JPEG 2000 output can range from mathematically lossless to "extremely" lossy.fmw42 wrote:... except JP2000 is a lossless compression.
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- 2010-08-07T00:29:15-07:00
- Forum: Users
- Topic: JPEG2000 Compressed TIFF problem
- Replies: 7
- Views: 19666
Re: JPEG2000 Compressed TIFF problem
- 2010-08-07T00:26:39-07:00
- Forum: Users
- Topic: JPEG2000 Compressed TIFF problem
- Replies: 7
- Views: 19666
Re: JPEG2000 Compressed TIFF problem
I don't know if ISO 12369:2004 (Tag image file format for image technology) allows for JPEG 2000 compression. Pretty sure, though, that next to no TIFF apps would.footnoter wrote:I am trying to compress a TIFF file but selecting JPEG2000 compression leaves the file uncompressed
- 2010-07-22T13:56:00-07:00
- Forum: Users
- Topic: Internal bit depth and -depth operator
- Replies: 7
- Views: 15822
Re: Internal bit depth and -depth operator
2 very interesting threads I had missed completely, thanks.
- 2010-07-21T04:40:27-07:00
- Forum: Users
- Topic: Internal bit depth and -depth operator
- Replies: 7
- Views: 15822
Re: Internal bit depth and -depth operator
In cinemaslides there are a number of ops performed in quasi-linear light (between an approximate gamma decode and a final encode). When the issue came up (hard banding in low-light zones) I tried to isolate the culprit op. Turned out the order of -gamma <encode> and -depth makes all the difference....
- 2010-07-20T22:46:58-07:00
- Forum: Users
- Topic: Internal bit depth and -depth operator
- Replies: 7
- Views: 15822
Re: Internal bit depth and -depth operator
I'm getting the same results with 6.5.7-8 2009-11-26 Q16 (Ubuntu 10.04's default IM) and 6.6.3-0 2010-07-13 Q16
Does -depth truncate/pad or map?
Does -depth truncate/pad or map?
- 2010-07-20T14:08:42-07:00
- Forum: Users
- Topic: Internal bit depth and -depth operator
- Replies: 7
- Views: 15822
Internal bit depth and -depth operator
I'm using ImageMagick in cinemaslides (http://github.com/wolfgangw/digital_cinema_tools/blob/master/cinemaslides) to conform, resize, recolor etc. images and to create DCP slideshows. Chasing an issue with image quality degradation (with rather dark zones/material) I wondered what's going on here (s...
- 2010-06-11T14:16:41-07:00
- Forum: Users
- Topic: identify -- XML dummy -- magic says SVG
- Replies: 13
- Views: 25930
Re: identify -- XML dummy -- magic says SVG
Fred, I will test rsvg output. I can't steer off the target platform too far, though. cinemaslides already is an exotic little bugger. But I think now I have some sort of a handle on this.
Thanks for your advice and suggestions.
Thanks for your advice and suggestions.
- 2010-06-10T15:57:29-07:00
- Forum: Users
- Topic: identify -- XML dummy -- magic says SVG
- Replies: 13
- Views: 25930
Re: identify -- XML dummy -- magic says SVG
Ubuntu's IM (6.5.7-8 2009-11-26 Q16) doesn't:
Thanks for the hints
Code: Select all
$ convert -list configure | grep DELEGATES
DELEGATES bzlib djvu freetype gvc jpeg jng jp2 lcms openexr png tiff x11 xml wmf zlib
- 2010-06-10T14:03:48-07:00
- Forum: Users
- Topic: identify -- XML dummy -- magic says SVG
- Replies: 13
- Views: 25930
Re: identify -- XML dummy -- magic says SVG
Neat, but not quite, I think: $ cat resistor.svg | grep -v '<!--' <?xml version="1.0" encoding="UTF-8"?> <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ev="http://www.w3.org/2001/xml-events" version="1.1...
- 2010-06-10T13:15:27-07:00
- Forum: Users
- Topic: identify -- XML dummy -- magic says SVG
- Replies: 13
- Views: 25930
Re: identify -- XML dummy -- magic says SVG
Makes sense. Thanks. With a slideshow DCP glue tool I'm writing (http://wiki.github.com/wolfgangw/digital_cinema_tools/cinemaslides) I want to be able to say $ cinemaslides * in dirs that have decodable files and non-decodable files, skipping the latter. So, apart from the SVG/XML dummy example is t...
- 2010-06-10T12:13:42-07:00
- Forum: Users
- Topic: identify -- XML dummy -- magic says SVG
- Replies: 13
- Views: 25930
identify -- XML dummy -- magic says SVG
$ cat xml
<?xml version="1.0" encoding="UTF-8"?>
<test/>
$ identify -format "%m" xml
SVG
and that is just wrong, isn't it? Wouldn't you want to at least check for <svg>?
<?xml version="1.0" encoding="UTF-8"?>
<test/>
$ identify -format "%m" xml
SVG
and that is just wrong, isn't it? Wouldn't you want to at least check for <svg>?
- 2010-05-31T22:39:03-07:00
- Forum: Developers
- Topic: No file magic for truetype files?
- Replies: 5
- Views: 12044
Re: No file magic for truetype files?
Thanks. Works. Should've RTFM.
- 2010-05-30T23:08:43-07:00
- Forum: Developers
- Topic: No file magic for truetype files?
- Replies: 5
- Views: 12044
Re: No file magic for truetype files?
Fred, yes, obviously. I tend to think that IM's display of fonts should be aligned with the behaviour for image files (where suffixes are not relevant for finding the right delegate and file magic is used instead. But then again, maybe it's done differently?)
- 2010-05-30T11:30:06-07:00
- Forum: Users
- Topic: OCR and specific regions
- Replies: 5
- Views: 11906
Re: OCR and specific regions
tesseract is quite ok. Here's what it outputs from a screenshot of this thread: $ tesseract tesseract:Error:Usage:tesseract imagename outputbase [-l lang] [configfile [[+|-]varfile]...] $ tesseract english.tif text -l eng $ cat text.txt --- OCR and specific regions POSTFIEPLY Ié io Search this topic...
- 2010-05-30T11:14:47-07:00
- Forum: Developers
- Topic: No file magic for truetype files?
- Replies: 5
- Views: 12044
No file magic for truetype files?
$ display /usr/share/fonts/truetype/freefont/FreeMono.ttf (displays font summary) $ cp /usr/share/fonts/truetype/freefont/FreeMono.ttf foo $ display foo display: no decode delegate for this image format `foo' @ constitute.c/ReadImage/530. $ mv foo foo.ttf $ display foo.ttf (displays font summary) Th...