Electronic Finder Imaging Range Recognition
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Solution Overview
Problem
In cameras with electronic finders, the imaging frame is often smaller than the finder image, making it difficult for users to recognize the imaging range, especially when the frame is offset from the center, causing a sense of unease and difficulty in capturing subjects outside the frame.
Innovation Solution
A camera system that generates a finder-ranging image with an imaging frame expressing the outer border of the imaging range, ensuring the imaging range is substantially at the center and one size larger than the imaging frame, displayed within a larger finder range, allowing users to easily recognize the imaging area without unease, and includes separate image sensors for faster imaging and improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the imaging frame is made smaller to fit within the finder image, then the finder image can display more of the scene, but the imaging range becomes difficult to recognize
Solution Approach 1:
The imaging frame is displayed in a distinct color (typically a bright color like yellow or red) that contrasts with the finder image background, making the imaging range easily distinguishable even when the frame is small relative to the overall finder image display area
Solution Approach 2:
The imaging frame is positioned asymmetrically within the finder image to accurately represent the actual imaging range, which may be offset from the center due to parallax or optical system characteristics, while still maintaining clear visibility through color differentiation
2Measurement precision
If the imaging frame is displayed in deviation from the center of the finder image to accommodate parallax, then accurate imaging range representation is achieved, but users feel a sense of unease
Solution Approach 1:
The imaging frame uses a distinctive color that draws attention and clearly indicates the actual imaging area, helping users mentally adjust to the offset position and reducing the sense of unease caused by the non-centered display
Solution Approach 2:
The imaging frame acts as an intermediary visual element that bridges the discrepancy between the optical system's actual imaging range and the user's expected centered view, providing clear visual feedback about what will be captured
3Productivity
If separate image sensors are used for the electronic finder and taken-image, then imaging speed is accelerated, but device complexity increases
Solution Approach 1:
The camera system is segmented into separate imaging functions: one image sensor dedicated to the electronic finder display and another for the final taken-image, allowing parallel processing and eliminating the need to choose between display refresh rate and capture speed
Solution Approach 2:
Each image sensor is optimized for its specific function - the finder sensor provides continuous real-time preview while the main sensor captures high-quality images, with both sensors working independently to serve multiple purposes without interfering with each other
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
Users can easily and confidently recognize the imaging range within the finder image, with the imaging frame always centered, enabling quick capture of subjects outside the frame, while separate image sensors enhance imaging speed and quality, reducing shutter lag and improving overall camera performance.
Implementation Method 1
a first signal generation module that generates a first image signal by photoelectrically converting the image of the subject
Implementation Method 2
a second signal generation module that generates a second image signal by photoelectrically converting the image of the subject
Data Source
AI summary
A main electronic imaging device takes in as a taken-image an image of a subject obtained through an imaging lens. An electronic finder device photoelectrically first generates the image of the subject and generates an image signal. Based on the generated image signal, the electronic finder device places the imaging range PA substantially at the center, generates an image of finder range FA that is one size larger than the imaging range PA, and provides the image of finder range FA that is generated with an imaging frame 47a that expresses the outer border of the imaging range so as to obtain the image as a finder image, and controls so that the finder image is displayed on a display 47. As a result, the imaging range PA is smaller than the finder range FA but is smaller by only one size. The ratio occupied by the imaging range PA within the finder range FA is accordingly sufficiently large, and the imaging range PA can be recognized easily and without fail.