Wolfgang Hugemann on wrote...
| No question this time, just praise for IM:
|
| I have just tested the newly implemented perspective distorsion feature
| and found it exactly what I need. I work in accident recontruction and
| quite often I have to map automobile damage caught in a perspectively
| distorted image onto a plan parallel taking of a car of the same make
| and model.
|
| This is very tedious work with all other programs I know in this
| respect. But with IM's new perspective distortion tool this is very
| rapid: just measure the co-ordintes of four points in the perspectively
| imperfect photo and the co-ordinates of their match points in the plane
| parallel taking and then IM do its job. Great!
|
| We used to peform this task by the help of the "-fx" operator and a
| VB-Script, but IM's calculation of the perspective correction used to
| take quite a while with this older way of proceeding.
|
| Greetings from Germany
| Wolfgang Hugemann
|
| P.S.: I will soon provide Anthony with an convincing example.
Looking back, I found the above letter in my IM mail archives,
and I was suprised that I had not recieved the "convincing example".
Hint hint, nudge nudge :-)
I have been doing programing on the -distort function, trying to
add some new items.
If you have the latest IM I have a method called 'Shepards' added
which is a Inverted Distance Weighting Distortion.
Basically you can supply anything from two to many control point
movements and the image will be distorted like you were pullyg taffy!
For example. Here I move two points way from each other
on the IM built in rose image, and a wider 'viewport' view.
convert rose: -set option:distort:viewport 120x120-25-32 \
-virtual-pixel black -distort Shepards \
'20,22.5,0,22.5 50,22.5,70,22.5'
rose_shepards.png
This is also the distort that Fred Weinhaus's "shapemorph" script
implemented to generate a linear spatical/color morph between two
images.
This weekend I hope to add code for triangular meshes for more free-form
user distortions, as well as cubic-radial distortions for camera lens
corrections.
Anthony Thyssen ( System Programmer ) <[EMAIL PROTECTED]>
-----------------------------------------------------------------------------
What goes up must come down. Ask any system administrator.
-----------------------------------------------------------------------------
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
