CN103344563B - A kind of self-adaptation toning light modulation machine vision light source pick-up unit and method - Google Patents
A kind of self-adaptation toning light modulation machine vision light source pick-up unit and method Download PDFInfo
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Abstract
The present invention relates to a kind of self-adaptation toning light modulation machine vision light source pick-up unit and method.This device comprises toning dimmed light sources, industrial camera, industrial computer, toning light modulation flash light Source drive and detects workpiece.This method is: industrial camera is by the exposure of toning light modulation flash light source driver drives toning dimmed light sources, thus picked-up detects the image of workpiece, then sends view data to industrial computer; Industrial computer by under artificial parameters prerequisite, changes color and the illumination of toning dimmed light sources when initial according to set state modulator toning light modulation flash light Source drive.Present invention achieves Automatic adjusument light source colour and illumination, particularly to the adjustment of light source luminescent color, better effect can be provided for the application utilizing machine vision acquires image to carry out detecting, accurately screen flaw for whole detection system and provide safeguard.
Description
Technical field
The present invention relates to a kind of self-adaptation toning light modulation machine vision light source pick-up unit and method, especially a kind of alternating flashing light light source detection device and self-adapting intelligent detection method.
Technical background
One of Machine Vision Inspecting System key selects correctly suitable flash illumination, and the effect of light source obtains the image with distinct contrast detecting the tested feature of workpiece, the therefore quality of the direct effect diagram picture of machine vision light source, and then have influence on the Detection results of system.Traditional machine vision light source adopts monochromatic or white light source, and can only regulate the illumination of light source, can not regulate the color of light source, this is a great limitation to machine vision applications.There is certain defect in current existing method: only has monochromatic light, white light or the detection method such as ruddiness, green glow, and workpiece color printing and monochromatic light Incomplete matching, flaw or feature are not obvious on gray-scale map, there is aberration problem in the printing of different workpieces different batches, even if same batch also exists color depth variation issue.
At present, for the control method of light source, invention 200910083235.0 discloses eliminates the reflective machine-vision lighting system of body surface by polarizing method; Invention 201110251472.0 discloses a kind of method manually being arranged light source board LED illuminating state by serial ports; Invention 201110252865.3 discloses a kind of method that machine vision light source brightness adjusts in real time; Invention 201110318196.5 discloses the headlamp handover control system of a kind of automobile by camera; Invention 200410043753.7 discloses a kind of illuminating light source device for the automatic adjust intensity in machine vision measuring system; Invention 200810050700.6 discloses Vision Builder for Automated Inspection adaptive acquiring method of lightness stabilized image in change photoenvironment.In published invention or document, do not mention and use colored toning light modulation flash system to realize the example of machine vision self-adapting intelligent control method.
Summary of the invention
The object of the invention is to the defect existed for prior art, a kind of self-adaptation toning light modulation machine vision light source pick-up unit and method are provided, can provide and regulate light source colour and illumination in real time, particularly to the adjustment of light source luminescent color, new a kind of effect can be provided for the application utilizing machine vision acquires workpiece image to carry out detecting, accurately screen flaw for whole detection system and provide safeguard.
For achieving the above object, design of the present invention is:
A kind of self-adaptation toning light modulation machine vision light source pick-up unit, it comprises industrial camera, toning dimmed light sources, detects workpiece, industrial computer, toning light modulation flash light Source drive.Described industrial camera by the exposure of toning light modulation flash light source driver control toning dimmed light sources, thus can absorb the image detecting workpiece, then view data is sent to described industrial computer and processes; Described industrial computer when initial by under artificial parameters prerequisite, according to light modulation flash light Source drive of mixing colours described in set state modulator; Described toning light modulation flash light Source drive can change color and the illumination of toning dimmed light sources according to the requirement of described industrial computer.Originally be used for the workpiece with colored printing or article Defect Detection, feature identification etc., anomalad and color defect etc. can be screened.
Above-mentioned toning light modulation flash light source driver drives RGB dimmed light sources sends white light, described industrial camera picked-up colored images' transmission is to described industrial computer, described industrial computer carries out gradation conversion and gray level image process and detection to coloured image, user can operate described industrial computer, choose the characteristic area of the image after described industrial computer process, go forward side by side row mode selective enhancement or filtering.
