SOD C/C++ API Reference - Image Processing
Syntax
sod_img sod_sobel_image(sod_img input);Description
Apply sobel operator on an input image. The sobel operator is very similar to Prewitt operator. It is also a derivate mask and is used for edge detection.
This works only on grayscale images. If you want to convert the colorspace of your input picture to the gray color model, call sod_grayscale_image(), sod_grayscale_image_3c() before or simply load your image from disk using the macro sod_img_load_grayscale(). A typical input image after processing should look like the following:
Input Picture
After Processing via sod_sobel_image()
Parameters
sod_img input
The input image to be processed which must be in the grayscale colorspace. The image can be loaded from disk using sod_img_load_from_file(), from memory (i.e. network socket) via sod_img_load_from_mem() or dynamically created via sod_make_image().
Return Value
Processed image is returned in an instance of the sod_img object. if something goes wrong during processing, then an empty image is returned via sod_make_empty_image(). Once done, you must release the memory allocated to this object via sod_free_image() to avoid memory leaks.
Example
Checkout the introduction course, the C/C++ samples on the download page or refer to the SOD Github Repository.
See also
sod_canny_edge_image • sod_image_draw_bbox • sod_image_find_blobs • sod_hough_lines_detect • sod_crop_image • sod_hilditch_thin.
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