Manual Focusing Window Capture for High-Resolution Edge Verification
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Solution Overview
Problem
Manual focusing in photographing devices is hindered by the display of low-resolution images due to signal dropout during image conversion, making it difficult for users to accurately focus on subjects.
Innovation Solution
A manual focusing method and system that captures a window of a predetermined sized partial image from the high-definition image and displays it on the user interface, allowing for high-resolution image viewing during focusing operations, which can be arbitrarily set by the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display unit displays a standard definition (SD) image converted from high definition image, then the display unit can provide sufficient resolution for user convenience, but the image becomes distorted due to signal dropout during conversion, making it difficult for users to verify sharp edges and focus accurately
Solution Approach 1:
The patent divides the high definition image into multiple blocks and selectively processes these blocks to generate a super-resolved image. By segmenting the image and applying super-resolution processing to specific blocks, the system recovers high-frequency information that was lost during SD conversion, enabling accurate edge verification and precise manual focusing without requiring full HD image transmission.
2Ease of operation
If the photographing device uses automatic focusing mode, then the focusing operation is executed without user involvement, but the desired subject might not be accurately focused in the way the photographer wants
Solution Approach 1:
The patent implements a feedback mechanism where the super-resolved image is displayed on the display unit to provide real-time visual feedback to the user during manual focusing. This allows the user to see enhanced edge details and sharpness information, enabling precise focusing control while maintaining the simplicity of manual operation. The feedback loop connects user focusing adjustments with visual confirmation of focusing quality.
3Measurement precision
If the display unit displays a downgraded SD image, then the device complexity is reduced and power consumption is lowered, but the user cannot verify sharp edges in the image being photographed
Solution Approach 1:
The patent performs super-resolution processing on selected blocks of the HD image before displaying them on the SD display unit. This preliminary enhancement of specific image blocks recovers high-frequency information in advance, allowing edge sharpness verification on the low-resolution display without requiring complex real-time processing during focusing operation.
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
Enables more accurate manual focusing by displaying a high-resolution image, improving the user's ability to verify sharp edges and focus correctly.
Implementation Method 1
The CCD 20 is a photoelectric conversion device that produces an output voltage proportional to the quantity of incident light
Data Source
AI summary
Disclosed are a manual focusing method and system in a photographing device, wherein the manual focusing method includes checking whether manual focusing mode for manually focusing is selected. If the manual focusing mode is selected, a window is captured which is a predetermined sized partial image taken from a photographed image. The capture image is output and displayed. Since a window captured out of the photographed image is displayed, the user is able to manually focus more accurately by reviewing the higher resolution captured image.