CN1797474A - Fast method for posting players to electronic game - Google Patents
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Abstract
The invention is a fast player posting method in an electronic game, relates to the field of 3D image processing technique, comprising: making detection and key point location on the right face of a player detected by a camera so as to be able to accurately obtain human face characteristic information; according to 3D human face database, building a corresponding relation between right and side face parameters, estimating the depth information of face characteristic points of the player; using the detection results, obtaining a face outline texture diagram to form a face texture diagram; using the radius basic function interpolation to deform standard model and making texture fitting, and obtaining a real face model of the player, thus strengthening the immersing sense of the player.
Description
Technical field
The present invention relates to 3-D view processing technology field, particularly electronic game, pattern-recognition and computer graphics, fast method for posting players in a kind of electronic game of automatic generation of game role and personalized three-dimensional people face rapid modeling technology.
Background technology
An important development trend of current recreation is to have authenticity and feeling of immersion, if game role is become game player's image, then more can increase game player's feeling of immersion, increases game player's interest.This just relates to people's face modeling technique.The modeling of people's face is as a research of computer graphics branch, and in more than 30 year, the effort through the scientific worker has obtained very much progress in the past.Along with the continuous increase in the application demand in fields such as man-machine interface, interactive game, multimedia, virtual reality, people's face modeling technique becomes current research focus again.The modeling of personalized three-dimensional people face mainly comprises three part work: people's face three-dimensional data is obtained, the foundation of people's face master pattern and game player faceform's formation, and obtaining of people's face three-dimensional data is the basis that forms the game player faceform.Now commonly used have a method based on computer vision such as laser scanner, structured light, passive stereoscopic vision, but this method cost is than higher, be difficult to popularize, and people's face three-dimensional data information of obtaining has only shape and do not have structural information, the noise ratio of data is bigger.Faceform for the game player that obtains can be used for animation, generally be since a structurized face wire frame model, obtain the information of game player people's face, remove match, distortion master pattern again by method based on image, stick texture, obtain specific people's three-dimensional model.People's face detects and key point is located a kind of requisite support technology that obtains game player's face characteristic dot information just.MPEG-4 has defined 84 unique points on the face in neutrality, and facial model needs these unique points to define suitable shape.Unique point is divided into several groups, for example cheek, eyes and mouth.So-called people's face detects and the key point location detects the people position of these unique points on the face exactly in multi-medium data (as digital signals such as image, videos).
Summary of the invention
The purpose of this invention is to provide a kind of common camera that utilizes, utilization people face detects and the key point location technology obtains front face characteristic point information (x, y direction), estimate unique point depth information (z direction), head model to role personage in the recreation is out of shape then, carry out texture, fast the role in the electronic game is replaced to game player's method.Particularly electronic game, pattern-recognition and computer graphics, fast method for posting players in a kind of electronic game of automatic generation of game role and personalized three-dimensional people face rapid modeling technology.
For achieving the above object, fast method for posting players in this electronic game, key step comprises as follows:
1. utilize common camera that game player people's face is detected, determine that earlier people's position approximate of being bold puts, the face key point of choosing then location technology obtains the two-dimensional signal (x, y direction) of front face unique point, and obtains the front face texture maps according to people's face testing result;
2. the three-dimensional face database that utilizes spatial digitizer to set up goes out people from side face parameter according to the front face parameter estimation, obtains the depth information (z direction) of human face characteristic point;
3. utilize the head model (master pattern) of role personage in the unique point changeable shape game of playing household's face, carry out the texture match, obtain game player's human face three-dimensional model.
Description of drawings
Fig. 1 is a fast method for posting players The general frame in the electronic game of the present invention.
Fig. 2 is people's face texture mapping process flow diagram of the present invention.
Fig. 3 is the process flow diagram of depth information method of estimation of the present invention.
The quick imbedding system figure of Fig. 4 player.
Fig. 5 is people's face distortion of the present invention and texture match process flow diagram.
