Question about functions GC

[eligurwayne]

In the Alpha Channel part of the menus what doesconvert pre multiplied to non pre multiplied and the other option non pre multiplied to multiplied do to the image?In Core Image menues what does stylize / height field from mask do to the image?

[thorstenlemke]

Hi,the alpha channel issue is very technical. Normally GraphicConverter works with non-premultiplied alpha. But some cases do require that the alpha channel is already premultiplied with the color channel values.The core image effect is an Apple effect. Please refer to the Apple documentation. I just offer the existing system effects in the core image filters menu.Thorsten convert pre multiplied to non pre multiplied and the other option non pre multiplied to multiplied do to the image?In Core Image menues what does stylize / height field from mask do to the image?