Possible Duplicate:
Does it give higher quality to shoot in low-res mode in-camera, or to downsize high-res photos later?
Compare these two scenarios (using the same camera):
1) You take a picture with resolution 3200x2400, transfer it to a computer and resize it to 1600x1200.
2) You take a picture with resolution 1600x1200 and then transfer it to a computer.
Will the picture in 1) be better than the picture in 2)?