Search found 168 matches

by pipitas
2015-01-14T11:08:18-07:00
Forum: Developers
Topic: New image format BPG -- something for ImageMagick to support?
Replies: 6
Views: 9718

New image format BPG -- something for ImageMagick to support?

There is a new image file format named BPG ( "Better Portable Graphics" ), developed by Fabrice Bellard (famous for QEMU amongst other things). It supports metadata, alpha channel as well as animations. Here are some infos: http://bellard.org/bpg/ Here is the spec: http://bellard.org/bpg/bpg_spec.tx...
by pipitas
2015-01-13T06:22:25-07:00
Forum: Users
Topic: Remove centered white-transparent Watermark - no copyright infrigment
Replies: 25
Views: 15928

Re: Remove centered white-transparent Watermark - no copyright infrigment

snibgo wrote:In Windows cmd, the escape character is caret ^ not backslash \. If cmd sees "\(", it treats these as normal characters and passes them to convert, which looks for an image named "\(".
Thanks for this clarification, snibgo!
by pipitas
2015-01-12T16:31:48-07:00
Forum: Users
Topic: Remove centered white-transparent Watermark - no copyright infrigment
Replies: 25
Views: 15928

Re: Remove centered white-transparent Watermark - no copyright infrigment

... all the code can usually be taken literally UNTIL the next "apostroph", no need for escaping. It's already the code itself , that needs the escaping. Even if you wouldn't use PHP, but would type the command into a terminal window running a shell, you'd need blanks around the parentheses backsla...
by pipitas
2015-01-08T13:02:36-07:00
Forum: Developers
Topic: Are "stroke width transform" and novel "bandlet-based edge detector" something IM could use for text detection in image?
Replies: 1
Views: 3089

Are "stroke width transform" and novel "bandlet-based edge detector" something IM could use for text detection in image?

Here is an interesting paper I came acrosss:

http://www.bmva.org/bmvc/2012/BMVC/pape ... per063.pdf

It discusses the use of SWT (stroke width transform) with a novel "bandlet-based edge detector" in order to localize text occurances within images.
by pipitas
2015-01-07T14:10:55-07:00
Forum: Bugs
Topic: EPS conversion aborted
Replies: 28
Views: 19622

Re: EPS conversion aborted

checking for Ghostscript... [....] checking for gs PS writing device... ps2write checking for gs EPS writing device... Unknown device: epswrite [....] Do you know what that means ? While my earlier post http://www.imagemagick.org/discourse-server/viewtopic.php?f=3&t=26728#p118567 in the current thr...
by pipitas
2015-01-06T13:38:31-07:00
Forum: Developers
Topic: Bloom filters and ImageMagick?
Replies: 0
Views: 3368

Bloom filters and ImageMagick?

Has the concept of exploring bloom filters for image processing (for example to find sub-images in larger ones) ever been explored in relation to ImageMagick?
by pipitas
2015-01-05T15:59:15-07:00
Forum: Bugs
Topic: EPS conversion aborted
Replies: 28
Views: 19622

Re: EPS conversion aborted

dlemstra wrote:I just submitted a patch to our SVN repository to report the Ghostscript library version when an exception is raised or with -verbose:
Very useful addition, thanks a lot!
by pipitas
2015-01-05T08:59:37-07:00
Forum: Bugs
Topic: EPS conversion aborted
Replies: 28
Views: 19622

Re: EPS conversion aborted

The new replacement devices are called ps2write and eps2write . These generate the more efficient PostScript Level 2. Is ImageMagick aware of these changes, when installing/defining delegates? We are talking about reading a pdf file not writing. Not sure what this has to do with this topic. You are...
by pipitas
2015-01-05T06:26:41-07:00
Forum: Bugs
Topic: EPS conversion aborted
Replies: 28
Views: 19622

Re: EPS conversion aborted

Ghostscript developers have deprecated the two traditional devices pswrite and epswrite quite a while ago. These used to generate PostScript Level 1. I'm not sure if they already completely removed support for these in Ghostscript v9.15 (that you seem to be using). The new replacement devices are ca...
by pipitas
2015-01-02T16:06:28-07:00
Forum: Users
Topic: Using ImageMagick to process fingerprint photos
Replies: 10
Views: 12064

Re: Using ImageMagick to process fingerprint photos

try prefiltering with either -kuwahara or -mean-shift and vary the sizes I tried filtering with '-kuwahara' already before -- however not pre -filtering, but filtering what my current result is. I do not see any advantage when pre -filtering with kuwahara, having now tried it as per your suggestion...
by pipitas
2015-01-02T13:13:14-07:00
Forum: Users
Topic: Using ImageMagick to process fingerprint photos
Replies: 10
Views: 12064

Re: Using ImageMagick to process fingerprint photos

try this convert fingerprint-1024x575.jpg -colorspace gray -auto-level -gamma 0.3 -enhance -equalize -negate -lat 20x20+10% -negate fingerprint_result.gif Thank you, Fred. I tried to add '-auto-level' , '-enhance' , '-equalize' and various variations of '-gamma' to the commands for my new pictures....
by pipitas
2015-01-02T13:08:35-07:00
Forum: Users
Topic: Using ImageMagick to process fingerprint photos
Replies: 10
Views: 12064

Re: Using ImageMagick to process fingerprint photos

Here are two real-world fingerprint photos (showing the same finger from different angles and distances) which I'm now trying to tame: http://i.stack.imgur.com/XFKU9.jpg http://i.stack.imgur.com/vlGab.jpg Currently I've arrived at these two commands: convert \ http://i.stack.imgur.com/XFKU9.jpg \ -a...
by pipitas
2015-01-02T12:35:38-07:00
Forum: Users
Topic: Using ImageMagick to process fingerprint photos
Replies: 10
Views: 12064

Re: Using ImageMagick to process fingerprint photos

Deskewing would be harder: find the finger's edge, find the least-curved part of that, and this defines the angle (in this case, roughly south-west to north-east). Not very hard (Windows BAT script): %IM%convert fingerprint-1024x575.jpg ^ -threshold 20%% ^ -canny 0x1+10%%+30%% ^ -background none -f...
by pipitas
2015-01-01T13:50:15-07:00
Forum: Users
Topic: Using ImageMagick to process fingerprint photos
Replies: 10
Views: 12064

Re: Using ImageMagick to process fingerprint photos

"-lat" does a good first cut, I'd say. convert fingerprint-1024x575.jpg -colorspace gray -lat 15x15+0 fl.png Whoahhh! That's already a pretty good approximation! (I had thought that getting the lines in black and white would be the most difficult part...) I haven't used or played with local adaptiv...
by pipitas
2015-01-01T07:56:04-07:00
Forum: Users
Topic: Using ImageMagick to process fingerprint photos
Replies: 10
Views: 12064

Using ImageMagick to process fingerprint photos

The background for this question are the following (and some related) news stories, which made headlines world wide in recent days: http://www.geek.com/apple/bypassing-touch-id-with-a-phony-fingerprint-could-be-as-simple-as-taking-a-photo-1612511/ http://world.news-round.com/secretary-of-defense-hac...