Search found 50 matches

by TedBaker
2017-10-23T06:18:49-07:00
Forum: Developers
Topic: 6.9.9-20 and 7.0.7-8 tags
Replies: 2
Views: 6709

6.9.9-20 and 7.0.7-8 tags

I looked for the tags for latest release that matches the respective binaries v6 and v7

6.9.9-20 and 7.0.7-8

using git tag -l and they are not to found.

How do a get the code that macths the binaries 6.9.9-20 and 7.0.7-8?
by TedBaker
2017-10-21T17:38:54-07:00
Forum: Users
Topic: input Linear RGB specifiy output RGB or sRGB
Replies: 36
Views: 15492

Re: input Linear RGB specifiy output RGB or sRGB

Where are you reading your quote about linear grayscale. Here https://legacy.imagemagick.org/script/color-management.php its also on the page for latest version IM here https://imagemagick.org/script/color-management.php Normally, the conversion to separate each channel of an sRGB color image produ...
by TedBaker
2017-10-21T17:01:50-07:00
Forum: Users
Topic: input Linear RGB specifiy output RGB or sRGB
Replies: 36
Views: 15492

Re: input Linear RGB specifiy output RGB or sRGB

Thanks for your help, I studied your post, and I went thoroughly through the examples here https://legacy.imagemagick.org/script/color-management.php I thought I had it all figured out, but some of the examples don't work as expected, is this a bug with my version of IM?, I am using ImageMagick 6.8....
by TedBaker
2017-10-21T04:46:16-07:00
Forum: Users
Topic: input Linear RGB specifiy output RGB or sRGB
Replies: 36
Views: 15492

Re: input Linear RGB specifiy output RGB or sRGB

Actually I think there is more to it. -seperate seems to do the same thing. convert logo: -channel b -separate -colorspace RGB logo.tif convert logo.gif -rotate 90 -colorspace RGB linear_in_lin_out.tif convert logo.tif -set colorspace RGB -channel b -separate -rotate 90 -colorspace RGB not_what_you_...
by TedBaker
2017-10-21T03:06:11-07:00
Forum: Users
Topic: input Linear RGB specifiy output RGB or sRGB
Replies: 36
Views: 15492

Re: input Linear RGB specifiy output RGB or sRGB

Thanks combine is a real Gotcha! I spent hours trying to figure out a behaviour that just wouldn't make any sense. Until I pined it down to something to do with -sepearate, -clone, -combine. convert logo: -colorspace RGB logo.tif convert logo.tif -rotate 90 logo_rot_1.tif convert logo.tif -set color...
by TedBaker
2017-10-20T17:20:54-07:00
Forum: Users
Topic: input Linear RGB specifiy output RGB or sRGB
Replies: 36
Views: 15492

Re: input Linear RGB specifiy output RGB or sRGB

Thanks, If you start with true linear data and want to keep it linear, you should tell IM that it is linear via -set colorspace RGB, so convert image.tif -set colorspace RGB <processing> output.tif This is what I thought too: which is why I thought convert image.tif -set colorspace RGB <processing> ...
by TedBaker
2017-10-20T10:26:44-07:00
Forum: Users
Topic: input Linear RGB specifiy output RGB or sRGB
Replies: 36
Views: 15492

Re: input Linear RGB specifiy output RGB or sRGB

Will have to think about that a bit more, but I thought the fact that ifa tiff reports sRGB it didn't actually mean it was encoded non-linear. i.e. what's to stop a program writing an image stored in memory as linear straight to the tiff file without any gamma encoding. This is what I thought the tw...
by TedBaker
2017-10-20T09:46:14-07:00
Forum: Users
Topic: input Linear RGB specifiy output RGB or sRGB
Replies: 36
Views: 15492

Re: input Linear RGB specifiy output RGB or sRGB

Look at identify -verbose yourimage and see what gamma you have after conversion. If gamma=1, it is linear. If gamma=0.4545, it is non-linear. Thanks that's most helpfull, except I am not sure my input which I thought was linear is actually linear, as it reports gamma=0.4545 Also I tried the follow...
by TedBaker
2017-10-20T07:02:01-07:00
Forum: Users
Topic: input Linear RGB specifiy output RGB or sRGB
Replies: 36
Views: 15492

input Linear RGB specifiy output RGB or sRGB

I am working with liner RGB tiffs, with ImageMagick 6.8.9-9 Q16, I am trying to get my head around how IM works. My conversions follow 1 or 2 scenarios 1. linear RGB input, output should remain linear RGB for example: convert infile.tif -set colorspace RGB -rotate 90 outfile.tif I understand -set co...
by TedBaker
2017-10-20T06:00:57-07:00
Forum: Fred's Scripts
Topic: Negative2Postive linear RGB?
Replies: 1
Views: 10764

Negative2Postive linear RGB?

Am I correct, that both Negative2Postive and neg2pos, expect a gamma encoded scan i.e. sRGB as opposed to linear RGB?
by TedBaker
2017-10-20T05:10:06-07:00
Forum: Digital Image Processing
Topic: Inversion of Film Negative Discussion of technique
Replies: 3
Views: 13926

Re: Inversion of Film Negative Discussion of technique

Take a look at my unix bash shell scripts, neg2pos and negative2positive, at my link below. Thanks I did take a look at those, but my understanding of how both those scripts work, is they use the -negate to invert the image, before attempting to make a colour correction, am I correct on that point?...
by TedBaker
2017-10-19T10:39:32-07:00
Forum: Digital Image Processing
Topic: Inversion of Film Negative Discussion of technique
Replies: 3
Views: 13926

Inversion of Film Negative Discussion of technique

I have a good understanding of conventional photographic processes, can print color neg, B&W with reasonable skill etc, some limited math (should have paid attention more in class), and some basic understanding of the digital scanning processes. I am attempting to use imagemagick with some additiona...
by TedBaker
2017-10-14T02:28:04-07:00
Forum: Fred's Scripts
Topic: Enhancing multiscrop
Replies: 8
Views: 21019

Re: Enhancing multiscrop

fmw42 wrote:
2017-10-13T17:05:54-07:00
If you post your versions to Git Hub, then you need to include a page about my licensing terms.
Thanks for the reminder will contact you when I get to that stage, to ensure that I do that correctly.
by TedBaker
2017-10-13T15:47:10-07:00
Forum: Fred's Scripts
Topic: Enhancing multiscrop
Replies: 8
Views: 21019

Re: Enhancing multiscrop

Thanks for all the help! I ran a final multicrop on the single strips to create the separate frames, and that works well. I need to test it a bit more and improve my own scripts that drive the process. I can think of useful enhancement to the multicrop, to do with the -b and -c options, but I have n...
by TedBaker
2017-10-13T14:19:48-07:00
Forum: Fred's Scripts
Topic: Enhancing multiscrop
Replies: 8
Views: 21019

Re: Enhancing multiscrop

Thanks that amazing! It worked with original multicrop.

what is the difference between multicrop2 and the original? I am running imagemagick 6.8.9-9 so I will need to upgrade to use multicrop2.