Puppy Linux Discussion Forum

[polle]

As I had to convert some photos and didn't find a pet package for ImageMagick I compiled it from source, first got an error about fontconfig not found, so I compiled this first, afterwards no problem compilng ImageMagick

Made a pet package of both programs if someone is interested:


http://users.telenet.be/mylinux/fontconfig-2.6.0-i486.pet
http://users.telenet.be/mylinux/ImageMagick-6.4.1-10-i486.pet

[jeffrey]

Very useful, thanks. This version has got image statistics included, so it should be relatively easy to compare a sequence of photos to detect significant changes for an intruder detection system. For example,

[KF6SNJ]

Doesn't seem off topic to me. Rather it looks like you are consider a new way to make use of Image Magick. Nothing wrong with that. In fact, it could also be useful for detecting a difference between a genuine artwork and cheap forgeries. I would like to hear a little more about that idea.

[ttuuxxx]

[amigo]

fontconfig should be considered a basic part of any GTK2 environment as many, many programs will require it.

[jeffrey]

KF6SNJ, I really don't know much more than I said yesterday. But last night I threw together a script to start testing for significant differences in photos. I'd like it to give a positive result if someone walks onto my property, but not if it's only a cat, or the sun going behind a cloud. I'll have to test that and it may take me a week or two to get around to it. In the meantime, here's my initial script. It uses Image Magick to compare two images for differences, returning an exit code of 0 if they match (or are reasonably similar), an error code of 2 if the user didn't supply two filenames, or an error code from 5 upwards depending on how different the photographs are. (I used a logarithmic scale to reduce a wide range of numbers down to something more sedate.) The log result is derived from the product of the mean of the alpha and colour channel values (which seemed to give a big number on different photos and a small number on similar ones), and values of 0 (identical photos) to 4 (roughly the same) are treated as having only minor differences, so the script returns 0 in for that range, or 5+ if the photos have more significant differences. I'm sure that this will need tuning, but it's a start. Now I need to get a Web camera and work out how long a USB connection I can run...

[cklammer]

Hi all,

When I installed IM on 4.1.2 I received a whole shitload of messages regarding a missing dependency: libbz2.so.1.0.

Turns out that I had a broken symlink with that name in /usr/lib.