A Cartoon Style Rendering Method Based on Light and Shadow Enhancement
A cartoon and style technology, applied in the field of image rendering, can solve the problems of inability to achieve rendering effect, inability to obtain high-quality image base and light and shadow enhancement map, etc., and achieve the effect of excellent time performance
Inactive Publication Date: 2016-05-18
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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Problems solved by technology
[0003] The traditional cartoon-style rendering technology is relatively simple to extract the image base, and only focuses on the enhancement of the edge of the image, so it is impossible to obtain a high-quality image base and light and shadow enhancement map, and cannot achieve the required rendering effect
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[0011] The present invention will be described in detail below with reference to the accompanying drawings.
[0012] figure 1 is a flowchart of the present invention. Such as figure 1 Shown, the present invention mainly is divided into 7 steps:
[0013] Step 1: Input the source image to be filtered.
[0014] Step 2: Perform a small-scale Gaussian blur on the input image to reduce the edge sharpness, so as to prepare for the subsequent image-based abstraction. Note that the input image is I, and the image after Gaussian filtering is I', then the Gaussian filtering process is shown in formula 1;
[0015] [Formula 1]
[0016] I'(p)=G s *I(p)
[0017] where G s Represents a Gaussian operator with a mean of 0, a radius of 3, and a standard deviation of 1.0, p represents the spatial position of each pixel, I(p) and I'(p) represent the intensity value of the pixel, and the operation * represents convolution.
[0018] Step 3: According to the Gaussian-filtered image I′ obtai...
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The invention relates to a cartoon style rendering method based on light and shadow strengthening. The cartoon style rendering method comprises the following steps: firstly, extracting an abstracted base image with cooperation of the Gaussian filtering and the bilateral filtering to be used for simulating the characteristics of being less in detail of an artistic work and high abstract in content of the artistic work, respectively calculating an image contour diagram and a shadow distribution diagram on the extracted base image, obtaining a light and shadow strengthening layer which is independently drawn in the artistic creation frequently through a fusion method with controllable strength, and finally enabling the light and shadow strengthening layer to be overlapped on the base image so that the final rendering result can be obtained. According to the cartoon style rendering method, the cartoon style work in the artistic creation can be vividly simulated, the time performance is good, and the quasi real-time rendering efficiency can be obtained on a current mainstream multi-core PC.
Description
technical field [0001] The invention relates to an image rendering method, in particular to a cartoon style rendering method based on light and shadow enhancement. Background technique [0002] With the popularization of various digital devices and the emergence of various digital applications, digital entertainment has gradually become an important form of entertainment. In many cases, various applications require a large number of artistic images as materials, and these materials usually require artists to draw manually, which is very inefficient. The image-based cartoon style rendering technology alleviates this problem to a certain extent, which allows users to provide a real image and output corresponding artistic results with cartoon style. [0003] The traditional cartoon-style rendering technology is relatively simple to extract the image base, and only focuses on the enhancement of the edge of the image, so it is impossible to obtain a high-quality image base and l...
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IPC IPC(8): G06T5/00
Inventor 黄华张磊臧彧
Owner BEIJING INSTITUTE OF TECHNOLOGYGY