Print Inspection Control for Selective Blank Page Checking

The patent applies local quality by differentiating the inspection treatment based on the specific characteristics of each blank page. Instead of uniformly inspecting all blank pages, the system identifies blank pages that are actually part of the product (e.g., blank pages in stamp sets where the glue surface needs inspection) versus blank pages that are not part of the product (e.g., insert sheets). This selective inspection approach ensures reliable inspection coverage for relevant blank pages while avoiding unnecessary inspections that reduce efficiency.

The patent utilizes parameter changes by modifying the inspection parameters based on the page type and product characteristics. The system changes the inspection setting parameter dynamically - when a blank page is identified as part of the product, inspection is enabled with appropriate reference images; when a blank page is identified as not part of the product, inspection is disabled. This parameter adjustment resolves the contradiction by adapting inspection behavior to specific contextual conditions.

The patent resolves this contradiction through local quality by implementing differentiated inspection strategies based on the functional characteristics of blank pages. The system identifies whether a blank page serves a functional purpose within the product (such as the glue surface of stamps that customers visually inspect) versus being a non-functional element. This localized differentiation ensures that measurement precision is maintained for blank pages that are actually part of the product while improving overall inspection efficiency by excluding irrelevant blank pages.

The patent employs feedback mechanisms to determine whether blank pages should be inspected. The system uses feedback from product type identification, page position detection, and visual characteristics analysis to dynamically adjust inspection parameters. When feedback indicates that a blank page is part of the product (e.g., based on product category or visual cues), inspection is activated to maintain measurement precision. This feedback loop ensures that precision is not compromised while efficiency is improved through selective inspection.

The patent applies local quality to reduce device complexity by generating reference images selectively rather than universally. The system determines whether a blank page requires a reference image based on its functional relevance to the product. For blank pages that are part of the product (where defects matter), reference images are generated and stored. For blank pages that are not part of the product, reference image generation is skipped. This localized approach maintains inspection completeness for relevant pages while reducing the complexity of handling all possible page types uniformly.

The patent utilizes preliminary action by pre-identifying and classifying blank pages before the inspection process begins. The system performs preliminary analysis of page characteristics, product type, and position to determine which blank pages require reference images in advance. This preliminary classification allows the system to prepare appropriate reference images only for relevant blank pages, avoiding the complexity of generating and managing reference images for all pages uniformly while ensuring completeness for those that matter.