Terminal Device Brightness Correction for Drawing Extraction
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Solution Overview
Problem
Existing methods for extracting the drawing region from images captured on mobile devices face challenges due to low brightness and non-uniform brightness, especially with point light sources, which can lead to difficulties in accurately identifying and extracting the drawing region.
Innovation Solution
A terminal device with a capturing unit, light emitting unit, processor, and storage that controls the light emission during image capture, performs image correction based on the brightness distribution, and extracts the drawing target from the captured image using a standard image to normalize brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a point light source is used to illuminate the original image, then low brightness can be improved, but non-uniform brightness distribution occurs causing difficulty in extracting the drawing region
Solution Approach 1:
The patent applies parameter changes by correcting the brightness distribution of the captured image through image processing. The processor adjusts the brightness parameters of different regions in the captured image to compensate for the non-uniform illumination caused by the point light source, thereby achieving uniform brightness distribution while maintaining the improved brightness level.
2Illumination intensity
If the light is turned on to solve low brightness, then overall brightness is improved, but non-uniform brightness distribution occurs with bright center and dark periphery
Solution Approach 1:
The patent implements feedback by having the processor analyze the captured image's brightness distribution and automatically adjust the brightness parameters of different regions. The system detects the non-uniform brightness pattern and applies corrective processing to achieve uniform illumination, thereby improving drawing region extraction accuracy while maintaining high overall brightness.
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 accurate and easy extraction of the drawing region by correcting for brightness distribution, improving the accuracy of threshold determination and binarization, thereby enhancing the ability to identify the drawing target in images.
Implementation Method 1
a light emitting unit that emits light
Implementation Method 2
a capturing unit that captures a subject
Data Source
AI summary
A terminal device, comprising: a capturing unit capturing a subject; a light emitting unit; a display unit, a processor, and a storage unit containing a program that causes the processor to execute a process of acquiring a drawing target drawn by a user from a captured image of the subject including the drawing target and causing the drawing target to be displayed on a screen of the display unit, the program causes the processor to execute; controlling the light emitting unit to emit the light when the capturing unit captures the subject according to the user's operation, acquiring the captured image that is obtained by capturing the subject irradiated with the light emitted from the light emitting unit, performing image correction corresponding to a brightness distribution of the light emitted from the light emitting unit on the captured image, and extracting the drawing target from the captured image acquired.