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Gradient correction and multi-direction texture extraction-based sketch generation method and device

A texture extraction and gradient correction technology, applied in the field of image processing, can solve problems such as unreal pictures and information loss

Inactive Publication Date: 2017-05-24
HENAN UNIVERSITY OF TECHNOLOGY
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a sketch generation method and device based on gradient correction and multi-directional texture extraction to solve the problem of unrealistic pictures due to information loss caused by using a single texture direction in the existing sketch generation method question

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  • Gradient correction and multi-direction texture extraction-based sketch generation method and device

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Embodiment Construction

[0082] The specific embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0083] The steps of the sketch generation method based on gradient correction and multi-directional texture extraction of the present invention are as follows:

[0084] 1. The original image is used as the input image for grayscale transformation to obtain a grayscale image.

[0085] 2. Use multi-scale morphological opening and closing reconstruction operations to process the grayscale image to obtain a preprocessed image.

[0086] The multi-scale morphological opening and closing reconstruction operation is to use structural elements of different sizes to perform morphological opening and closing reconstruction operations on the grayscale image, and the processing results are added and averaged to obtain a preprocessed image. In the multi-scale morphological opening and closing reconstruction operation, the multi-scale structural ...

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Abstract

The invention provides a gradient correction and multi-direction texture extraction-based sketch generation method and device. The method comprises the following steps of: carrying out grayscale transformation on an input image to obtain a grayscale image; processing the grayscale image to obtain a pre-processed image, and segmenting the pre-processed image to obtain a segmented image; carrying out gradient processing on the grayscale image to obtain gradient information; determining a texture direction of each segmented region of the segmented image according to the gradient information; generating a white noise image according to the input image; combining the texture direction of each segmented region of the segmented image and the white noise image to generate a texture map; processing the input image to obtain an outline map; and fusing the texture map and the outline map to generate a sketch. According to the method and device, multidirectional textures are used, so that the generated sketch is close to a real freehand sketch and the sketch effect is richer and more alive.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a sketch generation method and device based on gradient correction and multi-directional texture extraction. Background technique [0002] Images can be seen in the update of personal dynamics in the circle of friends, playing selfies, etc.; at the same time, there are also a large number of image browsing, sharing and downloading on the Internet, and the corresponding image processing technology has attracted more and more attention. In the image processing technology, the stylized processing of the image and the addition of artistic effects are very popular with everyone. Sketch is a relatively common and basic way of expression in image art. However, for the artificial creation of sketches, the creator must have certain art skills and design capabilities, and at the same time, the individual's artistic level will also greatly affect the performance of the...

Claims

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Application Information

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IPC IPC(8): G06T11/00G06T5/00G06T7/10G06T5/50G06T5/30
CPCG06T5/30G06T5/50G06T11/001G06T2207/20221G06T2207/20182G06T5/92G06T5/70
Inventor 梁义涛李亚飞赵奎斌史卫亚王锋李岚张猛胡江汇
Owner HENAN UNIVERSITY OF TECHNOLOGY
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