Search found 37 matches

by JoaCHIP
2018-07-22T14:16:45-07:00
Forum: Bugs
Topic: Possible bug: Not copying over all EXIF tags curing TIFF to JPEG conversion
Replies: 11
Views: 9798

Re: Possible bug: Not copying over all EXIF tags curing TIFF to JPEG conversion

This also happens when going from uncompressed TIFF to LZW compressed TIFF in Debian (ImageMagick 6.9.4-4 Q16 x86_64) and in Windows 10 (7.0.8-7 Q16 x64 2018-07-17): convert -compress lzw uncompressed.tiff compressed.tiff Example file (public domain): http://www.robotplanet.dk/f/imagick/uncompressed...
by JoaCHIP
2016-07-26T04:56:41-07:00
Forum: Digital Image Processing
Topic: Audio equalizer for images?
Replies: 14
Views: 35957

Re: Audio equalizer for images?

fmw42: That's a good idea actually. I could probably just script some stuff on top of that to give me some more intuitive controls, and then my script would generate the necessary imagemagick commands to do FFT --> apply boosts/attenuations (frequency curve response) --> inverseFFT. I'll report back...
by JoaCHIP
2016-07-18T10:43:16-07:00
Forum: Digital Image Processing
Topic: Audio equalizer for images?
Replies: 14
Views: 35957

Re: Audio equalizer for images?

@Juce: Wow, those are great. Only the third image seems to be affected by the X-Y orientation of the algorithm, but the other examples are great. Having to type in coefficients directly might scare off most users (and me too, most likely). But I guess it would be a similar operation as calculating c...
by JoaCHIP
2014-11-27T04:51:28-07:00
Forum: Users
Topic: Is JPE encoder exists?
Replies: 1
Views: 2874

Re: Is JPE encoder exists?

I think you need to rename the file to .jpg and see if this helps. Most likely it's a jpeg file, and these are usually expected to have the .jpg extension.
by JoaCHIP
2014-11-27T02:46:33-07:00
Forum: Digital Image Processing
Topic: Evaluate Blurriness/Sharpness Factor
Replies: 29
Views: 29988

Re: Evaluate Blurriness/Sharpness Factor

Oh, why did I miss this interesting discussion. I've done stuff like this using ImageMagick, and I think you might want to look into the FFT stuff. Now I'm at work atm. so I can't dive into this topic, but I believe you would be able to deduct a lot of information about blurryness from the FFT data....
by JoaCHIP
2014-11-23T11:44:32-07:00
Forum: Digital Image Processing
Topic: Audio equalizer for images?
Replies: 14
Views: 35957

Re: Audio equalizer for images?

Sorry, I almost forgot to put up the original...

Image
PS: This image is free for use by anyone, so be my guest!
by JoaCHIP
2014-11-17T14:17:31-07:00
Forum: Digital Image Processing
Topic: Audio equalizer for images?
Replies: 14
Views: 35957

Re: Audio equalizer for images?

Two more to give some more examples of the effect, now that I'm at it... : Band A: Boost: -6 dB, frequency = 50 pixels, bandwidth: medium wide Band B: Boost: +6 dB, frequency = 20 pixels, bandwidth: medium wide Band C: Boost: -6 dB, frequency = 6 pixels, bandwidth: medium wide http://www.robotplanet...
by JoaCHIP
2014-11-17T13:56:59-07:00
Forum: Digital Image Processing
Topic: Audio equalizer for images?
Replies: 14
Views: 35957

Re: Audio equalizer for images?

I've made a quick example which only shows a part of what you would be able to do with this, but because I've been using normal image processing algorithms here, I cannot easily recreate steep filters. The "slope" of these filters is most likely 6dB/octave, because they are probably 1. order filter ...
by JoaCHIP
2014-11-14T02:54:43-07:00
Forum: Digital Image Processing
Topic: Audio equalizer for images?
Replies: 14
Views: 35957

Re: Audio equalizer for images?

Your approach would indeed give a highpass filter, but it gets fairly cumbersome (not to mention slow) if you want to achieve more complex equalization this way. I was thinking of a full-featured parametric equalizer here, which means the following controls (for a 1-band version, that is): A) Boost ...
by JoaCHIP
2014-06-19T05:25:08-07:00
Forum: Digital Image Processing
Topic: Audio equalizer for images?
Replies: 14
Views: 35957

Audio equalizer for images?

Maybe this already exists, and I'm just really bad at using google, but i'll share my little idea anyway. I deal with audio a lot, and have even coded numerous plugins for that. I've often noticed the similarity between the algorithms used there and what you see in image processing. The most simple ...
by JoaCHIP
2013-11-13T11:11:51-07:00
Forum: Users
Topic: how can i convert pictures to Amiga HAM?
Replies: 1
Views: 3530

Re: how can i convert pictures to Amiga HAM?

This conversion is extremely complicated - more than JPEG, I'd dare to say. Even on the amiga itself, you get wildly different results depending on which software to use. I've tested this a lot, and I think you get the best results by using either ImageFX or Art Department Pro which are also applica...
by JoaCHIP
2012-07-22T03:49:14-07:00
Forum: Users
Topic: Free "ImageMagick Tester" app
Replies: 3
Views: 6044

Re: Usage

Fair enough, here's a quick guide:

1) Choose File / Open and load an image
2) Type this text string into the text area: -level 30,60%
3) Press Enter. The image should now change, and get more contrast.

Other text strings give other results. I've added a few examples here.
by JoaCHIP
2012-07-22T02:33:40-07:00
Forum: Users
Topic: Free "ImageMagick Tester" app
Replies: 3
Views: 6044

Free "ImageMagick Tester" app

We all know how tedious is can be to deal with long paths on the command line, and having to switch between typing in stuff, then launching a viewer to see the resulting output. So if you need to quickly figure out some adequate command line parameters, here's a little tool I just wrote, that you mi...
by JoaCHIP
2012-07-16T02:07:35-07:00
Forum: Bugs
Topic: 6.7.7 freebsd port fails install
Replies: 1
Views: 4285

Re: 6.7.7 freebsd port fails install

Not an expert here, but I think when you get these "/usr/bin/ld: warning: libpcre.so.0, needed by /usr/local/lib/liblqr-1.so, may conflict with libpcre.so.1" errors, it's a result of mixing pre-built FreeBSD packages with things you've compiled yourself, thus ending up with references to different v...
by JoaCHIP
2012-07-15T14:04:27-07:00
Forum: Bugs
Topic: IM Install Error
Replies: 13
Views: 25573

Re: IM Install Error

make ltdl/libltdlc.la CC ltdl/loaders/ltdl_libltdlc_la-preopen.lo In file included from ./ltdl/libltdl/lt__private.h:54, from ltdl/loaders/preopen.c:32: ./ltdl/libltdl/lt__glibc.h:61:18: error: argz.h: No such file or directory *** Error code 1 Stop in /root/ImageMagick. Tried doing an "svn up" but ...