Dynamic Peaking Sensitivity for Accurate Focus Adjustment
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Solution Overview
Problem
The peaking function in digital camera focusing is ineffective due to high frequency energy being affected by subject characteristics, leading to marker saturation or invisibility, which hinders accurate focus adjustment.
Innovation Solution
An image processing apparatus that dynamically adjusts sensitivity based on predetermined conditions to control highlighting display, ensuring appropriate peaking assistance by modulating filter factors, thresholds, and gain in response to in-focus degree and shooting conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If peaking markers are displayed based on high frequency energy threshold, then in-focus areas can be highlighted, but markers become saturated or invisible depending on subject characteristics
Solution Approach 1:
The patent applies dynamics by making the peaking sensitivity adjustable and adaptable. The system dynamically adjusts the sensitivity level based on subject characteristics and focusing state, transitioning from a fixed threshold approach to a flexible, responsive system that maintains reliability across different shooting conditions
Solution Approach 2:
The patent implements parameter changes by modifying the sensitivity parameter of the peaking function. By changing the sensitivity level according to subject contrast, texture, and focusing degree, the system prevents marker saturation in high-contrast subjects and ensures visibility in low-contrast subjects, thereby resolving the reliability issue
2Ease of manufacture
If fixed sensitivity is used for peaking display, then implementation is simple, but peaking markers are not displayed properly for all subject types
Solution Approach 1:
The system transitions from a static, fixed sensitivity configuration to a dynamic sensitivity adjustment mechanism that adapts to different subject types, maintaining implementation feasibility while significantly improving adaptability across diverse shooting scenarios
Solution Approach 2:
By introducing adjustable sensitivity parameters that can be modified based on subject characteristics, the patent maintains the simplicity of the basic peaking implementation while adding adaptability through parameter modification rather than complex structural changes
3Illumination intensity
If highlighting sensitivity is increased to improve visibility, then low contrast subjects can be detected, but high contrast subjects become saturated
Solution Approach 1:
The patent resolves this contradiction by making the sensitivity parameter adjustable based on subject characteristics. For low-contrast subjects, sensitivity is increased to improve visibility, while for high-contrast subjects, sensitivity is reduced to prevent saturation, thereby eliminating the harmful effect of marker saturation across different subject types
Data Source
AI summary
An image processing apparatus including a display control unit that displays highlighting corresponding to an in-focus degree of a subject included in an image on the basis of predetermined sensitivity and that performs control so that the sensitivity is determined depending on a predetermined condition.