Embodiment
Fast method for posting players in the electronic game, game player people's face modeling process as shown in Figure 1, concrete steps are as follows:
S1.1, people's face detects and the key point location: game player's image that common camera is taken in carries out the detection of people's face, determine the Position Approximate of people's face earlier, find out unique point on the front face with the key point location technology then, these unique points are divided into five groups of face, eyes, nose, eyebrow and profiles, obtain the two-dimensional signal (x, y value) of unique point, and obtain the texture maps of front face, calculate facial color average, to the outer field color equalization of face profile, merge ear, tooth texture, form a texture mapping;
S1.2, depth information is estimated: 100 Chinese faceforms that utilize spatial digitizer to set up are carried out pre-service, obtain the three-dimensional data of corresponding unique point, utilize the least square difference to set up the corresponding relation of positive parameter of people's face and side parameter.So-called positive parameter refers to the distance of two unique points on the XY plane.So-called side parameter refers to the distance of two unique points on the YZ plane.Utilize the positive parameter of detected people's face then, estimate the side parameter of people's face automatically, thereby obtain the depth information (z value) of unique point;
S1.3, people's face distortion: in 3d gaming, pre-determine out the position of characteristic of correspondence point on role's the faceform, utilize the game player people's face three-dimensional feature point that obtains noted earlier, use radius basis function interpolation method, the distortion master pattern obtains the game player faceform;
S1.4, the texture match: front and side to the headform are calculated texture coordinate respectively, obtain real game player people's face.
Game player people's face texture mapping forms the specific implementation step:
Figure 2 shows that game player people's face texture mapping schematic flow sheet, be described as follows:
S2.1, beginning: common camera begins to detect game player people's face;
S2.2, people's face detects and obtains the front face characteristic point data: the method for detecting human face detection and location go out the two-dimensional signal (XY plane) of front face unique point, and store detected face texture image;
S2.3 calculates facial color average: to the people's face portion image that obtains in (2), calculate the mean value of color;
S2.4, the field color equalization that the face profile is outer: the color for the outer zone of facial contour is made as the color average that calculates in (3);
S2.5, texture merges: set up a big texture image, the mean value that color value obtains for (3), of the mean value equalization of preprepared ear texture image by people's face color, merge on the large texture image, face texture image and preprepared tooth texture image that (2) are obtained also merge on the large texture image;
S2.6, ear, facial edge are smooth: ear is carried out edge smoothing in large texture edge of image pixel, eliminate seam, facial contour is carried out edge smoothing in large texture edge of image pixel, eliminate seam.
Depth information method of estimation specific implementation step:
Figure 3 shows that the process flow diagram of depth information method of estimation.Be described as follows:
S3.1, the three-dimensional face database pre-service, set up positive parameter of people's face and side parameter corresponding relation: the three-dimensional face data of setting up with spatial digitizer are simplified processing, and remove redundant data, only remaining face data, selected chin obtains the relative coordinate of unique point on each model as benchmark, determine positive parameter of people's face and side parameter, determine the related coefficient of positive parameter and side parameter according to the least square difference;
S3.2, calculate the positive parameter of people's face: the result who utilizes people's face to detect, obtained the two-dimensional signal (x, y value) of the unique point of game player's front face, (1) selected identical benchmark, and be multiplied by corresponding variation factor, unified mutually with the data value of face database, thus the positive parameter of game player people's face can be set up;
S3.3, estimate people's face side parameter: the positive parameter that utilization (1) obtains and the related coefficient of side parameter can be gone out people from side face parameter of this people by the positive parameter estimation of game player people's face;
S3.4 obtains the unique point depth information: utilize people from side face parameter, can obtain the unique point depth information.
Distortion of people's face and texture match specific implementation step:
Shown in Figure 5 is that people's face is out of shape and texture match schematic flow sheet, is described as follows:
S5.1, unique point numbered magnitude normalization:, the face characteristic point data that detects is carried out normalization according to the overall dimensions (length and width are dark) of master pattern and game player people's face;
S5.2, the displacement of calculation control point: the people on the face these unique points calculate their displacements between master pattern and game player people's face as the reference mark;
S5.3, calculation control point deformation coefficient: according to radius basis function interpolation method, the deformation coefficient of calculation control point from master pattern to game player's model;
S5.4, master pattern overall dimensions coupling: adopt and the depth information method of estimation in identical benchmark, the relative size of basis of calculation model is considered the overall dimensions of game player people's face, the size of variation master pattern is carried out whole matching;
S5.5, the displacement of each point of computation model: the deformation coefficient at the reference mark that obtains according to (3), the displacement of each point of basis of calculation model, thus obtain the game player faceform;
S5.6, texture coordinate calculates: according to linear interpolation, calculate the texture coordinate of people's face front, side, the crown and neck respectively.People's face front is the detected scope of people's face;
S5.7, replace tooth, ear texture: the texture coordinate of ear and tooth needs to calculate in advance, physical dimension and their texture mapping separately according to ear and tooth, can obtain their texture coordinate according to linear interpolation, according to they positions (position is constant before and after distortion) in new game player people's face, replace to precalculated texture coordinate then.
Claims (12)
1, fast method for posting players in a kind of electronic game is characterized in that the player inserts fast in the electronic game.
