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US 8,577,139 B2Granted
Method of orthoimage color correction using multiple aerial images
AssigneeNational Central University
InventorsLiang-Chien Chen, Wen-Chi Chang, Chien-Liang Liu, Chia-Hwa Lin
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Abstract
A method for true-orthoimage color correction is provided. Aerial images and digital elevation models (DEMs) are used for balancing colors in orthoimages or true-orthoimages. Seam lines between images are also smoothed. Thus, color distinction between images is rectified and orthoimage quality is greatly enhanced.
Claims7
A computer executable method of orthoimage color correction using multiple aerial images, comprising steps of:
- (a) processing a global color correction by using a plurality of aerial images coordinated with digital elevation models (DEMs),
- wherein a gray value statistic is obtained for each of said aerial images individually and then a plurality of orthoimages or true-orthoimages is processed through a global color correction according to said plurality of aerial images and said corresponding gray value statistics;
- (b) processing a local color correction to seam lines between said plurality of orthoimages or true-orthoimages;
- and
- (c) outputting a result from the computer.
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