Most scaling algorithms remove alpha channel when resizing an image

*** Please report new bugs here! ***

Moderator: Dreamer

Post Reply
damian101
Posts: 9
Joined: Fri Dec 22, 2017 12:43 am

Most scaling algorithms remove alpha channel when resizing an image

Post by damian101 »

With scaling methods Hermite, Gaussian, Bell, BSpline, Mitchell, Lanczos and Hanning the alpha channel gets removed when resizing an image.
Only Nearest Neighbor and Bilinear work as expected and preserve the alpha channel.
User avatar
xnview
Author of XnView
Posts: 34644
Joined: Mon Oct 13, 2003 7:31 am
Location: France
Contact:

Re: Most scaling algorithms remove alpha channel when resizing an image

Post by xnview »

i can't reproduce, could you send me a sample image?
Pierre.
Post Reply