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Convert tall image into a small with effect
Posted: 2013-10-23T21:04:10-07:00
by semptrion
Hi, I have a tall image and I need to convert into a small copyng the top and the base and putting an effect of break image, preserving top and bottom of image.
(Sorry for my English... but an image is like a thousand of words)
Thanks in advance
Re: Convert tall image into a small with effect
Posted: 2013-10-23T21:13:41-07:00
by fmw42
You need to do something like:
1) crop the top and bottom parts (-crop)
2) make a mask with the jagged outline on the top and another for the bottom (-draw)
3) composite each mask with the image with a transparent background (-compose ... -composite)
4) add shadows and possibly transparent borders (-shadow, -splice)
5) append the images (-append)
variations of order and other commands may produce the same kind of results.
see
http://www.imagemagick.org/script/comma ... ptions.php
http://www.imagemagick.org/Usage/
Please identify your version of IM and platform.
If you need further help, please supply a separate image for the input (not a combination of the two in one image)
Re: Convert tall image into a small with effect
Posted: 2013-10-24T08:46:46-07:00
by snibgo
It's an interesting example of combining a number of processes towards a single effect. Here's a Windows script that follows fmw42's steps, though not exactly. It creates sample.png, but this might be a page scan or whatever, then applies the processes, resulting in cutout_shad.png. All the convert commands could be combined into one, without all the intermediate files.
Code: Select all
%IM%convert -size 1000x6000 gradient:red-blue sample.png
%IM%convert ^
-size 1000x100 xc: ^
-draw "path 'M0,50 L333,99 L666,0 L999,50 L999,99 L0,99 Z'" ^
cutout_mask.png
%IM%convert ^
sample.png ^
( -clone 0 -gravity North -crop 1000x200+0+0 +repage -write cutout_Top.png ) ^
( -clone 0 -gravity South -crop 1000x200+0+0 +repage -write cutout_Bottom.png ) ^
NULL:
%IM%convert ^
cutout_Bottom.png ^
( +clone -fill Black -colorize 100 cutout_mask.png -negate -gravity North -composite ) ^
-alpha off ^
-compose CopyOpacity -composite ^
cutout_Bottom_cut.png
%IM%convert ^
cutout_Top.png ^
( +clone -fill White -colorize 100 cutout_mask.png -gravity South -composite ) ^
-alpha off ^
-compose CopyOpacity -composite ^
cutout_Top_cut.png
%IM%convert ^
cutout_Top_cut.png ^
( cutout_Bottom_cut.png -repage +0+150 ) ^
-background None -layers Merge ^
cutout.png
%IM%convert ^
cutout.png ^
( +clone -background Black -shadow 80x2+12+12 ) ^
-background None ^
+swap -layers Merge +repage ^
cutout_shad.png