CN204104638U - A kind of pork laser burns and carves the harvester of stamp - Google Patents

Abstract

The utility model discloses a kind of burning for laser on pork pork skin and carve the image collecting device of stamp.Utilize laser on pork to burn and partly the light of specific wavelength is had to the characteristic of week fluorescent reaction quarter, by shielding visible ray, and the ultraviolet source of specific wavelength is installed on collecting device, laser on pork is burnt and partly produces fluorescence quarter, utilize imageing sensor to gather fluorescence, thus realize laser and burn and carve the IMAQ of stamp.This device has extremely strong noise robustness, by further image processing and analysis, can realize the acquisition of the machine-readable code information in image.

Description

A kind of pork laser burns and carves the harvester of stamp

Technical field

The utility model belongs to acquisition technology field, specifically, relates to a kind of burning for laser on pork and carves the image collecting device of stamp.

Background technology

The blueness quarantine seal of pork upper cover, will be replaced by a kind of laser " identity card " from now on.Laser identity card on pork is a kind of information being fired generation by laser, with laser at pork epidermis code at bright quarter, presents stereo-picture, has concave-convex sense.Live pig laser bright quarantine at quarter mark can be used to promote animal production safety and reviews, and ensures pork product quality safety.

Live pig laser burns and carves without any interpolation material, and the pork can not carved being burnt by laser and surrounding enviroment pollute, and also bring challenge to the recognition of information simultaneously.By various light source and general shooting means, be all difficult to the standard reaching clear acquisition image.

It is utilize imageing sensor that general pattern gathers gimmick, as camera, camera, scanner etc., gathers general things, collects the visible ray that things is launched or reflected, thus obtains the shape color etc. of subject.

Some specific light sources can play good booster action to a certain extent.Under some complicated situations, adopt the light of specific color to irradiate, can obtain or filter some color.As under the irradiation of red light, shooting text, can filter out the interference of the red information such as seal.

For the situation that the background of complexity is close with ambient noise with useful information, be generally difficult to accomplish the filtration to noise.Live pig laser burns and also belongs to this situation quarter.The region of carving of burning seems and not obvious, and some bloodstain, grease can have a strong impact on the visual effect of burning and carving on the contrary, bring difficulty to the collection of image.

Utility model content

In order to solve the problems of the technologies described above, the utility model provides a kind of can burning and carve the image collecting device of stamp information by the upper laser of clear acquisition live pig.

According to great many of experiments, we find the laser of pork burn quarter part to the light of certain specific wavelength, there is faint fluorescence reaction.This phenomenon is different from common several fluorescent materials, and fluorescence is strong, and the most responsive wavelength of fluorescence response is greatly between 390-400nm.The visible ray of shooting environmental, according to this phenomenon, shields by the utility model, carries out light filling by the light source of this specific wavelength, and recycling imageing sensor gathers the pork that laser burns quarter for the wave-length coverage of fluorescence.

IMAQ for wavelength be green be main, away from the wavelength of ultraviolet source, greatly reduce the impact of supplementary lighting sources reverberation on IMAQ effect simultaneously.The composition of the wave-length coverage noise of fluorescence is little, thus can obtain the collection image of very high s/n ratio.Simultaneously can increase the brightness of light filling or utilize other image enhancement technique, obtaining laser clearly and to burn needle drawing picture.

The utility model, compared with existing scheme, has following advantage:

1, signal to noise ratio is high: can obtain the image that laser burns quarter clearly.

2, noise resisting ability is strong: not by the interference of the impurity such as bloodstain, grease.

3, effectively the recognition time is long: along with laser burns the passing of time at quarter, it is very slow that fluorescence phenomenon weakens, and can adapt to distinguish the whole cycle of circulating in the meat field of circulation.Greatly be better than other IMAQ mode.

accompanying drawing explanation

Fig. 1 is collecting device structure chart (overall schematic) of the present utility model.S1 is imageing sensor, is used for obtaining pork laser and burns the image carved.S2 is shading baffle, is used for avoiding the light direct projection of light compensating lamp in the camera lens of imageing sensor.S3 is supplementary lighting sources, be used for illumination, excite pork laser burn quarter part fluorescence reaction.S4 is light shield, is used for shielding extraneous visible ray.Also simultaneously as the main support of image capture device.S5 is the pork that the laser be taken burns quarter.

Fig. 2 is the schematic diagram (supplementary lighting sources schematic diagram) of light filling equipment.

Fig. 3 is the fundamental diagram (baffle plate operating diagram) of shadow shield.

Fig. 4 is the schematic diagram (light shield schematic diagram) of light shield.

Fig. 5 is the spectrogram (supplementary lighting sources spectrum) of supplementary lighting sources.

Fig. 6 is the spectrogram (fluorescence excitation spectrum) of fluorescence excitation.

detailed description of the invention

Graphic and embodiment below will be coordinated to describe embodiment of the present utility model in detail, by this to the utility model how application technology means solve technical problem and the implementation procedure reaching technology effect can fully understand and implement according to this.

The first step: the design of light source.

