Skew Detection and Ortho-rectification for System Corrected Landsat TM Images
Hiroyuki Saito, Yuuki Miura · 2019
We have been working on the development of geometrical correction method combining the Fourier phase only correlation method (POC) and an ortho-rectification method based on affine transform for system-corrected Landsat TM images. In this paper, in order to suppress image destruction by interpolation and improve registration accuracy, the bilinear interpolation method used for image interpolation was changed to the bicubic convolution interpolation method, and this method was applied to a system corrected Landsat TM image. As a result, it was found that the registration accuracy was improved to 9.0 m in x-direction and 37.3 m in y direction, respectively (in UTM coordinates). And it was found that the system-corrected Landsat TM image contains small skew distortion. After correcting the skew distortion, as a result of re-applying our improved geometric correction method, the registration accuracy became 3.4m in x-direction and 2.5 m in y-1 direction, which is dramatically improved.