好像不让改，看看这个小奖的规定：National geographic 2012

 Minor burning, dodging and/or color correction is acceptable. Hand tinting is acceptable, as is cropping. Fisheye lenses are acceptable. High dynamic range images (HDR) and stitched panoramas are acceptable only if the combined parts are all made around the same time. Any changes to the original Photograph not itemized here are unacceptable and will render the Photograph ineligible for a prize.

2012 年4月5号开始，别忘了上传到http://travel.nationalgeographic.com/travel/traveler-magazine/photo-contest/