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Correct Exposure Using Multiply Blending

Page 1 of 2
Written by Gregory Scot Collins
Thursday, 23 November 2006, 6:14 AM
This article has been tested to work with the following products and versions. No guarantee of compatibility, with or without modification, is offered for products or versions other than those listed.
While stitching together a 1x3 panorama of a waterfall in Yellowstone National Park, I found that I did not have the exposure locked for the bottom photo (refer to Picture 1) resulting in some obvious brightness inconsistencies.
Picture 2 shows the results of stitching the panorama in PTGui and cropping in Photoshop. It is obvious that the exposure difference in the third photo was an issue that is not going to be corrected by the automatic color correction feature in PTGui.
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List of Figures
Picture 1 - The exposure for the last of the three pictures does not match the first two.
Picture 2 - The stitched and cropped panorama appears faded at the bottom.
Screenshot 1 - Correcting exposure using multiply blending.
Picture 3 - Comparison between the original (left) and corrected (right) third photo.
Picture 4 - The stitched and cropped panorama using the corrected third photo.
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