Search found 10377 matches

by snibgo
2018-07-21T07:22:21-07:00
Forum: Bugs
Topic: dcraw messed up highlights
Replies: 2
Views: 33

Re: dcraw messed up highlights

This is an ImageMagick forum. Queries about dcraw should be directed elsewhere. The only patch that IM adds to dcraw is for the "-O" option.

However, in my experience, dcraw v9.27 with "-H 2" doesn't make purple skies.

I have written about dcraw and WB and clipping and contrast.
by snibgo
2018-07-20T13:56:36-07:00
Forum: Developers
Topic: What is IM's strategy for rounding floats?
Replies: 3
Views: 130

Re: What is IM's strategy for rounding floats?

I would expect that most operations that convert from float to integer will round, rather than truncate. For example:

Code: Select all

f:\web\im>%IMG7%magick -size 1199877x1 xc: -resize 0.01% info:

xc: XC 120x1 120x1+0+0 16-bit sRGB 0.203u 0:00.202
by snibgo
2018-07-20T07:05:24-07:00
Forum: Users
Topic: Maintaining DPI
Replies: 1
Views: 24

Re: Maintaining DPI

ImageMagick does preserve resolution when converting PSD files to other formats. To diagnose why your system doesn't, we need more information: - version of IM, and platform - all the scripts or other code between when the image has correct resolution and when it doesn't - sample inputs and outputs ...
by snibgo
2018-07-20T03:06:41-07:00
Forum: Users
Topic: Compare result text file size is huge
Replies: 6
Views: 135

Re: Compare result text file size is huge

If the input c:\diff.png is entirely white then the output should be empty.

Do you get any error message?

For more help, please provide a link to the input, and tell us what version of IM you are using, on what platform.
by snibgo
2018-07-19T07:22:30-07:00
Forum: Bugs
Topic: Windows installation directory
Replies: 5
Views: 2112

Re: Windows installation directory

I don't know where the fault lies. Sometimes the installation asks for the directory, and sometimes it doesn't. I don't install often enough to isolate what factors cause the problem.
by snibgo
2018-07-18T11:44:12-07:00
Forum: Developers
Topic: [MagickWand] Keep SVG background transparency when compositing
Replies: 5
Views: 76

Re: [MagickWand] Keep SVG background transparency when compositing

"-background None" tells the SVG rasterizer to make the background transparent, instead of white or whatever. So it needs to be set before rasterizing the SVG, which I suppose happens in MagickReadImageBlob().
by snibgo
2018-07-18T11:18:51-07:00
Forum: Digital Image Processing
Topic: Merging RGB and CMYK into CMYK
Replies: 1
Views: 68

Re: Merging RGB and CMYK into CMYK

Your RGB input images: are they linear RGB, non-linear sRGB, or something else? Do they have embedded profiles? Do your input CMYK images have embedded profiles? If not, why not? Using a linear RGB colorspace for scaling, rotating etc is sensible. From your comments about the Black channel of CMYK, ...
by snibgo
2018-07-18T10:34:55-07:00
Forum: Users
Topic: Download links to Windows binary releases broken?
Replies: 5
Views: 93

Re: Download links to Windows binary releases broken?

The links are to the Windows v7.0.8-7 varieties. They were broken when I tried them, but they work now. Perhaps it was a transient server problem, or an internet gremlin.
by snibgo
2018-07-18T01:47:43-07:00
Forum: Users
Topic: Download links to Windows binary releases broken?
Replies: 5
Views: 93

Re: Download links to Windows binary releases broken?

I confirm: the links on that page that should download IM for Windows are broken.

I expect an automated build failed, and it will be fixed in a few hours.
by snibgo
2018-07-18T01:43:17-07:00
Forum: Developers
Topic: Question about Identify failure ?
Replies: 2
Views: 55

Re: Question about Identify failure ?

The OP is spam, a copy-paste of an old post. The spammer is now banned and the thread is locked.
by snibgo
2018-07-18T01:38:18-07:00
Forum: Users
Topic: HI THERE, I HAVE A QUESTION, HELP ME?
Replies: 2
Views: 65

Re: HI THERE, I HAVE A QUESTION, HELP ME?

The OP is spam, a copy-paste of an old question. The spammer is now banned and the thread locked.
by snibgo
2018-07-17T13:32:54-07:00
Forum: Fred's Scripts
Topic: Fisheye 235° to equirectangular
Replies: 38
Views: 6150

Re: Fisheye 235° to equirectangular

Some comments that may or may not help. 1. Bash complaining about ^M (control-M) might refer to a script that contains carriage-return as well as line-fed at a line end, perhaps because a script file has been edited in a Windows editor. Cygwin bash can be told to ignore ^M. I don't know about other ...
by snibgo
2018-07-17T08:03:59-07:00
Forum: Fred's Scripts
Topic: Fisheye 235° to equirectangular
Replies: 38
Views: 6150

Re: Fisheye 235° to equirectangular

@jumpjack: Fred's script uses the "bc" command. But you don't have it. So Fred's scripts won't work, and you get errors because variables that should have been set by bc haven't been.

Whichever variety of bash you use, if you don't have the tools that scripts expect, they won't work.
by snibgo
2018-07-16T05:22:42-07:00
Forum: Users
Topic: Possible to detect compression artifacts?
Replies: 1
Views: 68

Re: Possible to detect compression artifacts?

Is there a way to measure with a command line program the "amount of artifacts" or "quality" of jpg images? Interesting question. If you have an uncompressed source, and two jpegs made from that source, we can find which jpeg is closest to the source eg by comparing RMSE. When we have JPEGs with no...
by snibgo
2018-07-16T05:01:28-07:00
Forum: Users
Topic: Compare result text file size is huge
Replies: 6
Views: 135

Re: Compare result text file size is huge

Writing to "txt:" output always gives all of the pixels. In your case, the black pixels are the same in both inputs, so you can process the output in an external filter (such a grep, or Windows findstr) to remove those pixels. Another option is to make black pixels transparent ("-transparent black")...