Fig. 21
From: High-resolution shape models of Phobos and Deimos from stereophotoclinometry
Results of the keypoint matching, keypoint distance, and limb/terminator methods applied to Deimos. a Histogram of the scale factor needed to match the model to the reference image based on the keypoint matching method for 125 images. Values < 1 indicate the model is larger than the images. The keypoint matching method indicates a 188-m accuracy and a + 31-m scale uncertainty for a scale factor of 0.995 (the model is slightly larger than the images). b Histogram of the median residual difference between the model and the reference image based on the keypoint distance method for 125 images. They keypoint distance method indicates a 131-m accuracy and a + 10-m scale uncertainty. c Histogram of the difference between the model (rendered image) and the reference image based on the limb/terminator method for 219 images. The limb/terminator comparison indicates a 65-m accuracy uncertainty and a + 9-m scale uncertainty (again the model is larger than the images)