Legacy ImageMagick Discussions Archive

snibgo wrote:Unless you are using VARG later, you don't need it.

True ^^'
Thanks for your help/suggest snibgo !

Ok I wrote a cleaner :
SETLOCAL ENABLEDELAYEDEXPANSION
FOR %%F IN (*.png) DO (
FOR /f %%i in ('D:\im\identify -format "%%[fx:maxima.o]" "%%F"') DO (
set VARG=%%i
IF [!VARG!]==[0] DEL %%F
)
)
The first loop is to parse all png
The second to save the result of the identify (need SETLOCAL ...

Hmm.. "2091_1429.png" is a empty tile as I explained

I tried :
identify -format "%[fx:maxima.a]" 2091_1429.png
Return me 1

And if I do a verbose it log me a correct min&max 0 alpha :
identify -verbose 2091_1429.png
Image: 2091_1429.png
Format: PNG (Portable Network Graphics)
Class ...

Hi,

I'm using ImageMagick for exporting tiles layer for map (like openstreetmap). It works well :
convert "zoom12.png" -crop 256x256 ^
-set filename:tile "%%[fx:page.x/256+2064]_%%[fx:page.y/256+1401]" ^
+repage +adjoin "%%[filename:tile].png"

But sometimes, my image ('zoom12.png' in my exemple ...