CN201885977U

CN201885977U - Stereoscopic scanning system

Info

Publication number: CN201885977U
Application number: CN201020506003XU
Authority: CN
Inventors: 罗瑞祥
Original assignee: Taiwan Colour and Imaging Tech Corp
Current assignee: Taiwan Colour and Imaging Tech Corp
Priority date: 2010-08-24
Filing date: 2010-08-24
Publication date: 2011-06-29
Anticipated expiration: 2020-08-24

Abstract

The utility model discloses a stereoscopic scanning system for stereoscopically scanning and viewing whether the stereoscopic size of the surface of an object is abnormal, such as unsmoothness or raised foreign matter. The stereoscopic scanning system comprises a light source, an optical lens group, an image sensor and an image processing device, wherein the light source generates strip-shaped emitting light which moves towards the horizontal direction relative to the object, while the optical lens group and the image sensor are associated with the movement of the light source; strip-shaped irradiating light is generated by reflecting or guiding the strip-shaped emitting light by the optical lens group to irradiate the surface of the object; the image sensor receives reflecting light in a projection area of the strip-shaped light of the object to generate image signals; and the image processing device receives the image signals, generates stereoscopic image data by a proper stereoscopic image algorithm and scans state information, for example, whether the surface of the object is abnormal.

Description

The stereoscanning system

Technical field

Whether unusual the utility model relates to a kind of stereoscanning system, especially utilize the strip image sensor to inspect object surface stereoscanning system.

Background technology

Because the three-dimensional size on surface, that is X, Y, Z size, smoothness is occupied sizable quality determinative in a lot of fields, for example, whether the surface that needs the stereoscanning object surface elevation, depression takes place or produces foreign matter to inspect, and whether produces ball top because of friction such as cloth.

In the prior art, mainly be to utilize laser light to project the object surface, take pictures to obtain whole image with camera again, and utilize object surface difference to throw the images of the horizontal level of strip light, carry out the processing of stereopsis algorithm, thereby the generation stereopsis judges whether to take place surface elevation, depression or produces foreign matter to calculate for example level and smooth degree on surface, to use according to required condition again.

The shortcoming of prior art is, laser light refers to shine local surface, be generally the strip region of narrow width, therefore have only in whole image by laser light and refer to that the zone that shines is only the effective coverage that can handle for the stereopsis algorithm, all the other regional image datas all are to be rejected no data, cause the utilization factor of image data quite low, the resource of waste data transmission, slow down processing speed simultaneously, influence the efficient of whole stereoscanning.

Therefore, be sought after a kind of less image sensor sensing that utilizes by the image in the zone of light source irradiation, use the processing of carrying out the stereopsis algorithm, and then inspect for example whether have unusual surperficial, and less image sensor has at a low price and high-resolution advantage, to solve the shortcoming of above-mentioned prior art.

The utility model content

Whether fundamental purpose of the present utility model is in that a kind of stereoscanning system is provided, unusual in order to the surface three-dimensional size of inspecting object, that is the size of X-axis, Y-axis, Z axle.

Stereoscanning described in the utility model system, in order to stereoscanning and inspect the surface of an object and judge whether this surface is unusual surperficial, and this stereoscanning system comprises:

One light source is launched light in order to produce strip, and this strip emission light moves towards horizontal direction with respect to this object;

One optical frames group with this light source interlock, and comprises at least one catoptron, produces strip radiation light in order to reflect this strip emission light, and shines the surface of this object, forms a strip rayed district;

One image sensor, related with the mobile phase of this light source, in order to receiving the reflected light of this object, and produce signal of video signal to this strip rayed district, this signal of video signal comprises the signal of a plurality of imaging points; And

One image processor, comprise video capture device and image data processor, this video capture device receives the signal of video signal of this image sensor, and be sent to this image data processor, carry out the stereopsis algorithm and produce stereopsis data and scanning mode message through this image data processor again, this scanning mode message is unusual surperficial relevant with object, this exception table face comprise that air spots is sliding and have the projection foreign matter at least one of them, this stereopsis algorithm is looked for identical two reference point relative visual angle to this image sensor when the varying level position, described reference point be described imaging point wherein two, this relative visual angle is corresponding to the relative distance parameter of this reference point to this image sensor, and the difference of the relative distance parameter of this adjacent position is represented the level and smooth degree on this surface, during greater than a preset critical, then this surface is regarded as unusual surperficial in this difference.

In the stereoscanning described in the utility model system, described light source is one of them of pointolite and strip light source, and this light source comprises light emitting diode monochromatic light, light emitting diode white light and laser light one of them, this pointolite moved towards vertical direction earlier before moving towards horizontal direction, till the vertical boundary of object, use producing this strip emission light.

In the stereoscanning described in the utility model system, described image sensor comprises one of them of strip image sensor and array-like image sensor.

The stereopsis algorithm is to look for identical two reference point relative visual angle to image sensor when the varying level position, this two reference point is chosen the imaging point in the self imaging signal, the visual angle is corresponding to the relative distance parameter of reference point to image sensor relatively, and the difference of the relative distance parameter of adjacent position is represented the level and smooth degree on object surface, in this difference during greater than a preset critical, then this surface be regarded as unusual surperficial, such as unsmooth or have a projection foreign matter.

Description of drawings

Fig. 1 is the synoptic diagram of stereoscanning of the present utility model system.

Fig. 2 is the operation chart of stereoscanning of the present utility model system.

Fig. 3 is another operation chart of stereoscanning of the present utility model system.

Embodiment

Those skilled in the art below cooperate Figure of description that embodiment of the present utility model is done more detailed description, so that can implement after studying this instructions carefully according to this.