2, fast method for posting players in a kind of electronic game, fast method for posting players comprises in the electronic game: detect game player people's face from camera, obtain front face unique point (x, y value) data; According to the three-dimensional face database of having set up, estimate human face characteristic point depth information (z value); According to game player's human face characteristic point three-dimensional information, the distortion master pattern carries out the texture match, obtains real game player's model, strengthens game player's feeling of immersion.
3, by the described method of claim 2, it is characterized in that, also comprise step: utilize common camera to detect game player's front face, obtain the two-dimensional signal of unique point on game player's front face.
4, by the described method of claim 2, it is characterized in that, also comprise step: according to the face database of spatial digitizer foundation, utilize least squares error to set up the corresponding relation of positive parameter of people's face and side parameter, according to the game player people's face positive information that detects, estimate people's face side-information.
5, by the described method of claim 2, it is characterized in that, also comprise step: utilize game player people's face testing result, obtain the facial contour texture, calculate people's face average color, merge ear and tooth texture, form whole game player people's face texture maps.
6, by the described method of claim 2, it is characterized in that, also comprise step: the game player's human face characteristic point that utilizes people's face to detect and estimate to finish, with radius basis function method distortion master pattern, carry out the texture match, obtain game player game player people face, strengthen game player's feeling of immersion.
7, fast method for posting players in a kind of electronic game, key step is as follows:
1. utilize common camera that game player people's face is detected, determine that earlier people's position approximate of being bold puts, the face key point of choosing then location technology obtains the two-dimensional signal of front face unique point, and obtains the front face texture maps according to people's face testing result;
2. the three-dimensional face database that utilizes spatial digitizer to set up goes out people from side face parameter according to the front face parameter estimation, obtains the depth information of human face characteristic point;
3. utilize the head model of role personage in the unique point changeable shape game of playing household's face, carry out the texture match, obtain game player's human face three-dimensional model.
8, according to fast method for posting players in the electronic game of claim 7, its concrete steps are as follows:
S1.1, people's face detects and the key point location: game player's image that common camera is taken in carries out the detection of people's face, determine the Position Approximate of people's face earlier, find out unique point on the front face with the key point location technology then, these unique points are divided into five groups of face, eyes, nose, eyebrow and profiles, obtain the two-dimensional signal (x, y value) of unique point, and obtain the texture maps of front face, calculate facial color average, to the outer field color equalization of face profile, merge ear, tooth texture, form a texture mapping;
S1.2, depth information is estimated: carry out pre-service to utilizing spatial digitizer to set up the faceform, obtain the three-dimensional data of corresponding unique point, utilize the least square difference to set up the corresponding relation of positive parameter of people's face and side parameter;
S1.3, people's face distortion: in 3d gaming, pre-determine out the position of characteristic of correspondence point on role's the faceform, utilize the game player people's face three-dimensional feature point that obtains noted earlier, use radius basis function interpolation method, the distortion master pattern obtains the game player faceform;
S 1.4, the texture match: front and side to the headform are calculated texture coordinate respectively, obtain real game player people's face.
9, fast method for posting players in the electronic game according to Claim 8, it is characterized in that, depth information is estimated: so-called positive parameter, refer to the distance of two unique points on the XY plane, so-called side parameter refers to the distance of two unique points on the YZ plane, utilizes the positive parameter of detected people's face then, automatically estimate the side parameter of people's face, thereby obtain the depth information of unique point.
10, according to fast method for posting players in the electronic game of claim 7 or 8, it is characterized in that, game player people's face texture mapping method, its step is as follows:
S2.1, beginning: common camera begins to detect game player people's face;
S2.2, people's face detects and obtains the front face characteristic point data: the method for detecting human face detection and location go out the two-dimensional signal (XY plane) of front face unique point, and store detected face texture image;
S2.3 calculates facial color average: to the people's face portion image that obtains among the S2.2, calculate the mean value of color;
S2.4, the field color equalization that the face profile is outer: the color for the outer zone of facial contour is made as the color average that calculates among the S2.3;
S2.5, texture merges: set up a big texture image, color value is the mean value that S2.3 obtains, of the mean value equalization of preprepared ear texture image by people's face color, merge on the large texture image, face texture image and preprepared tooth texture image that S2.2 is obtained also merge on the large texture image;
S2.6, ear, facial edge are smooth: ear is carried out edge smoothing in large texture edge of image pixel, eliminate seam, facial contour is carried out edge smoothing in large texture edge of image pixel, eliminate seam.
