Hi, may I know will auto rotation of potrait(vertical) photos by the camera affect the quality of the photo if I do not take it in RAW format?
Thanks
Thanks
I am a bit worried, cos I heard from my friends very long ago that if it is jpeg photo, it will cause the quality of the photo to decrease.
I always thought the cambridgecolour website was a very good resource.
Henessy: I think its either you heard wrongly...or your friends do not know what they are talking about. 90 degree rotations are lossless.
Read the section on "Image Rotation Example": http://www.cambridgeincolour.com/tutorials/image-interpolation.htm
But I know that if you rotate in the windows XP's photo viewer, it will definitely decrease the quality....
how does it affect the quality?
I dont think it will reduce the quality in anyway when you rotate in the photo viewer in windows. Rotation if its 90 degrees is just how the picture is being aligned. However if you rotate in software like photoshop and all and in rotations of say 5-10 degrees, there is some but pretty insignificant quality lost due to recalulation of the pixels.
IIRC, the rotation of images by camera does not really rotate the images, it only embed a code to the tell the computer softwares like PS or any viewing programe how is this image orientation like. so shouldn't take any effect of quality on the images.
some programme have lossless rotation function also by editing the "code", since it does not open the images, rotate it and save, so it called lossless.