ofImage resize affect image colour

Why the colour of my ofImage is affected including the alpha channel when I resize it?

I’m not sure that ofEnableAlphaBlending(true) will contribute to it.

How to preserve and retain all of ofImage properties except it’s dimension when I call resize() method?

Is it a FreeImage feature/bugs or overall a openFrameworks feature/bugs?

[attachment=0:23hk1mco]ofImageResizeErr.jpg[/attachment:23hk1mco]

Have you tried this fix ?
http://forum.openframeworks.cc/t/strange-ofimage-resizing-behaviour/1419/0

it worked for me!