non ho capito a che gli serve l'effetto di sfocatura applicato lungo il bordo superiore della roccia in primo piano.
Onboard Focus Stacking
MAHLI’s onboard focus stacking (z-stacking) capability is a form of image compression. MAHLI can acquire up to 8 images on either side of best focus and then merge them to form a single best focus image and a range map. This reduces the number of images returned to Earth from 8 to 2, and the second one, the range map, is a smaller data volume, grayscale image.
The data for z-stacking are acquired in raw form. The data are RGB interpolated, and then the focus stacking algorithm uses the interpolated data as input. The software registers these focal plane images using multiresolution Kanade-Lucas-Tomasi (KLT) feature tracking with Harris corner detection to identify feature points and track them between image pairs in the stack. The focus merge and range map are generated via a windowed Sum-Modified-Laplacian focus measure to determine the areas of best focus and uses a Gaussian interpolation for computing the depth map. The software also has an option to combine the images using multiresolution spline based image blending.
Onboard focus stacking will not always be used. It will typically be used for only the highest resolution images and MAHLI users will routinely determine under which circumstances it is to be employed, carefully considering trades between downlink availability, pixel scale, knowledge of camera head vibrational environment (during image acquisition) at the end of the robotic arm under Martian environmental conditions, and the science objectives at a given imaging target.
Bisogna almeno riconoscergli la pazienza di aver ritagliato con estrema precisione la sagoma della roccia
Messaggio orinale: https://old.luogocomune.net/site/newbb/viewtopic.php?forum=13&topic_id=7941&post_id=282931