On Fri, 1 May 2009 11:36:07 +0200 Jan Martin <[email protected]> wrote:
| Hello Anthony, | | this is what I call really excellent support! | | I looked at | http://www.imagemagick.org/script/changelog.php | and couldn't find anything regarding your changes. | | Where to find the most up-to-date changelog and source? | Where to download? | It is the SVN repository. However be warned that sometimes people upload something that is not quite complete, and upload a fix or other changes a few minutes later. See http://www.imagemagick.org/script/subversion.php | Where to download for 32 bit Ubuntu 9.04 Linux? | I case I need to install from source, what files to download exactly? | | Then to follow "Install from Unix source"? | http://www.imagemagick.org/script/install-source.php | As you are using ubuntu you may need to install from either SVN download or a tar file. I know how to generate Source RPM's from the source directory and from that the normal RPM's http://www.imagemagick.org/Usage/api/#building But I have no instructions or idea how to generate DEB packages such as used by Ubuntu. It would be nice to know, and record, but I don't know. There is still a bug in the handling of the 'angles' for depolar, which my last example... | > convert testimage2_diagram.jpg -virtual-pixel black \ | > -write show: \ | > +distort depolar '212,35 212.5,212.5 135,225' \ | > -write show: \ | > +distort polar '212,35 212.5,212.5 135,225' \ | > show: | > Can demonstrate (when you get the updates): the lake is extracted and when 'polar' distorted it goes to the top as specified. That is the depolar gets the angles wrong, though it does get it right for -180,180 (the default). I will work on that another time. | Regarding your questions: | | Not sure if you added a picture after | > "convert testimage2_diagram.jpg +distort depolar '212.5,35' -rotate 180 | show:" | At least I did not receive one using gmail online interface. | No I did not send one. The mailing list will not carry images in any case. If I can find a smaller image with better indications for angles (more differences around the ring), then I will add examples to IM Examples for using Rmin and angles. | > QUESTION: Are prople happy with 0 angle being straight down, | > and the default 'cut point' for the ring being straight up? | > Or would they prefer a different set of angles? | | Don't know, I am just doing this for 3 days altogether. | My best guess is to look how its done in other commands, and stay with that | way to have it all work the same way. Maybe there are standards to follow? | I think the angles were chosen to fit 'polar' distort better, For example convert -pointsize 20 label:Anthony -virtual-pixel gray \ +distort polar '100,80 0,0 -45,45' \ -trim +repage show: will produce a 'smile like arc' on a grey background. | Other thing is to make sure nothing breaks in MagickWand, MagickCore, | PerlMagick, Magick++ or peoples scripts etc. | | My best gues is to just leave it as it is now. | It shouldn't those just pass arguments to the DistortImages() function, exactly as the command line API does. I doubt it will break until I start adding trianglular and grid mesh distortions. | > WARNING: this test image is NOT perfectly centered! | > | > It is also NOT a polar distortion, but a spherical image. | > | > The depolar image would need some serious cylindrical de-distorting to | > remove the vertical compression at the top and bottom of the image, so as | > to have it look reasonally 'normal' | | | I am new to this. Please point me into the right direction. | That image was taking with a 320 degree fish eye lens to get an image in just about every direction all at once. It is spherical. Polar distorted image is really a cone shaped image, not spherical. It is hard to describe actually. | Given that I know roughly where the doughnut hole is, is there a way to get | the EXACT center of the doughnut automatically by analysing the black | doughnut hole? | Or whatever method? | No idea actually. | How would you approach the "serious cylindrical de-distorting"? | Use another command instead of depolar? If so, which? | Or how to "de-distorting"? | There is a major discussion of cylindrical distortions (wrapping a image onto a cylinder such as a can). In the IM discussion forum. Anthony Thyssen ( System Programmer ) <[email protected]> ----------------------------------------------------------------------------- Science, technology, and biology all use the woven rope of reality. Magic, on the other hand, functions by reweaving the fabric of reality. -- Margret Weis & Tracy Hickman - "Dragon Wing" ----------------------------------------------------------------------------- Anthony's Home is his Castle http://www.cit.gu.edu.au/~anthony/ _______________________________________________ Magick-users mailing list [email protected] http://studio.imagemagick.org/mailman/listinfo/magick-users