The selection of light source: light source can select ultraviolet laser, also can select ultraviolet LED.The wavelength main peak LED be distributed between 390-400nm is preferred, relatively economical.In order to the uniformity improving illumination can the LED of selective scattering; The LED of optically focused also can use, if but process the bad uniformity that can reduce illumination.

In order to the uniformity of illumination, light source advises adopting plurality of LEDs jointly to throw light on further, LED is placed in the surrounding of shot object, as Fig. 2.

The brightness of light source is approximately directly proportional to power.Experimentally, adopt the drive circuit of 100mA to 1A to carry out driving LED group, can reach more satisfactory effect, parameter depends on the design parameter of imageing sensor.

LED can be connected with power supply by power supply circuits.In order to illumination is stablized, can adopt current driving circuit, power supply can adopt power supply adaptor, also can adopt powered battery.What dry cell series connection or lithium battery passed through current driving circuit can be this light source power supply.

It should be noted that the light of light source may arrive imageing sensor by direct projection if the imageing sensor shooting angle selected is comparatively large.Directly enter imageing sensor in order to avoid light source and have influence on the normal work of imageing sensor, baffle plate can be set between light source and imageing sensor to block the direct light of light source, thus avoid direct projection light on the impact of imageing sensor.As schemed S3.

Second step: shielding visible ray.

The interference of extraneous visible ray is shielded by light shield.Light shield adopts both ends open, and imageing sensor is placed in one end, the other end reserved shooting window.Light source is positioned at light shield inside, the position that imageing sensor can not directly be taken.As schemed S4.

In order to take guarantee shooting effect, reduce the interference of visible ray, the needing of light shield selects opaque, not have fluorescence reaction material.Namely adopt extraneous light to penetrate to come in, what inside was subject to ultraviolet source excites the material that also can not produce fluorescence.

Light source position can improve the effect of shooting near shooting window end, because if adopt LED as light source, the wave-length coverage of LED is not completely in the scope of our setting, but meets a kind of scope of similar Gaussian Profile, as Fig. 5.Main wavelength is in the scope that we set, and the light of other wavelength, especially visible ray still has certain ratio.If light source distance imageing sensor is comparatively near, understands some and enter imageing sensor by the mirror-reflection of pig skin surfaces grease and affect shooting effect.

Can the material of light reflection ultraviolet if light shield inside adopts, by the repeatedly diffuse reflection of light, the uniformity of illumination also can be improved.

3rd step: imageing sensor.

Imageing sensor can select general imageing sensor as: digital camera, camera are connected with computer, have the mobile phone of camera function, and embedded photographing device etc. can gather the imageing sensor of visible ray can.

Because the wavelength of light source is relatively blue.Blue channel impact shooting being obtained to image is larger.Therefore do not advise doing further image procossing by the information of blue image.

In fluorescence excitation composition, red less, neither the optimal selection of image procossing.

Green channel is optimal selection.In order to obtain good image, suggestion adopts green channel as the Output rusults of imageing sensor.

4th step: the utilization gathering image.

The image collected, may have the inhomogeneities of brightness.May be that laser burns process is uneven, or focus inaccurate, uneven illumination is even, meat ground is uneven etc.Can be revised further by image processing algorithm, and by image binaryzation.Then can deliver to OCR and identify core, or the process and using further such as bar code decoding core.

The binaryzation of image:

Binarization method is a lot, such as adopts NiBlack local binarization method, Canny rim detection, Sobel rim detection etc.Also can pass through high-pass filtering, luminance proportion is carried out to image, then adopt the Binarization methods of the overall situation, as OTSU, Kittler etc.

OCR identifies and bar code decoding core is prior art, and a lot of company all provides corresponding service, is not repeated herein.

The image that shooting obtains and recognition result can be transferred to server by connected modes such as wire transmission, Wifi wireless network, bluetooth or wireless 2G, 3G, 4G networks.And then realize whole application, and even whole pork traceability system.

Claims (7)

1. a harvester for pork Laser Jet, it is characterized in that using ultraviolet source as light source, or the light source comprising ultraviolet light composition is as light source, is excited the fluorescence reaction of calcination part pork by the illumination of this light source; Use visible light image sensor, the fluorescence that acquisition excites is at the image of visible wavelength range.

2. harvester according to claim 1, is characterized in that, uses the spectrum peak wavelength of the light source of fluorescence excitation between 390-400nm, or mainly comprises the light of 390-400nm wavelength.

3. harvester according to claim 1, is characterized in that, increases the light shield for shielding visible ray, to shield the interference of visible ray.

4. harvester according to claim 1, is characterized in that, uses the wavelength main peak scope of fluorescence excitation between 390-400nm; And the light shield increased for shielding visible ray, to shield the interference of visible ray.

5. harvester according to claim 4, is characterized in that, image capture device adopts the mobile phone with camera function.

6. harvester according to claim 5, is characterized in that, increases power supply lithium battery and corresponding circuit, and equipment is made handheld device.

7. harvester according to claim 6, this handheld device can be communicated with server end by mobile phone Wifi, 2G, 3G, 4G network.