A method of generating relief effect from Thangka line drawing

A technique of Thangka line and relief, applied in the field of Thangka line drawing to generate relief effect, can solve the problems of complicated Thangka painting lines, time-consuming drawing, complicated craftsmanship, etc., and achieve great flexibility, improve efficiency, and facilitate dissemination. Effect

Active Publication Date: 2018-04-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thangka paintings have intricate lines and rich colors, and it takes a long time to draw
Making reliefs on the basis of Thangka paintings is even more complicated and costly

Method used

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  • A method of generating relief effect from Thangka line drawing
  • A method of generating relief effect from Thangka line drawing
  • A method of generating relief effect from Thangka line drawing

Examples

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Embodiment Construction

[0084] Further illustrate the present invention below in conjunction with accompanying drawing.

[0085] 1) Use image processing software to simply repair the noise of the thangka line drawing, and connect broken lines;

[0086] 2) Thinning the image, thinning the image into a single-pixel line drawing connected by eight neighborhoods, such as figure 1 , using an eight-neighborhood template, for each foreground pixel point P, examine the eight points of its eight-neighborhood pixel point P0-P7. Counterclockwise from its right adjacent pixels are defined as P0-P7. Specify a foreground color of 1 and a background color of 0. Point P can only be marked when the following four conditions are met at the same time:

[0087] 2≤N(P)≤6

[0088] S(P)=1

[0089] P2*P0*P6=0

[0090] P0*P6*P4=0

[0091] Among them, N(P) is the number of non-zero points in the 8 neighborhood points of P. S(P) is the number of times the pixel value changes from 0 to 1 when it rotates counterclockwis...

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Abstract

The invention discloses a method for generating the embossment effect via the tracing of thangka lines. The method includes following steps: the tracing of the thangka lines is performed, noise repairing is performed, and broken lines are connected; an image is thinned to a single-pixel line map with eight connected neighborhoods; according to different areas of a pattern, the image is segmented into a plurality of images for being filled, and each filled image is an embossment area; when a part of a certain image is shielded, the part is expanded; a Poisson's equation model is built for each embossment area, and constraint conditions thereof are provided; the height of each point in each embossment area is solved and obtained, and a height map corresponding to the area is obtained; and the preview of a thangka model is generated via triangularization of the height map, the height maps of the areas are superposed and then triangularized, and a finally thangka embossment is obtained. According to the method, the cost for manual drawing of thangka and the manufacture of the embossment based on the manual drawing of thangka can be avoided, the background of thangka or the combination of different patterns can be changed, the three-dimensional embossment effect is directly generated, the cost is lowered, and the spreading is facilitated.

Description

technical field [0001] The invention relates to a method for generating a relief effect, in particular to a method for generating a relief effect from a thangka line drawing. Background technique [0002] Thangka paintings are paintings that represent Buddhist gods, scenes or some kind of mandala on cotton or silk, and are the product of Tibetan Buddhism and cultural development. Thangka relief is a relief carved on a wooden or stone carrier according to a certain proportion with reference to Thangka painting. It is a new form of Tibetan Buddhist art that has emerged in contemporary Sino-Tibetan cultural exchanges. It is important for the development of Tibetan Buddhism and Sino-Tibetan cultural exchanges. are all significant. Thangka paintings have intricate lines and rich colors, and it takes a long time to draw. Making reliefs on the basis of Thangka paintings is even more complex and costly. Therefore, it is of great significance to quickly generate relief effects fro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T15/00G06T17/00
CPCG06T15/00G06T17/00
Inventor 于金辉夏梦
Owner ZHEJIANG UNIV
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