Hello everyone, I'm writing to check whether the commands, whick convert a jpeg "444" picture to "RGB", "420" and "422" formats, are correct.
#from YUV colorspace to RGB colorspace convert -colorspace RGB Pic_444.jpg Pic_RGB.jpg convert -sampling-factor 2x1,1x1,1x1 Pic_444.jpg Pic_422.jpg convert -sampling-factor 2x2,1x1,1x1 Pic_444.jpg Pic_420.jpg Thank you for your help. Zhaoyang GUO -- Sigma Designs Europe 4, rue Ferrus 75014 Paris, France > > Fred Weinhaus wrote: >> In principle, just >> >> convert image.jpg -channel rgba -alpha on -colorspace yuv output.png >> >> you need png or gif for output or some format >> that will save alpha channel. But as jpg does not >> support alpha channel, you will just get an >> opaque image as the result anyway. >> >> >> see >> http://www.imagemagick.org/script/command-line-options.php#colorspace >> http://www.imagemagick.org/script/command-line-options.php#alpha >> http://www.imagemagick.org/script/command-line-options.php#channel >> http://www.imagemagick.org/Usage/basics/#alpha >> http://www.imagemagick.org/Usage/channels/ >> >> >> >> >>> Dear expertsÅC >>> >>> I'm writing to ask how to convert *.jpg picture from YUV colorspace to >>> RGBA colorspace? >>> >>> Thank you for your help. >>> >>> Zhaoyang GUO >>> >>> -- >>> Sigma Designs Europe >>> >>> 4, rue Ferrus >>> 75014 Paris, France >>> >> _______________________________________________ >> Magick-users mailing list >> [email protected] >> http://studio.imagemagick.org/mailman/listinfo/magick-users >> > > -- Sigma Designs Europe 4, rue Ferrus 75014 Paris, France _______________________________________________ Magick-users mailing list [email protected] http://studio.imagemagick.org/mailman/listinfo/magick-users
