Camera Luminance Conversion Modes for Viewfinder Immersion
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Solution Overview
Problem
Users of digital cameras face difficulty in obtaining an immersive feeling when using electronic viewfinders due to color and brightness expressions differing from actual scenery, unlike the experience with optical viewfinders.
Innovation Solution
The system generates a display image by performing luminance conversion on captured images based on set modes, with one mode maintaining output luminance independent of exposure settings and another allowing luminance to change with exposure settings, to simulate the actual scene's luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If luminance conversion is performed to simulate actual scene luminance for immersive viewing, then the immersive feeling is improved, but the ability to preview exposure effects is lost
Solution Approach 1:
The system dynamically switches between two luminance conversion modes based on user selection: a first mode that converts luminance to simulate actual scene appearance for immersive viewing, and a second mode that preserves exposure settings to preview final image characteristics. This dynamic adaptability resolves the contradiction by allowing the system to provide either immersive viewing or exposure simulation depending on operational context.
Solution Approach 2:
The invention changes the luminance conversion parameters based on the selected mode. In the first mode, luminance conversion uses a characteristic that maps captured luminance to scene luminance regardless of exposure settings. In the second mode, luminance conversion preserves the relationship between exposure settings and output luminance. This parameter change enables the system to switch between immersive viewing and exposure preview functions.
2Manufacturing precision
If images are processed to be vivid with high contrast for recording, then the recorded image quality is improved, but the accuracy of scene representation is reduced
Solution Approach 1:
The system segments the image processing pipeline into two distinct processing paths: one path applies vividness enhancement and high contrast processing optimized for recorded image quality, while the other path maintains accurate scene luminance representation. The user can select which path to use based on whether they prioritize recording quality or scene accuracy, resolving the contradiction between these competing goals.
3Measurement precision
If exposure settings are applied to live view display, then the exposure preview accuracy is improved, but the consistency of scene luminance representation is reduced
Solution Approach 1:
The system provides multi-functionality by enabling the live view display to serve two purposes: accurate exposure preview and consistent scene luminance representation. Through a mode selection mechanism, users can switch between a first mode that applies exposure settings for accurate preview and a second mode that maintains consistent scene luminance. This universal design allows the same display system to fulfill both functions depending on user needs.
Data Source
AI summary
An apparatus obtains a captured image, obtains exposure setting relating to the captured image, obtains for luminance of a scene, sets a mode for generating the display image; and generates the display image by performing luminance conversion of the captured image depending on the set mode. The apparatus performs, in a case where a first mode is set, the luminance conversion of the captured image using a first conversion characteristic indicating that output luminance after conversion is determined for the luminance of the scene, and does not change depending on the exposure setting. And the apparatus performs, in a case where a second mode is set, the luminance conversion of the captured image using a second conversion characteristic indicating that the output luminance changes depending on the exposure setting.