Directional diagram model based human face sketch synthesis method
A face portrait and synthesis method technology, applied in the field of image processing, can solve the problems of face portrait detail distortion, ignoring domain constraints, increasing the complexity of the face portrait, etc., to achieve the effect of obvious details and overcoming the inconspicuous details.
Active Publication Date: 2016-08-17
XIDIAN UNIV
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The disadvantage of this type of method is that the method of linear combination can be regarded as filtering by a low-pass filter, which will filter out some high-frequency detail information, resulting in distortion of the details of the final synthesized face image.
But this method ignores domain constraints, and it is a two-step framework, which increases the complexity of face portrait synthesis
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[0020] refer to figure 1 , the implementation steps of the present invention are as follows:
[0021] Step 1, divide training portrait sample set, training photo sample set and test sample set.
[0022] Take L portraits from the portrait-photo pair set to form a training portrait sample set T R , and take out the training portrait sample set T R One-to-one correspondence of the portraits in L photos constitutes the training photo sample set T E , the remaining portrait-photo pairs form a test sample set, and a test photo A is selected from the test sample set.
[0023] Step 2, divide the portraits in the training portrait sample set and the photos in the training photo sample set into blocks.
[0024] The training image sample set T R The portrait and training photo sample set T in E The photos in are divided into overlapping blocks of the same size.
[0025] Step 3, forming a set of photo blocks to be selected and a set of portrait blocks to be selected.
[0026] Acco...
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The invention discloses a directional diagram model based human face sketch synthesis method and mainly solves the problem of unobvious details of human face image synthesis in the prior art. The directional diagram model based human face sketch synthesis method comprises the following implementation steps of: (1) dividing a training sketch sample set, a training photo sample set and a testing photo sample set; (2) carrying out block division on sketches in the training sketch sample set, photos in the training photo sample set and testing photos; (3) forming a to-be-selected photo block set and a to-be-selected sketch block set according to the divided image blocks; (4) extracting pixel value characteristics and directional characteristics for a training sketch sample block set and a photo sample block set; (5) calculating a to-be-selected sketch block weight set; (6) calculating a pseudo-sketch block set according to the to-be-selected sketch block weight set; and (7) generating a pseudo sketch according to the pseudo-sketch block set. According to the directional diagram model based human face sketch synthesis method, because the domain constraint of a human face image body is considered, detail parts of a generated human face sketch are obvious, and the method can be used for human face retrieval and recognition in the field of public security.
Description
technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a face portrait synthesis method, which can be used for face retrieval and recognition in the field of public security. Background technique [0002] Face-based identification technology is one of the most convenient and effective identification technologies in public security management. For example, in the case of criminal investigation, when it is difficult to obtain photos of the suspect due to objective reasons, the forensic doctor can draw a portrait of the suspect based on the description of the witnesses. However, due to the different imaging principles of photos and portraits, there are large differences in shape and texture, which brings many difficulties to face recognition based on portraits. Face portrait synthesis technology is to convert the photos in the police face database into fake portraits through image processing technology, and then th...
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IPC IPC(8): G06T5/50G06K9/00G06K9/62
CPCG06T5/50G06T2207/10004G06T2207/20212G06V40/161G06V40/172G06F18/23213
Inventor 高新波张宇航王楠楠李洁孙雷雨朱明瑞于昕晔彭春蕾马卓奇曹兵查文锦
Owner XIDIAN UNIV