CN1277112A

CN1277112A - Automatic head sculpture making system using parallel light method

Info

Publication number: CN1277112A
Application number: CN 99108143
Authority: CN
Inventors: 张吉州; 张晓东
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-06-11
Filing date: 1999-06-11
Publication date: 2000-12-20
Anticipated expiration: 2019-06-11
Also published as: CN1094839C

Abstract

The present invention combines the computerized visual treatment and automatic machining. After the calibration figure and the facial image data are entered into a computer by video camera, stereo facial shape is found out through operating a processing program. Head and other parameters measured with a scale are then entered into the computer to fit a complete three dimensional head sculpture on the screen. After modification on hairstyle, elevation angle, facial expression, etc., three dimensional head sculpture is carved automatically by a mechanical equipment. The said system is also suitable for carving other three dimensional image, such as fine mold.

Description

Automatic head sculpture making system using parallel light method

Automatic head sculpture making system using parallel light method relates to computer vision and processes two fields automatically.

Engraving system in the past generally is used for plane processing, is 1051012 patent etc. as notification number.Be used for three-dimensional processing also need to be based upon brought certain trouble to incised work in manually-operated basis.Also be not used at present the three-dimensional head portrait system of engraving automatically.Feature of the present invention is by the processing of computer, will be engraved as three-dimensional head portrait automatically with head part's image that directional light face method is taken.The operation principle of system, part and using method are as follows.

One, operation principle

During with one group of directional light face vertical irradiation one plane, the light face forms one group of parallel bright line with Plane intersects, and is shown in Figure 1.To the camera shooting Fig. 1 on plane, treated computer can obtain the information of camera space position, i.e. camera calibration with tiltedly.

Before the head part was in the plane, when facial, the light face forms a suite shape bright line with facial intersecting, and was shown in Figure 2 with same directional light face vertical irradiation.Obviously, any point is exactly the information of facial this some projection to the vertical range on plane on the curve.The set of facial each point has just constituted curve one by one on light face and the facial intersection.Camera with calibration is shot curve image shown in Figure 2.By the processing to Fig. 1, Fig. 2, computer just identifies the shape of every curve, and it is arranged in order, just can present facial three-dimensional shape.

Measure other parameter information of head with scale, the input computer, treated, can on screen, simulate complete head 3-D view.3-D view is modified, can be started the procedure of computer after the satisfaction, the control plant equipment is carved out three-dimensional head portrait automatically.

Two, part

Fig. 3 forms schematic diagram for system.Wherein 1 is light source, and 2 is seat, and 3 is camera, and 4 is computer, and 5 is the Mechanical Driven circuit, and 6 is photoelectric source, and 7 is mechanical device, and 8 is mold.21 is that computer parallel port 1,22 is a computer parallel port 2, and the structure and the function of each several part are as follows.

1, light source.Its structure as shown in Figure 4.9 is condenser mirror among Fig. 4,10 is flash lamp, 11 is the collector lens group, and 12 for being carved with the light slit plate of vertical parallel transmitted light narrow slit, and 13 is the reflective mirror that can rotate around the axis, 14 is imaging lens, 15 is extension sleeve, and 16 is stationary mirror, and 17 for transparent and be carved with the scale of coordinate system, 18 is magnifying glass, and 19 is the light source imaging plane.The major function of light source is the relative position that produces directional light face, observation and adjustment each several part.When reflective mirror 13 was dug, the light that flash lamp sends formed parallel bright line through speculum 9, collector lens group 11, light slit plate 12 and imaging lens 14 on imaging plane 19.Choose the long imaging lens 14 of focal length, rationally adjust extension sleeve 15, just can in one segment distance of 19 front and back, plane, obtain desirable directional light face.When reflective mirror 13 puts down, be in the object at imaging plane 19 places, will be in scale 17 places imaging, can observe the imaging situation and adjust by magnifying glass 18.Can on scale 17, read simultaneously the relevant data of picture.

2, seat.The backrest of seat is made the plane, is imaging plane 19, as the datum plane of imaging.

3, camera.Be used for photographic images,, be connected on the computer parallel port 1 to the computer input image information.Under the control of computer, work asynchronously with light source.

4, computer.Be the core of system, be used for Image Information Processing, demonstration, modification and various control.

