Miniature Gold Frame Detector
Detect a gold frame around a miniature under the stated rule: class from the count of gilded sides (0 none, 1-3 partial border, 4 full frame), with the frame only 'confirmed' when the mean gold border width also meets a threshold (default 2 mm).
Description
Detect a gold frame around a miniature under the stated rule: class from the count of gilded sides (0 none, 1-3 partial border, 4 full frame), with the frame only 'confirmed' when the mean gold border width also meets a threshold (default 2 mm).