Rotating Images in Windows XP

The exact message on the Nikon forum is found HERE < http://nikon-ikdeng.custhelp.com/cgi-bin/nikon_ikdeng.cfg/ph p/enduser/std_adp.php?p_sid=VT5xgLQg&p_lva=&p_faqid= 1281&p_created=1053015201&p_sp=cF9zcmNoPTEmcF9ncmlkc 29ydD0mcF9yb3dfY250PTEwMSZwX3NlYXJjaF90ZXh0PXJvdGF0ZSB4cCZwX 3NlYXJjaF90eXBlPTMmcF9wcm9kX2x2bDE9fmFueX4mcF9wcm9kX2x2bDI9f mFueX4mcF9jYXRfbHZsMT1_YW55fiZwX3NvcnRfYnk9ZGZsdCZwX3BhZ2U9M Q**&p_li=>.

They give explicit examples of what will damage the image, but do not explain exactly what the damage is.

Actually, with my Kodak software which gives me my own picture folders there is a funtion to rotate on right click ( windows XP ) but a warning comes up after you click on the option which tells you that your image will be degraded.

When you rotate the whole image (canvas and all) you shouldn't have any deteriation of the image, but if you rotate the image manually without rotating the canvas, you are rearranging every pixel. Remember that an image is nothing but pixels with each pixel being one of 16,777,216 colors. That doesn't change, but when you rotate manually you are also doing a resample (usually) as the width and height are not the same, so you are going to lose and perhaps not get all pixels in same order as they once were. But, all things being proper, the color of a single pixel should stay exactly the same, the resolution should stay exactly the same, whether the image is rotated on the canvas or the whole canvas is rotated. Do they say what they mean by deteriation due to rotation?

Bob