Convert this shark image into a grayscale DEPTH MAP for stereogram (SIRDS) generation. Isolate ONLY the shark's head/face with open jaws — crop to the head, remove the body and background entirely. Render it as a smooth grayscale height map: the parts closest to the viewer (the tip of the snout, the open mouth and front teeth) are the BRIGHTEST white, receding surfaces (sides of the head, gills, back of the jaw) fade through mid-grays, and the background is pure solid black (0,0,0). Use soft, gradual gradient transitions between depth levels (no hard edges), gentle Gaussian-blurred contours, clean silhouette. No textures, no colors, no shadows, no details — only smooth luminance encoding depth. Centered composition, high resolution.
