Imaging Apparatus Exposure Control for Continuous Shooting Consistency
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Solution Overview
Problem
Existing imaging apparatuses during continuous shooting display images of different resolutions, leading to variations in image quality due to exposure differences, causing discomfort for users due to unnatural display of images with different brightness, resolution, and contrast.
Innovation Solution
The apparatus controls the aperture value to maintain consistent exposure conditions between live view and still image photography, using pupil-divided focus detection pixels and adjusting exposure time and ISO sensitivity to ensure consistent image quality, thereby reducing the difference in image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If images of different resolutions are sequentially displayed during continuous shooting, then the display refresh rate is improved, but image quality consistency deteriorates due to exposure differences
Solution Approach 1:
The patent applies preliminary action by determining in advance whether to display still images or live view images based on shooting frame rate conditions before the display occurs. When the frame rate is 10 fps or higher, still images are displayed; when below 10 fps, live view images are displayed. This pre-determination prevents image quality inconsistency by ensuring appropriate image types are selected before display, resolving the contradiction between maintaining high display refresh rates and ensuring image quality consistency.
Solution Approach 2:
The patent changes the parameter of display content type (still image vs. live view image) based on the shooting frame rate parameter. By setting a threshold at 10 fps and switching between different image display modes, the system adapts to different shooting conditions, ensuring that high frame rate shooting displays still images for consistency while lower frame rates display live view images, thus resolving the image quality consistency issue while maintaining optimal display refresh rates.
2Manufacturing precision
If exposure conditions are adjusted for still image photography, then still image quality is improved, but live view display quality deteriorates due to exposure differences
Solution Approach 1:
The patent applies preliminary action by determining in advance whether to display still images or live view images based on shooting frame rate conditions before the display occurs. When the frame rate is 10 fps or higher, still images are displayed; when below 10 fps, live view images are displayed. This pre-determination prevents image quality inconsistency by ensuring appropriate image types are selected before display, resolving the contradiction between maintaining high display refresh rates and ensuring image quality consistency.
Solution Approach 2:
The patent changes the parameter of display content type (still image vs. live view image) based on the shooting frame rate parameter. By setting a threshold at 10 fps and switching between different image display modes, the system adapts to different shooting conditions, ensuring that high frame rate shooting displays still images for consistency while lower frame rates display live view images, thus resolving the image quality consistency issue while maintaining optimal display refresh rates.
3Measurement precision
If focus detection pixels are used for phase difference AF, then focus detection accuracy is improved, but image resolution is reduced due to pupil division
Solution Approach 1:
The patent applies preliminary action by determining in advance whether to display still images or live view images based on shooting frame rate conditions before the display occurs. When the frame rate is 10 fps or higher, still images are displayed; when below 10 fps, live view images are displayed. This pre-determination prevents image quality inconsistency by ensuring appropriate image types are selected before display, resolving the contradiction between maintaining high display refresh rates and ensuring image quality consistency.
Solution Approach 2:
The patent changes the parameter of display content type (still image vs. live view image) based on the shooting frame rate parameter. By setting a threshold at 10 fps and switching between different image display modes, the system adapts to different shooting conditions, ensuring that high frame rate shooting displays still images for consistency while lower frame rates display live view images, thus resolving the image quality consistency issue while maintaining optimal display refresh rates.
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 maintains display quality and followability during framing while minimizing the discomfort caused by variations in image quality, ensuring a consistent and natural viewing experience.
Implementation Method 1
an imaging element 306 that performs photoelectric conversion on an optical image and outputs an image signal
Data Source
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AI summary
According to an aspect of the invention, an imaging apparatus includes a first control unit (309) configured to control exposure parameters of an imaging element (306), and a second control unit (309) configured to perform processing of switching between and outputting a first image corresponding to pixel portions of a number of first pixels and a second image corresponding to pixel portions of a number of second pixels smaller than the number of first pixels among pixel portions of the imaging element. The second control unit performs focusing determination on the basis of at least one of the first image and the second image.