Above-mentioned industrial computer carries out toning light modulation pre-service to the coloured image that industrial camera absorbs, and by gained result in conjunction with above-mentioned user-selected enhancement mode or filtering pattern, carries out toning and calculates, then carry out light modulation calculating according to light modulation algorithm according to toning algorithms.Described industrial computer calculated results controls described toning light modulation flash light Source drive, and then control RGB dimmed light sources, regulates color and the illumination of flashlamp luminescence.
According to foregoing invention design, the present invention adopts following technical proposals:
A kind of self-adaptation toning light modulation machine vision light source pick-up unit, comprise industrial camera, toning dimmed light sources, detect workpiece, industrial computer and toning light modulation flash light Source drive, it is characterized in that: described industrial computer connects toning dimmed light sources through toning light modulation flash light Source drive; Described toning dimmed light sources irradiating and detecting workpiece, industrial camera is aimed at and is detected workpiece, and the output of industrial camera is attached to industrial computer.
A kind of self-adaptation toning light modulation machine vision light source detection method, self-adaptation according to claim 1 toning light modulation machine vision light source pick-up unit is adopted to detect, it is characterized in that: industrial camera 1.1 can detect the image of workpiece by toning light modulation flash light source driver drives toning dimmed light sources exposure picked-up, view data sends industrial computer to; Industrial computer under artificial parameters prerequisite, according to set state modulator toning light modulation flash light Source drive; Toning light modulation flash light Source drive is according to the color of the control break toning dimmed light sources of industrial computer and illumination.
The concrete operation step of said method is as follows:
(1) initial white photo-beat is taken the photograph before self-adaptation toning light modulation machine vision light source detection system is arranged without user, sends white light by toning light modulation flash light source driver drives toning dimmed light sources;
(2) industrial camera is taken pictures and is absorbed the image of detection workpiece, and coloured image exports and passes to industrial computer;
(3) industrial computer carries out gradation conversion to the coloured image detecting workpiece, and carries out gray level image process, carries out filtering and contrast brightness regulation to image;
(4) user according on the interface of industrial computer through image that step (3) provides, the surveyed area be concerned about user by artificial selected characteristic region and normal background area are chosen, then to be strengthened by model selection or filtering carries out pattern setting to surveyed area, wherein enhancement mode is used in background area, giving prominence to surveyed area to carry out flaw or feature identification, and filtering pattern is used in background area, hiding surveyed area to prevent flaw from judging by accident;
(5) characteristic area of the image that provides according to step (3) of industrial computer and step (4) is chosen and pattern is arranged, and carries out toning light modulation pre-service, and determining to mix colours with this calculates and limit value in light modulation computation process and adjustment threshold value;
(6) industrial computer carries out toning calculating according to the result of step (5), and the enhancement mode wherein arranged in step (4) namely strengthens surveyed area, is taken out the rgb value of surveyed area as toning output valve by industrial computer; The filtering pattern wherein arranged in step (4) and filtering surveyed area, taken out the rgb value of background area as toning output valve by industrial computer;
(7) industrial computer carries out light modulation calculating after toning calculates, light modulation calculates carries out gradation conversion by the toning output valve of step (6), then the limit value provided with step (5) and regulates threshold value to compare, by toning output valve and then generate light modulation output RGB setting value; Brightness of image calculating is carried out to the gray level image of gradation conversion simultaneously, export with light modulation the gray scale that RGB setting value changes and compare, thus increase or reduce light modulation and export rgb value;
(8) light modulation of mixing colours drives the light modulation generated according to step (7) to export rgb value, different colours flashlamp lamp group on control RGB dimmed light sources, send flash illumination through light modulation of mixing colours on detection workpiece, thus take pictures for industrial camera flash illumination is provided;
(9) industrial camera is taken pictures shot detection workpiece again, is exported and passes to industrial computer and carry out gradation conversion and gray level image process, carry out filtering and contrast brightness regulation to image by coloured image; Then on the one hand treated gray level image is sent to computer recognizing and Machine Vision Detection is carried out in detection, on the other hand by toning light modulation pre-service, and then toning calculates and light modulation calculates RGB dimmed light sources, the flash illumination formed next time exports, this process constantly circulates and carries out, form the self-adaptation toning light modulation to machine vision light source, accurately to reach the demand of user.
The present invention compared with prior art, has following outstanding advantages:
Compared with conventional machines vision light source, this self-adaptation toning light modulation machine vision light source detection method adopts toning dimmed light sources on the one hand, by the regulating action of toning light modulation flash light Source drive, toning dimmed light sources can be made to send the light of required color and required illumination, make applied for machines vision screen flaw more accurate; This self-adaptation toning light modulation machine vision light source detection method on the other hand, once user's selected characteristic region after preference pattern, self-adaptation can be carried out to the glow color of light source and illumination automatically to regulate, reach user detect demand until light source sends the color of light and illumination, particularly when occurring in working that detection workpiece or external environment condition have deviation, can adjust according to toning algorithms and light modulation algorithm, revise flashing color and the illumination of flash light source.
