Contrast Control Light Segmentation for Dynamic Range
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Solution Overview
Problem
Existing image recording technologies, such as film and electronic sensors, face challenges in managing the dynamic range of contrast due to limitations in their admissible ranges, leading to issues like over- and underexposure, especially when capturing scenes with significant brightness variations.
Innovation Solution
A method and apparatus that adjust the brightness of individual base colors in the control light independently, allowing for optimal control of the contrast range by using a plurality of partial light sources and a central control unit to store nominal values, and adjust the spectral distribution based on the image recording medium's sensitivity, ensuring the control light's flexibility in handling scenes beyond the admissible dynamic range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single light source with fixed spectral distribution is used for contrast control, then the device complexity is reduced, but the adaptability to different image recording media and scenes is limited
Solution Approach 1:
The light source is segmented into multiple independent partial light sources, each emitting a specific base color (red, green, blue). This allows independent control of each color component, enabling adaptation to different image recording media spectral sensitivities while maintaining manageable device complexity through modular architecture
Solution Approach 2:
The system transitions from a static single light source to a dynamic multi-color light source where the brightness of individual base colors can be independently adjusted. This dynamic control enables optimization of contrast range for different scenes and recording media without requiring complete system redesign
2Manufacturing precision
If the brightness of all colors in the control light is adjusted uniformly, then the device operation is simplified, but the precision of contrast range control is reduced
Solution Approach 1:
The control light is segmented into independently controllable base colors (red, green, blue), allowing precise adjustment of each color's brightness contribution. This segmentation enables fine-tuned contrast range control tailored to specific scene requirements and recording media characteristics
Solution Approach 2:
The system changes the parameters of individual base colors (brightness levels) independently rather than adjusting all colors uniformly. This parameter optimization allows precise control of the spectral distribution to match the dynamic range capabilities of different image recording media
3Manufacturing precision
If light sources are arranged to provide uniform illumination, then the image quality is improved, but the contrast range control capability is reduced
Solution Approach 1:
Different regions of the glass pane are assigned different light source configurations based on local requirements. The peripheral regions use light sources optimized for uniform illumination, while central regions can be configured for enhanced contrast control. This local differentiation allows simultaneous optimization of image quality and contrast range control
Solution Approach 2:
The system dynamically adjusts the brightness of individual base colors at different locations or regions, allowing the same physical structure to provide both uniform illumination and enhanced contrast control capability as needed for different recording scenarios
4Adaptability or versatility
If electronic image sensors are used with limited dynamic range, then the device complexity is reduced compared to film systems, but the ability to capture scenes with great brightness differences is limited
Solution Approach 1:
The system changes the spectral parameters of the control light by independently adjusting the brightness of red, green, and blue base colors. This creates a customized spectral distribution that can be optimized to match the dynamic range and spectral sensitivity characteristics of electronic image sensors, extending their effective dynamic range coverage
Solution Approach 2:
The system incorporates feedback mechanisms to monitor the recorded image quality and adjust the brightness of individual base colors accordingly. This feedback loop enables continuous optimization of contrast range control to maximize the utilization of the image sensor's dynamic range
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 effectively optimizes the contrast and dynamic range of the recorded image by selectively varying the brightness of base colors, ensuring that both bright and dark regions are captured within the image recording medium's capabilities, thereby enhancing the overall image quality.
Implementation Method 1
The light source at least includes a number of partial light sources corresponding to the number of base colors, and a central control unit of a contrast control unit controls the brightness of the partial light sources
Implementation Method 2
a glass pane with a plurality of light sources distributed around the periphery of the glass pane, which couple light into the plane of the glass pane, which light is reflected inside the glass pane
Implementation Method 3
the planar surfaces of the glass pane are provided with an anti-reflection coating, in order to achieve a maximum transparency for the image recording optical path
Data Source
AI summary
A method for controlling the contrast range of the image recording light falling on an image recording medium by means of control light coupled into the optical path of the image recording light, which is composed of several base colors whose brightness is adjusted independent of each other, is provided. The brightness at least of those base colors of the control light is varied, whose dynamics in the recorded image go beyond the admissible dynamic range.