5, mechanical device drive circuit.During the receiving computer order, drive synchronous motor, drive mechanical part work.Changing-over is on computer parallel port 1.

6, photoelectric source.When computer sends instruction, light flash lamp.It is by first control of computer parallel port 2.

7, mechanical part.Its main processing component is a cutter head 20 with 4 frees degree, and is shown in Figure 5.4 frees degree are respectively motions and rotating in the Y-Z plane on X, Y, Z direction.

8, mold.Be used for the casting of ferrule picture.

Three, using method.

Whole operation will be through adjusting the each several part relative position and measuring other steric parameter of head; Take facial and the calibration image; Computer Processing and modification; Steps such as control processing and the casting of ferrule picture.

1, adjusts the position, measure header parameter.

Adjust the position of light source and seat, make the planar light vertical irradiation chair back 19 of light source, and present parallel thin bright line, height is suitable.

Allow the one be shooted be sitting on the seat, near the chair back.Put down reflective mirror 13, observe, adjust people's sitting posture seat.Make light source coordinate system initial point aim at center at the bottom of the nose, vertical coordinate is aimed at facial center line, and is shown in Figure 6.Read the crown from scale this moment, lower limb on the ear, and the data of hair style, and measure the data of ear to the chair back.

Adjust the position of camera, make it, and can take complete face irradiation image tiltedly to plane 19.

2, take facial and calibration irradiation image.Camera, photoelectric source plug are inserted respectively on the computer parallel port 1,2.Dig reflective mirror 13, open computer, the operation photographing program knocks keyboard, takes facial irradiation image, called after image file 1.Allow the people leave seat, knock keyboard once more, take calibration irradiation image, called after image file 2.

3, image is handled and is modified.After obtaining two files of image, the runs image processing program, and input institute gauge head portion have a related parameter, computer just can simulate complete head stereo-picture, is presented on the screen.Can modify this moment to hair style, pitch angle, facial expression etc., reach satisfied after, with stereo-picture input data file 1, shut down computer.

4, the processing of image.Pull up camera, photoelectric source plug, the plug of Mechanical Driven circuit is inserted on the parallel port 1 of computer.Prefabricated gypsum or wax head portrait mould base are contained on the process equipment.Open computer, the operation procedure.This program is opened data file 1, controls cutter operation automatically, processes and shows identical three-dimensional statue.

Add and to process face earlier man-hour, then processing left side, right side and the crown.And process can divide several times and carry out, use the cutter head of different accuracy to finish successively, till satisfaction.

5, the making of ferrule picture.If expect the ferrule picture, the available head portrait of carving is cast as head mould.

The engraving of three-dimensional head portrait is a very complicated technology.The present invention adopts the irradiation of directional light face, and developing computer reading graph, match, modification and control processing have been opened up new approach for three-dimensional head portrait artistic carving, have both improved precision, have improved efficient again.For other object, can carve out 3-D graphic equally with this system, as manufacturing of precision die etc.Therefore, its use prospect is very wide.

Claims

1, a kind of automatic head sculpture making system using parallel light method is made up of light source, photoelectric source, camera, computer, mechanical device, mechanical device drive circuit, light source imaging plane and mold.It is characterized in that light source controlled by photoelectric source, photoelectric source is connected on the computer parallel port 2 with plug.Camera is connected on the computer parallel port 1 with plug, works asynchronously with light source under computer control.Mechanical device is controlled by drive circuit, and the mechanical device drive circuit uses the plug changing-over on computer parallel port 1.Mechanical device processing to as if head portrait mould base.

2, the described light source of claim 1 is characterized in that the scale 17 that device is carved with the light slit plate 12 of vertical parallel transmitted light narrow slit, the reflective mirror 13 that can pivot and is carved with coordinate system in the light source.

3, the described mechanical device of claim 1, the main engraving parts that it is characterized in that it are the cutter head 20 with 4 frees degree, the specification size of cutter head can be different.

4, the described head portrait mould of claim 1 base is that gypsum, wax and other easy material processed are made.

5, the described engraving system of claim 1 can be used for the engraving of other object dimensional figure.

6, claims 1 described mold is characterized in that the head portrait that is used for engraving is cast as the ferrule picture.