void sod_image_draw_box_grayscale(sod_img input, int x1, int y1, int x2, int y2, float g);
Draw a single box (i.e. rectangle) on an input grayscale image. As of this release, we recommend using sod_image_draw_bbox() instead. This function is very useful when working with the object detection interfaces for example to mark a detected object (i.e. car, plane, person, etc.) coordinates. When done, you can save the output on disk using sod_img_save_as_png() for instance.
The input image to be processed. 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().
The x-coordinate, in logical units of the rectangle starting position.
The y-coordinate, in logical units of the rectangle starting position.
The x-coordinate, in logical units of the rectangle ending position. So x2 - x1 should give you the width of this rectangle.
The y-coordinate, in logical units of the rectangle ending position. So y2 - y1 should give you the height of this rectangle.
Gray color value in a typical grayscale colorspace.
Checkout the introduction course, the C/C++ samples on the download page or refer to the SOD Github Repository.
sod_canny_edge_image • sod_image_draw_bbox • sod_image_find_blobs • sod_hough_lines_detect • sod_grayscale_image • sod_crop_image.