Legacy ImageMagick Discussions Archive

Bonzo wrote:Try:

Code: Select all

convert input.jpg -gravity southeast -crop 30x30+0+0 +repage output.jpg

it works ,thank you very much!

I can not find any parameter to cut an img from the reverse direction from
http://www.imagemagick.org/Usage/crop/

how to do that?

h=$((100*243/360))
s=66
echo "h=$h; s=$s"
convert -size 100x100 gradient:"#b3b3b3-#0897ef" -colorspace hsl \
-channel r -evaluate set $h% +channel -channel g -evaluate set $s% \
+channel -colorspace rgb tmp6.png

this is good enough

yes , great , that is what i want .
Thank you very much.

1,i firstly ceate the #b3b3b3-#4d4d4d gradient in photoshop (ie:a.png) 2,then use Hue/Saturation tool to get some random color to get the colorize gradient (ie:b_gd.png) 3,the i pick the top color of the colorize gradient (ie:0897ef),and paste a square to get the pure color (ie:b.png) my thinking is...

the b_gd.png is created approximately in photoshop. the theory is similar with -modulate convert; http://i532.photobucket.com/albums/ee323/linjuming/questions/1-12.png and similar with Hue/Saturation in photoshop ,but select the colorize option. http://i532.photobucket.com/albums/ee323/linjuming/que...

if the original color is not gray ,can use this method to do: (modulate convert ,why the result is not the same color?) http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=19044 when the original color is gray ,the hsl (h=0,s=0,l=x) is not suitable for "hue/hue" compare ,th...

you cannot create an image with a checkerboard to represent transparent and have the checkerboard removed when you overlay the gradient on some image. PS has two kinds of transparency -- background (shown as checkerboard) and alpha channel. IM only uses alpha channel transparency. Thus if you just ...

o no ,you misunderstand the transparent for pattern:checkerboard,they are transparent,not checkbord.

my purpose is to create the transparent png with the same preview effect what output with photoshop. the im created png in my pc is transparent (can see the third img below) ,but can not see the transparent in lister. not the same preview with ps-done png. not very serious problem ,can use in html w...

thank you, it seems not so perfect for windows .

not easy to understand , but good to use . Thank you very much !

cmd: convert -size 10x250 gradient:black-none -fill #143fae -sigmoidal-contrast 6,50% -colorize 100% 3_me.png not the same? very strange http://i532.photobucket.com/albums/ee323/linjuming/questions/1-5.png http://i532.photobucket.com/albums/ee323/linjuming/questions/2-3.png ps: the 3.png from wireho...

my vesion is the latest vesion 6.7.0 q16