11, according to fast method for posting players in the electronic game of claim 7 or 8, it is characterized in that, the depth information method of estimation, its step is as follows:
S3.1, the three-dimensional face database pre-service, set up positive parameter of people's face and side parameter corresponding relation: the three-dimensional face data of setting up with spatial digitizer are simplified processing, and remove redundant data, only remaining face data, selected chin obtains the relative coordinate of unique point on each model as benchmark, determine positive parameter of people's face and side parameter, determine the related coefficient of positive parameter and side parameter according to the least square difference;
S3.2, calculate the positive parameter of people's face: the result who utilizes people's face to detect, obtained the two-dimensional signal (x, y value) of the unique point of game player's front face, with the selected identical benchmark of S3.1, and be multiplied by corresponding variation factor, unified mutually with the data value of face database, thus the positive parameter of game player people's face can be set up;
S3.3 estimates people's face side parameter: utilize the positive parameter that S3.1 obtains and the related coefficient of side parameter, can be gone out people from side face parameter of this people by the positive parameter estimation of game player people's face;
S3.4 obtains the unique point depth information: utilize people from side face parameter, can obtain the unique point depth information.
12, according to fast method for posting players in the electronic game of claim 7 or 8, it is characterized in that, distortion of people's face and texture match, its step is as follows:
S5.1, unique point numbered magnitude normalization:, the face characteristic point data that detects is carried out normalization according to the overall dimensions of master pattern and game player people's face;
S5.2, the displacement of calculation control point: the people on the face these unique points calculate their displacements between master pattern and game player people's face as the reference mark;
S5.3, calculation control point deformation coefficient: according to radius basis function interpolation method, the deformation coefficient of calculation control point from master pattern to game player's model;
S5.4, master pattern overall dimensions coupling: adopt and the depth information method of estimation in identical benchmark, the relative size of basis of calculation model is considered the overall dimensions of game player people's face, the size of variation master pattern is carried out whole matching;
S5.5, the displacement of each point of computation model: the deformation coefficient at the reference mark that obtains according to S5.3, the displacement of each point of basis of calculation model, thus obtain the game player faceform;
S5.6, texture coordinate calculates: according to linear interpolation, calculate the texture coordinate of people's face front, side, the crown and neck respectively.People's face front is the detected scope of people's face;
S5.7, replace tooth, ear texture: the texture coordinate of ear and tooth needs to calculate in advance, physical dimension and their texture mapping separately according to ear and tooth, can obtain their texture coordinate according to linear interpolation, according to they positions in new game player people's face, replace to precalculated texture coordinate then.
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| CN101561874B (en) * | 2008-07-17 | 2011-10-26 | 清华大学 | Method for recognizing face images |
| CN102755745A (en) * | 2012-07-31 | 2012-10-31 | 曾珠峰 | Whole-body simulation game equipment |
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| CN103430218A (en) * | 2011-03-21 | 2013-12-04 | 英特尔公司 | Method of augmented makeover with 3d face modeling and landmark alignment |
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| CN110533761B (en) * | 2018-05-23 | 2024-01-12 | 华硕电脑股份有限公司 | Image display method, electronic device and non-transient computer readable recording medium |
| CN109260706A (en) * | 2018-09-28 | 2019-01-25 | 联想(北京)有限公司 | Information processing method and electronic equipment |
| CN109675315A (en) * | 2018-12-27 | 2019-04-26 | 网易（杭州）网络有限公司 | Generation method, device, processor and the terminal of avatar model |
| WO2020133862A1 (en) * | 2018-12-27 | 2020-07-02 | 网易（杭州）网络有限公司 | Method and apparatus for generating game character model, processor, and terminal |
| US11839820B2 (en) | 2018-12-27 | 2023-12-12 | Netease (Hangzhou) Network Co., Ltd. | Method and apparatus for generating game character model, processor, and terminal |
| WO2020248682A1 (en) * | 2019-06-10 | 2020-12-17 | 海信视像科技股份有限公司 | Display device and virtual scene generation method |
| CN110755847A (en) * | 2019-10-30 | 2020-02-07 | 腾讯科技（深圳）有限公司 | Virtual operation object generation method and device, storage medium and electronic device |
| US11380037B2 (en) | 2019-10-30 | 2022-07-05 | Tencent Technology (Shenzhen) Company Limited | Method and apparatus for generating virtual operating object, storage medium, and electronic device |
| CN110755847B (en) * | 2019-10-30 | 2021-03-16 | 腾讯科技（深圳）有限公司 | Virtual operation object generation method and device, storage medium and electronic device |
| WO2022022192A1 (en) * | 2020-07-29 | 2022-02-03 | 腾讯科技（深圳）有限公司 | Image processing method and apparatus, computer device, and storage medium |
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