Search found 8 matches

by cujsmith
2016-10-27T13:21:56-07:00
Forum: Users
Topic: Way to set reset Markers for a JPEG image.
Replies: 1
Views: 3946

Re: Way to set reset Markers for a JPEG image.

I am wondering this as well. Did you find a solution?
by cujsmith
2016-10-25T15:36:11-07:00
Forum: Magick++
Topic: sample-factor
Replies: 2
Views: 6887

Re: sample-factor

Thanks again snibgo, I got it working with defineValue.
by cujsmith
2016-10-25T09:13:41-07:00
Forum: Magick++
Topic: sample-factor
Replies: 2
Views: 6887

sample-factor

a) Is there function in Magick++ to apply desired chroma subsampling factor (like the command line "-sampling-factor")? b) Further, I understand that by default, when writing jpeg images, 4:2:0 subsampling will be applied by default up to quality factor 90; above 90, no subsampling will occur by def...
by cujsmith
2016-10-25T08:37:55-07:00
Forum: Bugs
Topic: Custom Quantization Tables using defineValue
Replies: 0
Views: 6012

Custom Quantization Tables using defineValue

Hello, I think I found a bug. It could be attributed to user error, but I think I've ruled out that possibility. The problem is in supplying a "quantization-table.xml" I wish to encode with the following QTs in a C++ program: Luminance Quantization Table 16, 12, 14, 17, 22, 30, 45, 72, 12, 13, 14, 1...
by cujsmith
2016-10-15T11:42:18-07:00
Forum: Magick++
Topic: Custom Quantization Tables
Replies: 5
Views: 7250

Re: Custom Quantization Tables

Anyone out there know how I can fix this and encode with the desired QTs?
by cujsmith
2016-10-15T10:35:17-07:00
Forum: Magick++
Topic: Custom Quantization Tables
Replies: 5
Views: 7250

Re: Custom Quantization Tables

I can't get it to work out. I am using the imagemagick supplied "quantization-table.xml" that will encode with the following QTs: Luminance Quantization Table 16, 12, 14, 17, 22, 30, 45, 72, 12, 13, 14, 17, 22, 31, 46, 74, 14, 14, 16, 19, 25, 35, 52, 83, 17, 17, 19, 23, 30, 41, 62, 100, 22, 22, 25, ...
by cujsmith
2016-10-14T09:58:42-07:00
Forum: Magick++
Topic: Custom Quantization Tables
Replies: 5
Views: 7250

Re: Custom Quantization Tables

Yes, this should do it. I'll work with it.
Thanks, Jeff
by cujsmith
2016-10-13T16:33:22-07:00
Forum: Magick++
Topic: Custom Quantization Tables
Replies: 5
Views: 7250

Custom Quantization Tables

Hello, I'm working on a C++ application and want to compress with custom quantization tables. Is there a way to do this in a C++ program? The "quality factor" function is not precise enough. And I know I can do this with the command line installation of ImageMagick but I can't find the solution for ...