Perspective Distortion by command line doesn't works

[sabater_wb]

I'm trying to run the code bellow in the windows xp prompt:

"convert image.jpg -matte -virtual-pixel transparent -distort Perspective '0,0,0,0 0,262,0,262 240,0,240,37 240,262,240,237' result.png"

but I got this error:

convert: invalid argument for option '-distort ': '0,0,0,0, @ convert.c/ConvertImageCommand/1167

but in a linux server it runs perfect
exec("convert image.jpg -matte -virtual-pixel transparent -distort Perspective '0,0,0,0 0,262,0,262 240,0,240,37 240,262,240,237' result.png");

[Bonzo]

Try changing the ' to "

[anthony]

See also IM Examples, APIs, Scripting, Building, Windows DOS Batch Scripts

[sabater_wb]

thank you Bonzo.
It worked.

[sabater_wb]

I tryed it. Its working, but the result lost quality, and I need to add the paramter -unsharp 0x1 to the result be a few better.

Do you know if there are another way to save with a better quality ? because -unsharp 0x1 is not so good.

[fmw42]

By default -distort perspective uses elliptically weighted area filtering to avoid aliasing artifacts. But you can use other filters using the -filter setting. To turn off filtering use -filter point. To use the best non-area filter, try -filter lanczos.

See

http://www.imagemagick.org/script/comma ... php#filter
http://www.imagemagick.org/Usage/resize/#filter
http://www.imagemagick.org/Usage/distorts/#distort