Consult Fig. 1, be the synoptic diagram of stereoscanning of the present utility model system.As shown in Figure 1, stereoscanning of the present utility model system comprises light source 10, optical frames group 20, image sensor 30 and image processor 40, whether unusual in order to the surface 110 of inspecting object 100, that is whether the surface three-dimensional size of object (size of X-axis, Y-axis, Z axle) is unusual, such as unsmooth or have a projection foreign matter.

Light source 10 produces strip emission light L1, and moves towards horizontal direction D1 with respect to object 100.Optical frames group 20 moves towards horizontal direction D1 with light source 10 interlocks, and optical frames group 20 comprises at least one catoptron, in order to reflection strip emission light L1 and produce strip radiation light L2, and the surface 110 of irradiation object 100.Therefore, strip radiation light L2 forms strip rayed district on surface 110, and the width in this strip rayed district is the irradiating width of strip radiation light L2.Image sensor 30 is related with the mobile phase of light source 10, the reflected light R in the strip rayed district on feasible surface 110 is received and generation signal of video signal T by image sensor 30, image processor 40 receives signal of video signal T, and after suitable stereopsis algorithm process, producing stereopsis data Q and scanning mode message M, scanning mode message M represents whether the surface 110 of object 100 is unusual.

Stereoscanning of the present utility model system can further comprise data memory device 50 and display device 60.Data memory device 50 receives and also stores stereopsis data Q, data memory device 50 can comprise internal memory, hard disk, CD and memory card at least one of them.

Display device 60 receives stereopsis data Q, and demonstrates the stereopsis corresponding to stereopsis data Q, and display device 60 also can receive and reading scan message status M simultaneously.Display device 60 can comprise one of them of cathode-ray tube display, LCD, light emitting diode indicator, organic light emitting diode display and electric paper display.

Image processor 40 comprises video capture device and image data processor (not shown), video capture device receives the signal of video signal of image sensor, and be sent to image data processor, after image data processor is carried out the stereopsis algorithm, produce the stereopsis data again and produce the scanning mode message according to required condition enactment.

Consult Fig. 2 and Fig. 3, be operation chart and another operation chart of stereoscanning of the present utility model system.The stereopsis algorithm mainly is from continuous two signal of video signal of varying level position, look for identical two reference point, as the first reference point A among Fig. 2 and Fig. 3 and the second reference point B, wherein the image sensor S1 of Fig. 2 and Fig. 3 and image sensor S2 are illustrated respectively in the same image sensor of the primary importance and the second place, because of image sensor moves towards horizontal direction D1.The first reference point A of Fig. 2 and the second reference point B represent to have identical relative distance with respect to image sensor S1 and image sensor S2, as the first relative distance Z1.The first reference point A of Fig. 3 and the second reference point B represent to have different relative distance with respect to image sensor S1 and image sensor S2, are respectively the first relative distance Z1 and the second relative distance Z2.

First above-mentioned relative distance Z1 and the second relative distance Z2 available first relative view angle theta 1 and the second relative view angle theta 2 are tried to achieve, wherein the first relative view angle theta 1 is the first reference point A and the second reference point B angle with respect to the image sensor S1 of primary importance, and the second relative view angle theta 2 is the first reference point A and the second reference point B angle with respect to the image sensor S2 of the second place, so the visual angle is corresponding to the relative distance parameter of reference point to image sensor relatively.

The difference of the first relative distance Z1 and the second relative distance Z2 is represented the level and smooth degree on the surface of object, therefore, in the difference of the first relative distance Z1 and the second relative distance Z2 during greater than preset critical, this surface can be considered as unusual surperficial, the foreign matter that for example has larger grain size adheres to from the teeth outwards, such as the dust or the grains of sand, or the surface of object makes the surface produce protuberance, depression or unsmooth because of friction or bump, produces ball top or hard plate generation score such as cloth.

Characteristics of the present utility model are, utilize the local surfaces of less image sensor sensing by the object that light source shone, whether the smoothness of using stereoscanning and inspecting the surface have foreign matter, and do not need large-sized image sensor, therefore the speed that can accelerate stereoscanning and inspect reduces the cost of image sensor and the transmission of minimizing image data amount simultaneously.

The above only is in order to explain preferred embodiment of the present utility model; be not that attempt is done any pro forma restriction to the utility model according to this; therefore; all have in that identical creation spirit is following do relevant any modification of the present utility model or change, all must be included in the category of the utility model intention protection.

Claims

1. stereoscanning system, in order to stereoscanning and inspect the surface of an object and judge that whether this surface is unusual surperficial, is characterized in that this stereoscanning system comprises:

2. stereoscanning as claimed in claim 1 system, it is characterized in that, this light source is one of them of pointolite and strip light source, and this light source comprises light emitting diode monochromatic light, light emitting diode white light and laser light one of them, this pointolite moved towards vertical direction earlier before moving towards horizontal direction, till the vertical boundary of object, use producing this strip emission light.

3. stereoscanning as claimed in claim 1 system is characterized in that this image sensor comprises one of them of strip image sensor and array-like image sensor.

4. stereoscanning as claimed in claim 1 system is characterized in that, further comprises a data memory device, in order to the stereopsis data that receive this image data processor and store this stereopsis data.

5. stereoscanning as claimed in claim 4 system is characterized in that, this data memory device comprise internal memory, hard disk, CD and memory card at least one of them.

6. stereoscanning as claimed in claim 1 system, it is characterized in that, further comprise a display device, in order to the stereopsis data and the scanning mode message that receive image sensor and show stereopsis and this scanning mode message, this stereopsis is corresponding to the stereopsis data.

7. stereoscanning as claimed in claim 6 system is characterized in that this display device comprises one of them of cathode-ray tube display, LCD, light emitting diode indicator, organic light emitting diode display and electric paper display.