Fig. 1. Flowchart of the proposed method
Fig. 2. An example of number of extracted data samples (band 1): (a) MPs, (b) PIFs
Fig. 3. Mask filter generation for secondary PIFs extraction (M×M size): (a) Mask filter generation, (b) Evaluation of similarity between PIFs and its neighboring pixels within mask filter, (C) Secondary PIFs extraction
Fig. 4. Experimental images of study area: (a) Reference image, (b) Subject image
Fig. 5. Extracted MPs: (a) Reference image, (b) Subject image
Fig. 8. Secondary PIFs extracted by mask filter (a) Reference image, (b) Geo-rectified subject image
Fig. 9. Comparison of band-by-band linear regression analysis according to relative radiometric correction: (a) MPs (SURF): 3,042, (b) PIFs: 290, (C) Proposed method (7×7 size): 972
Fig. 10. Experimental results of relative radiometric correction: (a) Reference image, (b) Geo-rectified subject image, (c) MPs, (d) PIFs, (e) Proposed method (7×7 size)
Fig. 11. Accuracy analysis of radiometric correction (converting NRMSE as a percentage): (a) Band 1, (b) Band 2, (c) Band 3, (d) Band 4, (e) Average
Fig. 6. Mosaic images of automatic geometric correction result: (a) Raw image, (b) Geo-rectified image
Fig. 7. Extracted PIFs: (a) Reference image, (b) Georectified subject image
Table 1. Specification of the study data
Table 2. NRMSE values of automatic geometric correction results
Table 3. NRMSE values of relative radiometric correction results
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