Search found 30 matches

by LDAsh
2019-06-04T01:53:49-07:00
Forum: Users
Topic: Onion-skin ghost (fake motion blur)
Replies: 3
Views: 1623

Re: Onion-skin ghost (fake motion blur)

I had a couple of ideas about how to make this much better, but not sure how realistic they are, or where to even begin... First would be some way of using some histogram (or similar analysis) verbose output to determine an angle, by comparing 2 or more images and examining where the most pixels hav...
by LDAsh
2019-05-31T20:11:19-07:00
Forum: Users
Topic: Onion-skin ghost (fake motion blur)
Replies: 3
Views: 1623

Onion-skin ghost (fake motion blur)

Wondering if anyone can offer suggestions for a better approach to doing this... ("Version: ImageMagick 6.9.0-1 Q16 x86 2014-12-22") This basically takes the previous 10 frames and blends them into the current frame, stronger and stronger, to give the illusion of motion blur. It's not 'tweening' bec...
by LDAsh
2019-05-09T17:13:01-07:00
Forum: Users
Topic: 'Silhouette-bleeding' for alpha'd mipmaps
Replies: 5
Views: 1970

Re: 'Silhouette-bleeding' for alpha'd mipmaps

Ah, I found this for GIMP:- http://gimpchat.com/viewtopic.php?t=3153 Still takes about as long if not longer, and still really needs the original pasted back in. And so anyway, I got about as far as I'm going to get with this for now, if anyone is interested:- http://www.violae.net/temp/silhouette-b...
by LDAsh
2019-05-09T13:57:34-07:00
Forum: Users
Topic: 'Silhouette-bleeding' for alpha'd mipmaps
Replies: 5
Views: 1970

Re: 'Silhouette-bleeding' for alpha'd mipmaps

Thanks for the replies. I can only use miff format for some commands because I get errors on others. Maybe something to do with using 6.9. Definitely useful advice for the future, though! I was really hoping for some advice about some other approaches with morphology. Maybe there's some way of getti...
by LDAsh
2019-05-09T08:42:59-07:00
Forum: Users
Topic: 'Silhouette-bleeding' for alpha'd mipmaps
Replies: 5
Views: 1970

Re: 'Silhouette-bleeding' for alpha'd mipmaps

Here's the example:-
http://www.violae.net/temp/silhouette-bleeding.zip

I'm actually not sure how I could combine the commands, since each output from the first "BAT chunk" is used in each command in the second "chunk".
by LDAsh
2019-05-09T08:08:07-07:00
Forum: Users
Topic: 'Silhouette-bleeding' for alpha'd mipmaps
Replies: 5
Views: 1970

'Silhouette-bleeding' for alpha'd mipmaps

I've been working on a pretty convoluted script (typical of me) for doing what I call "silhouette bleeding", which essentially bleeds-out colour from the peripheries of an alpha-channel outward, so the texture can be mipped without the black "background" causing trouble at lower mip-map stages, whic...
by LDAsh
2019-02-15T17:22:31-07:00
Forum: Users
Topic: Adjusting 8bit to 'level' and compose properly into 16bit range
Replies: 6
Views: 2182

Re: Adjusting 8bit to 'level' and compose properly into 16bit range

Ugh, I was under the impression I needed to use a combination of white AND gamma, but actually I only needed white-point, which indeed works out to 800%! I did learn a lot about other ways of adjusting colours and brightness by reading and playing with everything else, at least. :P Still not sure ho...
by LDAsh
2019-02-15T10:58:17-07:00
Forum: Users
Topic: Adjusting 8bit to 'level' and compose properly into 16bit range
Replies: 6
Views: 2182

Re: Adjusting 8bit to 'level' and compose properly into 16bit range

I will look into those different approaches, but really the issue I'm having is the division itself. So far I am using "-level 0%,282.85%,0.5", which takes that 255/65536 gray and makes it just shy of 8192, according to identify. I have no idea why it's that percentage, but that's what I whittled it...
by LDAsh
2019-02-15T09:39:58-07:00
Forum: Users
Topic: Adjusting 8bit to 'level' and compose properly into 16bit range
Replies: 6
Views: 2182

Adjusting 8bit to 'level' and compose properly into 16bit range

This is more of a hypothesis looking for advice than an issue, since I'm not even sure where to begin... I'm wanting to take a heap of grayscale 8-bit images and layer them on top of each other by using 'compose add' into a 16-bit grayscale, but I want to make sure those 256 colours are a consecutiv...
by LDAsh
2019-02-11T06:31:45-07:00
Forum: Users
Topic: [SOLVED]: Resizing/Cropping based on info from another image
Replies: 2
Views: 1771

Re: Resizing/Cropping based on info from another image

Wow, too awesome. Got the resize and crop happening, and figured out how to separate the X and Y values all by myself. I guess I can just do ~unlimited values for and from whatever I want, it seems, anything I can get out of identify and into anything that can be fed a number. You've just helped me ...
by LDAsh
2019-02-11T03:31:51-07:00
Forum: Users
Topic: [SOLVED]: Resizing/Cropping based on info from another image
Replies: 2
Views: 1771

[SOLVED]: Resizing/Cropping based on info from another image

Leading on from this topic:- https://imagemagick.org/discourse-server/viewtopic.php?f=1&t=35471 and very similar to concepts discussed here:- https://www.imagemagick.org/discourse-server/viewtopic.php?t=33209 Although, the condition is that it's simply a Windows BAT file and using IM6, would not inv...
by LDAsh
2019-02-11T02:47:23-07:00
Forum: Users
Topic: [SOLVED]: Composition clipping/clamping
Replies: 9
Views: 2923

Re: [SOLVED]: Composition clipping/clamping

Oops, a new side-issue surfaced from this, I only just realised... When using an image that is a different proportion, the output is the larger image. Strangely this is different from using "subtract", "add" or "darken", it only happens with "minus". I tried using "+swap" as suggested, but the same ...
by LDAsh
2019-02-10T23:45:39-07:00
Forum: Users
Topic: [SOLVED]: Composition clipping/clamping
Replies: 9
Views: 2923

Re: Composition clipping/clamping

Sorry, I just edited my post and indeed your suggestion solved the issue. Thanks! :)
by LDAsh
2019-02-10T23:40:29-07:00
Forum: Users
Topic: [SOLVED]: Composition clipping/clamping
Replies: 9
Views: 2923

Re: Composition clipping/clamping

"Version: ImageMagick 6.9.0-1 Q16 x86 2014-12-22" I need to use this version because it's the latest that my XP single-core machine will run, as far as I can remember. "convert img.png ref.png -compose subtract -composite -negate out.png" I still suspect I need "-set option:compose:clamp=on" (or is ...
by LDAsh
2019-02-10T08:37:28-07:00
Forum: Users
Topic: [SOLVED]: Composition clipping/clamping
Replies: 9
Views: 2923

[SOLVED]: Composition clipping/clamping

I'm having trouble using "compose", particularly "subtract" with 2 images. It seems that when black is subtracted from black, it cycles those pixels through to white again. In Paint Shop Pro, I get the same result in the "arithmetic" (subtract) method by unchecking the "clip color values" option. Ot...