Imaging Apparatus Dynamic Detection for Enlarged Video Signals
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Solution Overview
Problem
Imaging apparatuses face challenges in performing automatic processing capabilities effectively when enlargement processing is applied, as evaluation values for these capabilities are not accurately detected for signals outside the picture frame range, leading to inappropriate video signal output.
Innovation Solution
The imaging apparatus includes detection portions for different automatic processing types, using the picture frame range before and after enlargement processing, as well as after gamma processing, to obtain and control evaluation values for flare, white balance, dynamic contrast, and other processing capabilities, ensuring appropriate detection and execution of these capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If enlargement processing is performed to extract a partial range from the picture frame range, then the output video signal focuses on a specific region of interest, but the automatic processing capabilities (such as white balance and flare correction) are not performed appropriately because evaluation values are detected using the entire picture frame range instead of the enlarged region
Solution Approach 1:
The patent dynamically switches between two detection modes based on whether enlargement processing is performed. When enlargement is active, the system uses the enlarged picture frame range for detection; when enlargement is inactive, it uses the entire picture frame range. This dynamic adaptation resolves the contradiction by making the detection system flexible enough to handle both full-frame and enlarged-output scenarios appropriately
Solution Approach 2:
The patent applies different detection strategies to different operational states. For automatic processing capabilities affected by enlargement (such as white balance and flare correction), it uses evaluation values detected from the enlarged picture frame range specifically. This local differentiation ensures that detection accuracy is maintained for the relevant region while preserving overall system functionality
2Reliability
If evaluation values are detected using the entire picture frame range obtained by the imaging device, then comprehensive information is available for automatic processing, but signals of pixels outside the output video signal range are included, causing inaccurate detection of the actual enlarged video signal state
Solution Approach 1:
The patent segments the detection process into two distinct pathways: one for the entire picture frame range and another for the enlarged picture frame range. By separating these detection domains, the system ensures that evaluation values are derived from the appropriate pixel set for each operational mode, preventing contamination from irrelevant pixels while maintaining comprehensive coverage when needed
Solution Approach 2:
The patent introduces an intermediary mechanism that determines which detection pathway to use based on the enlargement processing state. This intermediary layer (the control logic that selects between full-frame and enlarged-range detection) ensures that the correct subset of pixel information is used for evaluating automatic processing capabilities, thereby maintaining reliability without losing relevant information
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for effective execution of automatic processing capabilities, resulting in high-quality video signals even during enlargement processing, ensuring accurate luminance and color correction across the entire image frame.
Implementation Method 1
an imaging portion that obtains an imaging video signal by photoelectrically converting incident light
Data Source
AI summary
An imaging apparatus includes: an imaging portion that obtains an imaging video signal; an enlargement processing portion that extracts a partial range from a picture frame range of the imaging video signal and applies video enlargement processing; a first detection portion that obtains a detection value for an automatic processing capability of a first type using the picture frame range before enlargement as a subject; a second detection portion that obtains a detection value for an automatic processing capability of a second type using a picture frame range of the imaging video signal after enlargement by the enlargement processing portion as the subject; a control portion that controls operations of the automatic processing capabilities of the first and second types according to the detection values; and one or plural processing portions that execute the automatic processing capabilities of the first and second types under control of the control portion.