Need help - Picasa like straighten and -extent with centering

Hi

I am looking for two kind of conversions:
	-something like straighten in Picasa - it rotates the
picture yet crops it to the largest possible rectangle
	-something like convert -extent but the image is
centered and the background if filled with desired
color.

Thx, Andy


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Andy Leszczynski on  wrote...
| Hi
| 
| I am looking for two kind of conversions:
| 	-something like straighten in Picasa - it rotates the
| picture yet crops it to the largest possible rectangle

See  rotate examples, in  "Distorting Images"
  http://www.cit.gu.edu.au/~anthony/graphics/i
magick6/distorts/#rotate

Especially the last example, wich uses a compose to crop the
image
back to its original size after the rotation.


| 	-something like convert -extent but the image is
| centered and the background if filled with desired
| color.
| 
You can do -extent with a specific color quite simply.

Use a viewport crop (add a ! flag), to crop/extend the image
canvas to
the desired size, then 'flatten' it to fill out that
canvas with the
desired color..

   convert rose:  -crop 100x100+0+0\! \
           -background blue -flatten \
           rose_extent_blue.png

You can even offset the image on the canvas, though remember
the crop
positions the 'viewport' or window,  so the offset is for
the canvas,
NOT for the image.  EG use a negative offset for a positive
image offset

   convert rose:  -crop 100x100-20-20\! \
           -background blue -flatten \
           rose_extent_blue_offset.png

This is slowed than -extent which is designed for speed, in
resizing
images that will be completely rebuild, or the user does not
care about
what goes into any extra space.

for more info see  "Cutting and Bordering"
examples
   http://www.cit.gu.edu.au/~anthony/graphics/imagick6/cro
p/

Specifically Viewport Crop
   http://www.cit.gu.edu.au/~anthony/graphic
s/imagick6/crop/#crop_viewport


  Anthony Thyssen ( System Programmer )    <A.Thyssengriffith.edu.au>
 -----------------------------------------------------------
------------------
  Did you ever have the feeling that the world was an AC
coffee pot
  and you were DC?                -- Dean Alan Foster, ``
Glory Lane ''
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     Anthony's Home is his Castle     http://www.cit.gu.
edu.au/~anthony/
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Using ImageMagick 6.2.3 on Mac OS X 10.4.5

convert -format jpg -strip -resize 200x -sharpen 0x1
-colorspace rgb  
original.eps processed.jpg

The jpgs are getting randomly cropped. Here are two sample
images:  
http://dcrant.com/lis
t-example/

Any ideas?

Thanks,

Michael
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