Search found 8887 matches
- 2018-08-07T16:31:31-07:00
- Forum: Users
- Topic: Is it possible to combine 2 images & make a transparent PNG?
- Replies: 8
- Views: 27248
Re: Is it possible to combine 2 images & make a transparent PNG?
I think this is similar to the example... http://www.imagemagick.org/Usage/masking/#two_background Two images same foreground different background... Recover the foreground on transparency. Also see discussion "undo a composite -dissolve" http://www.imagemagick.org/discourse-server/viewtop...
- 2018-08-05T16:50:46-07:00
- Forum: Users
- Topic: How do I Apply Multiple Screen and Multiply to one image?
- Replies: 27
- Views: 32077
Re: How do I Apply Multiple Screen and Multiply to one image?
I was unaware at Associate and Disassociate options as well. Any idea as to what they actually do? does it actually add/delete the alpha channel data from the image? The page is not exactly clear (needs some examples I suppose). Also the aliases 'On' and 'Off' are missing from the list as being the ...
- 2018-06-24T21:45:12-07:00
- Forum: Bugs
- Topic: [CLOSED] possible bug +distort polynomial
- Replies: 12
- Views: 17898
Re: [CLOSED] possible bug +distort polynomial
Using +disort to map the source image bounds to destination image to calculate the bit-fit of the destination image viewport, needs the reverse of the distortion function. That is not possible with polynomial EWA calculations requires the derivative (slope) of the function going from destination ima...
- 2018-06-24T18:28:25-07:00
- Forum: Bugs
- Topic: [CLOSED] possible bug +distort polynomial
- Replies: 12
- Views: 17898
Re: [CLOSED] possible bug +distort polynomial
Lancos is a resampling filter and as such needs a resampling area (that is a Elliptical Weighted Average). Without EWA you can't use Lancos, but you can use a 'scale-less' single point lookup... That is Interpolation! The EWA may actually work, as the function derivative, which is what is needed for...
- 2018-06-23T05:45:30-07:00
- Forum: Bugs
- Topic: [CLOSED] possible bug +distort polynomial
- Replies: 12
- Views: 17898
Re: possible bug +distort polynomial
The difference in -distort and +distort is supposed to only be in the calculation of the 'viewport' of the final result. You can also override the viewport of BOTH of those operators using -define distort:viewport=WxH+X+Y See http://www.imagemagick.org/Usage/distorts/#distort_viewport You can get mo...
- 2018-05-15T20:56:13-07:00
- Forum: Bugs
- Topic: ephemeral: no longer works
- Replies: 2
- Views: 9324
ephemeral: no longer works
ephemeral coder no longer appears to work.
Is this intentional?
Is this intentional?
- 2018-02-07T17:52:33-07:00
- Forum: Developers
- Topic: Crop to an aspect ratio with "-crop 3:2"
- Replies: 9
- Views: 39506
Re: Crop to an aspect ratio with "-crop 3:2"
Whether to actually switch from 3:2 to 2:3 depending on image orientation may need to a option for users that do NOT want to do it (EG; they are fitting photos into a thumbnail array). I do think this will need to be a separate option, as there is currently no way to determine if a ':' was used in a...
- 2018-02-07T17:08:52-07:00
- Forum: Developers
- Topic: Crop to an aspect ratio with "-crop 3:2"
- Replies: 9
- Views: 39506
Re: Crop to an aspect ratio with "-crop 3:2"
This is a viewport crop, which is similar to the calculated 'Centered Square Crop' http://www.imagemagick.org/Usage/distorts/#centered_square of course with IMv7 you can do this using -extent instead ;-) It is also related to a rotate-and-resize-crop method http://www.imagemagick.org/Usage/distorts/...
- 2018-01-21T20:14:21-07:00
- Forum: Users
- Topic: How do I Apply Multiple Screen and Multiply to one image?
- Replies: 27
- Views: 32077
Re: How do I Apply Multiple Screen and Multiply to one image?
If you are composing multiple images together with the same compose method then you can also use the laying operators to do this... http://www.imagemagick.org/Usage/layers/#compose The only tricky part about this is that the first image (the background color) needs to be selected to be white, black,...
- 2018-01-18T18:36:19-07:00
- Forum: Users
- Topic: looking for docs for PRINT command
- Replies: 12
- Views: 17010
Re: looking for docs for PRINT command
Also see Identify Output Alternatives...
http://www.imagemagick.org/Usage/basics/#identify_alt
http://www.imagemagick.org/Usage/basics/#identify_alt
The main difference between "-identify" and "-print", is that first will be run once for every image in memory, while the later will only run once.
- 2018-01-18T18:17:14-07:00
- Forum: Users
- Topic: How to colorize an image?
- Replies: 13
- Views: 22565
Re: How to colorize an image?
For additional information on specifying colors...
http://www.imagemagick.org/Usage/color_basics/#colors
And for the myriad methods and techniques available in re-coloring images...
http://www.imagemagick.org/Usage/color_mods/
For tinting...
http://www.imagemagick.org/Usage/color_mods/#tinting
http://www.imagemagick.org/Usage/color_basics/#colors
And for the myriad methods and techniques available in re-coloring images...
http://www.imagemagick.org/Usage/color_mods/
For tinting...
http://www.imagemagick.org/Usage/color_mods/#tinting
- 2018-01-18T17:54:04-07:00
- Forum: Users
- Topic: Crop sprites for minimal spritesheet size
- Replies: 19
- Views: 24974
Re: Crop sprites for minimal spritesheet size
I do not know if this will be useful to this discussion, as I can't find any link to a set of example images to try it on. Have you looked at... -layers trim-bounds This takes images with virtual offsets, and ignores the existing 'canvas' size. It then sets all the images so they have the same sized...
- 2017-12-07T17:58:00-07:00
- Forum: Users
- Topic: why is median of a sequence of images slower than mean
- Replies: 13
- Views: 19915
Re: why is median of a sequence of images slower than mean
I have updated IM Examples, adding a actual example for median
Its not a great example, but it does the job.
http://www.imagemagick.org/Usage/layers ... seq_median
Its not a great example, but it does the job.
http://www.imagemagick.org/Usage/layers ... seq_median
- 2017-12-07T16:23:57-07:00
- Forum: Users
- Topic: why is median of a sequence of images slower than mean
- Replies: 13
- Views: 19915
Re: why is median of a sequence of images slower than mean
The command line discards the source images, basically as it only has a single image list, so results of a image process replaces the source image list. However the imagemagick library does not have that restriction. The results are returned as a completely separate image list, preserving the source...
- 2017-11-30T16:39:44-07:00
- Forum: Users
- Topic: median of a sequence of images operating pixel-by-pixel
- Replies: 19
- Views: 49693
Re: median of a sequence of images operating pixel-by-pixel
Necro-post split into new topic viewtopic.php?f=1&t=33163