Image Verification Apparatus Defect Detection

The patent applies preliminary action by performing defect detection on the candidate correct answer image before registering it as the final correct answer image. The verification apparatus reads the printed sheet, detects defects in the read image, and only registers images without defects as correct answer images. This preliminary defect detection prevents streaks caused by paper dust from being included in the correct answer image, thereby resolving the contradiction between improving verification accuracy and avoiding harmful streaks.

The patent applies self-service by enabling the verification apparatus to automatically detect defects and select appropriate correct answer images without requiring manual intervention. The system autonomously reads multiple printed sheets, performs defect detection on each, and automatically selects images without defects as correct answer images. This automated process maintains high verification reliability while significantly reducing the time and effort required for correct answer image selection compared to manual methods.

The patent applies feedback by implementing a defect detection mechanism that provides feedback on the quality of candidate correct answer images before registration. The verification apparatus reads the printed sheet, detects defects in the read image, and uses this feedback to determine whether to register the image as a correct answer image. Images with detected defects are excluded from registration, ensuring that only high-quality images are stored. This feedback loop maintains verification reliability while keeping the registration process simple and automated.