US 12,148,132 B2
Image calibration method and image calibration apparatus
Yu-Chen Kuo, Hsinchu (TW); Yu-Ting Lin, Hsinchu (TW); and Kuo-Chang Chen, Hsinchu (TW)
Assigned to ALTEK SEMICONDUCTOR CORPORATION, Hsinchu (TW)
Filed by ALTEK SEMICONDUCTOR CORPORATION, Hsinchu (TW)
Filed on Jan. 27, 2022, as Appl. No. 17/585,596.
Prior Publication US 2023/0237626 A1, Jul. 27, 2023
Int. Cl. G06T 7/194 (2017.01); G06T 3/40 (2024.01); G06T 5/50 (2006.01); G06T 5/77 (2024.01); G06T 5/80 (2024.01); G06T 7/33 (2017.01); G06T 7/66 (2017.01)
CPC G06T 5/80 (2024.01) [G06T 3/40 (2013.01); G06T 5/50 (2013.01); G06T 5/77 (2024.01); G06T 7/194 (2017.01); G06T 7/33 (2017.01); G06T 7/66 (2017.01); G06T 2207/20081 (2013.01); G06T 2207/20221 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An image calibration method applied to an image calibration apparatus having a wide-angle image sensor and an operation processor, comprising:
the wide-angle image sensor capturing and transmitting a wide-angle image to the operation processor;
the operation processor applying primary lens distortion correction for the wide-angle image to generate a corrected image;
the operation processor segmenting a foreground image from the corrected image to generate a background image, wherein the foreground image contains feature pixels related to a pre-defined object and the background image has empty pixels corresponding to the foreground image;
the operation processor applying secondary distortion correction for the foreground image based on the pre-defined object to generate a calibrated foreground image;
the operation processor fusing the background image with the calibrated foreground image to generate a fused image;
the operation processor detecting at least one residual empty pixel not overlapped by the calibrated foreground image within the fused image; and
the operation processor utilizing a machine learning algorithm to fill the at least one residual empty pixel of the fused image by extending the background image to provide an output image.