red, apart from black strip down right side, tested on v6.7.9 and 6.8.0 to 6.8.5, on Windows 7. I think the result should be identical to ... co...
- 2013-05-13T11:49:34-07:00
- Forum: Users
- Topic: How to use edge detection to count number of edges / objects
- Replies: 1
- Views: 2956
Re: How to use edge detection to count number of edges / obj
If you can distinguish them, you can count them.
It's difficult to say more than that without a specific example. Can you supply a relevant image?
It's difficult to say more than that without a specific example. Can you supply a relevant image?
- 2013-05-12T21:38:26-07:00
- Forum: Users
- Topic: Request for output from automated operators
- Replies: 11
- Views: 7728
Re: Request for output from automated operators
Yes, I want to use Anthony's first method: from a representative frame (or a number of representative frames appended), do an automatic operation, then repeat the equivalent operation with identical parameters on all the frames in a clip. The only operation I use that IM doesn't give me useful infor...
- 2013-05-11T02:37:29-07:00
- Forum: Users
- Topic: Request for output from automated operators
- Replies: 11
- Views: 7728
Re: Request for output from automated operators
Well spotted, thanks!
- 2013-05-10T05:44:25-07:00
- Forum: Users
- Topic: Channels not a single grayscale?
- Replies: 7
- Views: 9166
Re: Channels not a single grayscale?
So your output has three channels, but they are equal at each pixel? For me, the output has a single channel. This is for both v6.7.9 and v6.8.5. However, these versions give slightly different results because of how IM treated greyscale files between those versions. I suspect the v6.8.5 gives the s...
- 2013-05-10T04:08:09-07:00
- Forum: Users
- Topic: Need .exr support for simple composite of tiled render
- Replies: 13
- Views: 9128
Re: Need .exr support for simple composite of tiled render
Sorry, I don't know the definitive answer. I think you need to recompile. However, the dynamic version uses DLL files, so maybe if you get hold of the appropriate DLL file (perhaps named CORE_RL_exr_.dll), that's all you need. Even then, you might need to tweak the delegates file.
- 2013-05-10T04:01:10-07:00
- Forum: Users
- Topic: Channels not a single grayscale?
- Replies: 7
- Views: 9166
Re: Channels not a single grayscale?
You are selecting one channel, with "-channel R". If you want all channels, don't select just one.
should create a tiff file with three greyscale images, representing the R, G and B channels of rose.
Code: Select all
convert rose: v.tif
- 2013-05-09T23:26:59-07:00
- Forum: Users
- Topic: Request for output from automated operators
- Replies: 11
- Views: 7728
Re: Request for output from automated operators
Code: Select all
identify -format "%[fx:log(mean)/log(0.5)]" rose:
- 2013-05-09T23:10:30-07:00
- Forum: Users
- Topic: Request for output from automated operators
- Replies: 11
- Views: 7728
Re: Request for output from automated operators
Thanks Fred. For contrast-stretch, I currently use an external program that reads a histogram file and spits out the appropriate level operator for given thresholds. I had brain-fade, and had forgotten min, max and %P%O. Can I query your gamma formula? identify -format "%[fx:mean] %[fx:log(0.5/...
- 2013-05-09T21:47:43-07:00
- Forum: Users
- Topic: Request for output from automated operators
- Replies: 11
- Views: 7728
Request for output from automated operators
When processing video frames, I often want to apply the same processing to all the frames in one clip. IM has automated versions of manual operators (eg "-auto-level" and "-level"). Using the automated version on all frames generally gives a jerky result. I would like to use the ...
- 2013-05-09T18:59:51-07:00
- Forum: Users
- Topic: Stripping color profiles from images for use on the web?
- Replies: 3
- Views: 3059
Re: Stripping color profiles from images for use on the web?
If you merely strip the profile, browsers will assume the image is sRGB. But the image might not have been sRGB.
It might be safer to:
It might be safer to:
Code: Select all
convert {blah blah} -profile sRGB.icc -strip outfile
- 2013-05-09T04:41:41-07:00
- Forum: Users
- Topic: Need .exr support for simple composite of tiled render
- Replies: 13
- Views: 9128
Re: Need .exr support for simple composite of tiled render
I tried "convert memorial.exr m.png" with IM v6.7.9, 6.8.0, 6.8.1, 6.8.2, 6.8.3, 6.8.4 and 6.8.5. Sorry, no luck.
- 2013-05-09T04:01:41-07:00
- Forum: Users
- Topic: Need .exr support for simple composite of tiled render
- Replies: 13
- Views: 9128
Re: Need .exr support for simple composite of tiled render
"identify -list format" doesn't list exr. Ahh, that's interesting. The file I created, r.exr, seems to be a PPM file, and starts with: P6 70 46 255 I know nothing about exr, but that seems unlikely. More testing revels this behaviour happens for any random collection of junk characters as ...
- 2013-05-09T01:47:54-07:00
- Forum: Users
- Topic: Need .exr support for simple composite of tiled render
- Replies: 13
- Views: 9128
Re: Need .exr support for simple composite of tiled render
I run Windows 7. The pre-compiled IM v6.8.5 seems to handle EXR. At any rate, the following work (which doesn't prove it is correct, of course):
Code: Select all
convert rose: r.exr
convert r.exr p.png
- 2013-05-08T13:23:50-07:00
- Forum: Users
- Topic: Add a pattern to a b/w image
- Replies: 4
- Views: 3913
Re: Add a pattern to a b/w image
Yes, the equivalent of selections in IM is masks. For shrinking or expanding, the morphology operators are very useful. For some cases, blur and threshold works well.