Illumination Array Compensation for Surface Shape Variations
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Solution Overview
Problem
In low ambient light conditions, photography often requires external illumination, but existing methods struggle to evenly compensate for different surface shapes of objects, leading to over or undercompensation of light, affecting the photography effect.
Innovation Solution
A method and apparatus that obtain surface reflection characteristics, relative direction information of the object to the photography position and illumination array, and adjust illumination parameters to achieve optimal illumination compensation, ensuring even lighting across the photographed scene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If uniform illumination is applied to all objects in the scene, then the illumination system is simple to control, but objects with different surface shapes experience over or undercompensation leading to uneven lighting
Solution Approach 1:
The patent applies local quality by adjusting illumination parameters based on the specific surface reflection characteristics of different objects. The system determines surface shape characteristics for each object and selectively modifies illumination parameters (such as intensity, direction, or timing) tailored to each object's reflective properties, ensuring that each object receives appropriately compensated lighting rather than uniform illumination.
Solution Approach 2:
The patent implements dynamics by making the illumination system adaptive and adjustable in real-time. The controller dynamically modifies illumination parameters based on detected surface reflection characteristics and relative direction information, transforming a static uniform illumination system into a dynamic one that responds to varying object properties and lighting conditions.
2Illumination intensity
If illumination parameters are adjusted for each object's surface characteristics, then lighting uniformity is improved, but the system complexity increases
Solution Approach 1:
The patent applies self-service by enabling the illumination system to automatically characterize objects and adjust its own parameters without external intervention. The controller autonomously determines surface reflection characteristics, calculates appropriate illumination adjustments, and executes the compensation, making the system self-regulating and reducing the need for manual configuration or complex external control mechanisms.
Solution Approach 2:
The patent implements feedback by using the detected surface reflection characteristics and relative direction information to continuously adjust illumination parameters. The system measures object properties, processes this information through the controller, and uses the resulting control signals to modify illumination output, creating a closed-loop feedback system that automatically maintains lighting uniformity.
3Measurement precision
If multiple illumination units are used with adjustable parameters, then illumination compensation precision is improved, but the device complexity and control difficulty increase
Solution Approach 1:
The patent applies segmentation by dividing the illumination task across multiple independent illumination units, each capable of being individually controlled and optimized. Rather than using a single complex light source, the system segments the illumination function into multiple units that can be independently adjusted based on the spatial distribution and reflection characteristics of different objects in the scene.
Solution Approach 2:
The patent implements parameter changes by systematically varying illumination parameters (such as intensity, direction, duration, or spectral composition) of different illumination units based on detected object characteristics. The controller modifies these parameters dynamically to achieve precise compensation for varying surface reflection properties, transforming a fixed-parameter system into one with adjustable parameters optimized for each object.
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 allows for better illumination compensation, resulting in improved photography effects by determining and adjusting illumination parameters based on surface shape characteristics and relative directions, ensuring uniform lighting and enhancing image quality.
Implementation Method 1
light rays emitted from the illumination apparatus are used to illuminate the scene
Implementation Method 2
obtaining at least one surface reflection characteristic of a photographed side of an object
Data Source
AI summary
A photography illumination compensation method comprises: obtaining a surface shape characteristic of a photographed side of an object in a photographing field of view; obtaining first relative direction information of the object relative to a photography position related to the photographing field of view, obtaining second relative direction information of the object relative to an illumination array comprising multiple illumination units, and adjusting, according to the surface reflection characteristic, the first relative direction information, the second relative direction information, and a set illumination compensation criterion, an illumination parameter of an illumination unit in the illumination array. An illumination parameter of an illumination unit in the illumination array is determined by referring to a surface shape characteristic of the photographed object in the photographing field of view, to perform better illumination compensation for the photographed object in the photographing field of view to enable a required illumination compensation effect.