Handheld Blur Evaluation Using Disturbance-Corrected Image Loci

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Solution Overview

Problem

Existing technologies are unable to accurately evaluate handheld blur in imaging units, particularly when the image stabilizing function is turned off.

Innovation Solution

A handheld blur evaluating apparatus that includes an excitation unit to excite the imaging unit, a detector to measure changes in image data, and a corrector to account for disturbances, allowing for precise evaluation of handheld blur by analyzing the locus of the image center of gravity and separating blur components.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the image stabilizing function is turned off for handheld blur evaluation, then the measurement can reflect actual handheld conditions, but the measurement accuracy deteriorates due to disturbance in measurement data

Engineering Contradiction:

Improvehandheld blur evaluation accuracyVSAvoidmeasurement data stability

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent extracts and separates the disturbance component from the measurement data by comparing images taken with different exposure times. The disturbance is identified as the common component between short and long exposure images, and is then removed to obtain the pure handheld blur evaluation metric.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent uses an excessive exposure time setting that intentionally causes saturation or clipping in the image data. This excessive action creates a distinctive pattern that helps identify and separate the disturbance component from the actual handheld blur, enabling more accurate measurement.

Inventive Principle:

Principle #16Partial or excessive action

2Device complexity

If traditional measurement methods are used without disturbance correction, then the measurement process is simpler, but the evaluation accuracy of handheld blur deteriorates

Engineering Contradiction:

Improvemeasurement process simplicityVSAvoidhandheld blur evaluation accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent implements a feedback mechanism where the disturbance detected from the image data is fed back into the calculation process. The detected disturbance is used to correct the handheld blur evaluation, creating an iterative refinement that improves measurement accuracy while maintaining a systematic approach.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If multiple exposure times are used for disturbance detection, then the accuracy of separating blur components improves, but the measurement time increases

Engineering Contradiction:

Improveblur component separation accuracyVSAvoidmeasurement time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent uses periodic action by capturing images at multiple discrete exposure time intervals. This periodic sampling at different exposure times allows the system to detect and characterize the disturbance pattern, which can then be used to separate blur components accurately.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS12568200B2Handheld blur evaluating apparatus, handheld blur evaluating method, manufacturing method of imaging unit, and storage medium

Publication Date: 2026.03.03 CANON KK

AI summary

A handheld blur evaluating apparatus is configured to evaluate a handheld blur of an imaging unit. The handheld blur evaluating apparatus includes an excitation unit configured to excite the imaging unit configured to image an object, a detector configured to detect disturbance in a change amount in measurement data of an image imaged by changing an imaging condition relating to exposure time or luminance, and a driving state indicating that the excitation unit is in a stationary state or in an excitation state, and a corrector configured to correct the disturbance.