Search found 7 matches

by olidem
2017-12-11T03:34:19-07:00
Forum: Users
Topic: Alpha multiplying broken since upgrade to 7.x
Replies: 14
Views: 1260

Re: Alpha multiplying broken since upgrade to 7.x

Ah, so I found a bug :-D Should I file a bug report somewhere?

Another thing: still you all first refer to the 6.x version. Is there any reason why people are migrating to slowly to 7.x?

Anyway, the dstin-workaround seems to work (I still do not know why).

Thank you all for your help!
by olidem
2017-12-10T08:50:57-07:00
Forum: Users
Topic: Alpha multiplying broken since upgrade to 7.x
Replies: 14
Views: 1260

Re: Alpha multiplying broken since upgrade to 7.x

Wooohoooo! GeeMack Great! In fact, dstin did the job!

But can somebody explain this? Why is multiply not the correct operator????
by olidem
2017-12-10T03:51:16-07:00
Forum: Users
Topic: Alpha multiplying broken since upgrade to 7.x
Replies: 14
Views: 1260

Re: Alpha multiplying broken since upgrade to 7.x

Well as I said, on IM 6.x it even worked without the +channel.

But my installation was upgraded to 7.x, and not it does not work anymore, neither with nor without the +channel.

This is my result: https://imgur.com/2yiOmu3
by olidem
2017-12-07T23:25:02-07:00
Forum: Users
Topic: Alpha multiplying broken since upgrade to 7.x
Replies: 14
Views: 1260

Re: Alpha multiplying broken since upgrade to 7.x

IM 7 magick logo: \( -size 640x480 gradient: \) -alpha off -compose copy_opacity -composite tmp.png Well, my gradient is some hand-drawn custom shape, and as far as I understand your command, this would create a generic gradient? And if you look at my uploaded pictures, I really want a pixelwise mu...
by olidem
2017-12-07T23:19:21-07:00
Forum: Users
Topic: Alpha multiplying broken since upgrade to 7.x
Replies: 14
Views: 1260

Re: Alpha multiplying broken since upgrade to 7.x

Ok, this is the test-gradient.pgn (I hope it did not destroy alpha channel by uploading) https://imgur.com/v7BggBK Then this is the tmp.png https://imgur.com/v6tNBHF Both images do have an alpha channel with transparent regions, and I want to combine them, i.e. let the image of the woman fade to tra...
by olidem
2017-12-07T09:00:09-07:00
Forum: Users
Topic: Processing whole directories of images
Replies: 3
Views: 410

Re: Processing whole directories of images

Uuu-ha :) You're struggling less with imagemagick than with windows batch scripting ! I'd recommend learning some powershell commands... http://www.computerperformance.co.uk/powershell/ another hint is mogrify, which is meant for batch processing (without writing the loops yourself). But in the end ...
by olidem
2017-12-07T05:06:15-07:00
Forum: Users
Topic: Alpha multiplying broken since upgrade to 7.x
Replies: 14
Views: 1260

Alpha multiplying broken since upgrade to 7.x

Hi, I used to combine one PNG image (with transparent pixels) with another matting image (to blend the image to transparent at the bottom). This command worked fine with IM 6.x convert tmp.png test-gradient.png -channel A -compose Multiply -composite out.png Now, I am just getting an almost white im...