Reconstructing Concentric Radial Gradients in Vector Graphics
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Solution Overview
Problem
Existing image vectorization techniques struggle to convert raster images to vector graphics while preserving image details, often resulting in loss of information and fidelity, especially when dealing with radial color gradients.
Innovation Solution
An image processing apparatus that receives a raster image depicting a radial color gradient, computes an origin point and color stops, and generates a vector graphics image by constructing a vector graphics representation based on these components, thereby approximating smoothly shaded regions without loss of information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional image vectorization techniques using solid fill paths are used, then the conversion from raster to vector graphics can be achieved, but image details and fidelity are lost
Solution Approach 1:
The patent segments the radial color gradient into multiple concentric radial gradient layers, each representing a specific color range. This segmentation allows precise representation of color transitions while maintaining vector format, thereby preserving image fidelity without requiring complex solid fill paths.
Solution Approach 2:
The patent transforms the representation parameters from solid fill paths to concentric radial gradient parameters (center point, radius, color stops). This parameter change enables the vector graphics to inherently represent radial color gradients, preserving image details while simplifying the manufacturing process.
2Object-generated harmful factors
If solid fill paths are used for vectorization, then the vector graphics can be generated, but artifacts appear in the output image
Solution Approach 1:
The patent changes the fundamental parameters of vector representation from solid fills to radial gradients with color stops. This parameter transformation eliminates artifacts by naturally representing smooth color transitions, while maintaining high productivity through automated detection of gradient parameters.
3Manufacturing precision
If conventional vectorization methods are used, then the raster image can be converted to vector graphics, but smoothly shaded regions are not preserved
Solution Approach 1:
The patent performs preliminary detection of the radial color gradient parameters (center point, radius, color stops) from the raster image before generating the vector graphics. This preliminary action ensures that smoothly shaded regions are accurately preserved in the vector format, while the automated nature of this detection keeps the algorithm complexity manageable.
Data Source
AI summary
Systems and methods for image processing are described. Embodiments of the present disclosure receive a raster image depicting a radial color gradient; compute an origin point of the radial color gradient based on an orthogonality measure between a color gradient vector at a point in the raster image and a relative position vector between the point and the origin point; construct a vector graphics representation of the radial color gradient based on the origin point; and generate a vector graphics image depicting the radial color gradient based on the vector graphics representation.