Home License -- for personal use only. Not for government, academic, research, commercial, or other organizational use. 13-May-2025 14:54:50 image_edge_test(): MATLAB/Octave version 9.11.0.2358333 (R2021b) Update 7 Test image_edge(). IMAGE_EDGE MATLAB/Octave version 9.11.0.2358333 (R2021b) Update 7 Demonstrate the NEWS stencil for edge detection in images. Reading "coins.ascii.pgm". Figure 1: This is the original gray scale image. Figure 2: We have added a border of 1-pixel thickness. Now all the pixels in the original picture have a 3x3 pixel neighborhood. Figure 3: We computed the value of E for each pixel, and scaled it to [0,255]. Figure 4: We zeroed all the pixels with a value of E less than the threshold of 50 so the edges show up better. Figure 5: Black lines on white background are MUCH easier to read. Figure 6: This is actually an RGB "color" image. This way, we can show the detected edges in red. IMAGE_EDGE: Normal end of execution. image_edge_test(): Normal end of execution. 13-May-2025 14:55:26