Legacy ImageMagick Discussions Archive

not to change the contract , I only want to chage the png's opacity ,from 100% to 74% ,such as what i showed in photoshop above .but your code output a completly transparent png . Why?

original png http://i532.photobucket.com/albums/ee323/linjuming/questions/opacity-2.png code: <?php exec("convert opacity.png -matte -channel A -evaluate set 0.5 +channel laji.png"); echo "<img src='opacity.png'/>"; echo "<img src='laji.png'/>"; ?> <style type="tex...

finally i find where the problem come from.
it is the terrible bug of ie6 ,when i change to ie7 or firefox ,there is no problem at all.

Image: little.png Format: PNG (Portable Network Graphics) Class: DirectClass Geometry: 54x20+0+0 Resolution: 72x72 Print size: 0.75x0.277778 Units: Undefined Type: PaletteMatte Endianess: Undefined Colorspace: RGB Depth: 8-bit Channel depth: red: 8-bit green: 8-bit blue: 8-bit alpha: 8-bit Channel s...

i used
ImageMagick-6.7.0-9-Q16-windows-dll.exe
before.now i update to
ImageMagick-6.7.3-1-Q16-windows-dll.exe
but still the same result with old version.

http://i532.photobucket.com/albums/ee323/linjuming/questions/resize_btn_png8.png http://i532.photobucket.com/albums/ee323/linjuming/questions/resize_btn_png24.png http://i532.photobucket.com/albums/ee323/linjuming/questions/resize_btn_png32.png http://i532.photobucket.com/albums/ee323/linjuming/que...

Point Hermite Cubic Box Gaussian Catrom Triangle Quadratic Mitchell Lanczos Hamming Parzen Blackman Kaiser Welsh Hanning Bartlett Bohman i test all filter ,the result are all not good. ps ,the png is save form photoshop , and the descriptsiotn png is cut from ie6 ,show it has blue background.

the same result

orignal btn.png


description:

However I can tell you why you don't get the full result. You set hue, and saturation, but your luminance is still set to zero which is black for all hues and saturations! As such you gradient remains black!

thank you , this is the point.

<?php $color="A3E7EF"; include_once("../color_converter/color_converter.class.php"); $cc=new colorConverter; $hsl=$cc->HEX2HSL($color); $h=$hsl[0]/360*100; exec("convert 1.png -colorspace hsl " . "-channel r -evaluate set $h% +channel " . "-channel g -ev...

thank you , very good answer.

which is similar with color picker.