[magick-users] creation of a image swatch question

[Fred Weinhaus]

This also works and is much faster:

convert -size 16x16 xc: +noise Random -scale 1000% random_colors2.gif







>"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.