What is this feature? Since the early days of image processing, pictures get scaled. They get resized to send as EMail, resized to get ready for print or resized to make a nice background image on the desktop. But most Software make a wrong assumtion about the luminosity of the pixel data. With the data interpolation you get egdes that are too dark between areas of different colors.
You picture will look more natural when resized with the gamma correction applied. cPicture has it.
Resize this image to 50% with your Software:
Do you get this?
Then your software doesn't scale correctly.
With cPicture, you get the correct scaling using 32bit/color-channel with gamma correction: