Mobile Terminal Shine Detection and Retake Mechanism

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Solution Overview

Problem

Conventional digital cameras do not accurately determine image quality by detecting shine on image data, particularly in areas where halation occurs, leading to inaccurate assessments of photographed subjects.

Innovation Solution

A mobile terminal with a processor that acquires image data, detects shine on document images, compares it to a baseline, and automatically retakes the photograph if the shine is not within acceptable limits, ensuring image quality meets specific criteria.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional digital cameras determine image quality without detecting shine on image data, then the determination process is simple, but the accuracy of image quality assessment deteriorates

Engineering Contradiction:

Improveimage quality assessment accuracyVSAvoidimage processing complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent performs preliminary detection of shine and halation areas on the photographed image before final image quality determination. By identifying these problematic areas in advance, the system can accurately assess whether the image meets quality standards, resolving the contradiction between simple processing and accurate assessment.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces conventional simple quality metrics with advanced image processing algorithms that detect shine and halation. This substitution of mechanical/simple determination methods with computational analysis enables accurate image quality assessment while maintaining automated processing efficiency.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If the system automatically retakes photographs when shine exceeds baseline, then image quality reliability improves, but the time required for photographing increases

Engineering Contradiction:

Improveimage quality reliabilityVSAvoidphotographing time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent implements a feedback mechanism where the system automatically evaluates photographed images for shine and halation, compares them against baseline quality standards, and triggers retakes when quality thresholds are not met. This closed-loop feedback ensures reliable image quality while minimizing unnecessary retakes through intelligent decision-making.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent dynamically adjusts quality determination based on detected parameters such as shine intensity and halation areas. By changing the evaluation parameters adaptively, the system ensures reliable quality assessment while optimizing the number of retakes needed, thereby reducing overall photographing time.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10832070B2Mobile terminal, image processing method, and computer-readable recording medium

Publication Date: 2020.11.10 PFU LTD

AI summary

A mobile terminal includes a memory, and a processor coupled to the memory, wherein the processor executes a process comprising acquiring a frame with taking a photograph, acquiring document image data of a document from the frame, detecting shine on the document image data, determining whether the shine is equal to or smaller than a shine baseline, and acquiring a frame with retaking a photograph when the shine is neither equal to nor smaller than the shine baseline.