Fig. 6From: Detection of surface defects and subsurface defects of polished optics with multisensor image fusionExtraction results of three types of defects. a b c Superposition images of three sites. d Surface detects image (the extended SSD in Fig. 6a is removed). e Extended SSDs image (the extended SSD in Fig. 6b is reserved). f Covered SSDs image (the extended SSD in Fig. 6c is removed)Back to article page