[magick-users] creation of a image swatch question

[Anthony Thyssen]

"John Smith" on  wrote...
| Hello again, ... thank you, that is wonderful.  There were lots of very
| good examples and I had fun playing around with the tutorial. May I ask,
| there is one I would like to see, but didn't get a feel from the tutorial
| on how to do it.  How could one make a checkerboard pattern, like the
| example under this line on that page: [[ If you want color the "checkerboard"
| pattern, that is best done by first using "-normalize" to map the the two
| greys to black and white, before substituting those two colors. ]] ....
| but have each smaller tile of the checkerboard be a random color?  Not
| quite like noise where its a spatter of colors, but perfectly aligned
| cubes each a different color, ... all tiled together neatly :) best
| wishes, Ant Lamp 
| 

For random colors, that is much harder!!!  You will need some type of
loop to either generate each square, OR to re-color each square.

The former is probbaly a lot easier!

Something like this under unix BASH shell....

   for i in `seq 1 256`; do
     R=$((RANDOM%255))
     G=$((RANDOM%255))
     B=$((RANDOM%255))
     convert -size 10x10 xc:"rgb($R,$B,$G)" miff:-
   done | montage -mode Concatenate - random_colors.gif

This generates 256 random colors (in RGB space), each a 10x10 square
The numbers are generated using the Bash random number generator.

It then 'pipelines' all the images into a "montage" to 'concatenate'
them all together in a 16x16 square image.


  Anthony Thyssen ( System Programmer )    <A.Thyssen at griffith.edu.au>
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