Fig. 1. Diagram of light passing through optical heteromorphic window

Fig. 2. Three-dimensional visualization of optical heteromorphic window

Fig. 3. Shadow image in inward-turning inlet test

Fig. 4. Diagram of heteromorphic distortion calibration system

Fig. 5. Luminance distributions before and after light passing through optical heteromorphic window. (a) Incident light intensity of optical heteromorphic window; (b) output light intensity of optical heteromorphic window; (c) 3D distribution of grayscale with optical heteromorphic window

Fig. 6. Images of checkerboard calibration board with and without optical heteromorphic window. (a) Without optical heteromorphic window; (b) background noise; (c) with optical heteromorphic window; (d) image of calibration board after removing background

Fig. 7. Results of correction of distorted image. (a) Corner detection of original image; (b) corner detection of distorted image; (c) comparison of corrected image with original image; (d) comparison of correction image with distortion image