Accompanying drawing explanation
Fig. 1 is the overall construction drawing of a kind of self-adaptation toning of the present invention light modulation machine vision light source control method.
Fig. 2 is the process flow diagram of self-adaptation toning light modulation machine vision light source control method involved in the present invention.
Fig. 3 is the circuit theory schematic diagram of toning light modulation flash light Source drive involved in the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, embodiments of the invention are described in further detail.
Case study on implementation one:
As shown in Figure 1, this self-adaptation toning light modulation machine vision light source pick-up unit, comprises industrial camera (1.1), toning dimmed light sources (1.2), detection workpiece (1.3), industrial computer (1.4) and toning light modulation flash light Source drive (1.5).It is characterized in that: industrial computer (1.4) connects toning dimmed light sources (1.2) through toning light modulation flash light Source drive (1.5), toning dimmed light sources (1.2) irradiating and detecting workpiece (1.3), industrial camera (1.1) is aimed at and is detected workpiece (1.3), and the output of industrial camera (1.1) is attached to industrial computer (1.4).Industrial camera (1.1) can drive toning dimmed light sources (1.2) exposure picked-up to detect the image of workpiece (1.3) by toning light modulation flash light Source drive (1.5), and view data sends industrial computer (1.4) to; Industrial computer (1.4) under artificial parameters prerequisite, according to set state modulator toning light modulation flash light Source drive (1.5); Toning light modulation flash light Source drive (1.5) is according to the color of control break toning dimmed light sources (1.2) of industrial computer (1.4) and illumination.
Toning dimmed light sources (1.2) as shown in Figure 1 can change color and illumination, provides direct projection or the device of the photograph that diffuses, and the toning dimmed light sources (1.2) of conventional employing LED is by red, green, blue three-color LED light pearl array and provide direct projection or irreflexive metal construction to form.
Toning light modulation flash light Source drive (1.5) as shown in Figure 1 exports according to the control of industrial computer (1.4), for the device that toning dimmed light sources (1.2) provides different driving electric current and On/Off to control, its circuit theory schematic diagram as shown in Figure 3, comprise microprocessor, power circuit, power driving circuit etc., current adjustment parameters that industrial computer (1.4) sent by serial ports and the On/Off signal that digital circuit sends can be received, then driven the different LED lamp pearl array of toning dimmed light sources (1.2) by power driving circuit.
Case study on implementation two:
As shown in Figure 2, this self-adaptation toning light modulation machine vision light source detection method, said apparatus is adopted to detect, user can according to real needs, for image selected characteristic region, and different patterns (as strengthened or filtering) is set, thus realize the luminous color of adaptive adjustment described RGB dimmed light sources and illumination, specific implementation step is as follows:
(1) before the self-adaptation toning light modulation machine vision light source detection system shown in Fig. 1 is arranged without user, initial white photo-beat is taken the photograph and is driven toning dimmed light sources (1.2) to send white light by toning light modulation flash light Source drive (1.5);
(2) industrial camera is taken pictures and is absorbed the image of detection workpiece (1.3), exports pass to industrial computer (1.4) through coloured image;
(3) industrial computer (1.4) carries out gradation conversion to the coloured image detecting workpiece (1.3), and carries out gray level image process, carries out filtering and contrast brightness regulation to image;
(4) user according on the interface of industrial computer (1.4) through image that step (3) provides, the surveyed area be concerned about user by artificial selected characteristic region and normal background area are chosen, then to be strengthened by model selection or filtering carries out pattern setting to surveyed area, wherein enhancement mode is used in background area, giving prominence to surveyed area to carry out flaw or feature identification, and filtering pattern is used in background area, hiding surveyed area to prevent flaw from judging by accident;
(5) characteristic area of the image that provides according to step (3) of industrial computer (1.4) and step (4) is chosen and pattern is arranged, and carries out toning light modulation pre-service, and determining to mix colours with this calculates and limit value in light modulation computation process and adjustment threshold value etc.;
(6) industrial computer (1.4) carries out toning calculating according to the result of step (5), and the enhancement mode wherein arranged in step (4) namely strengthens surveyed area, is taken out the rgb value of surveyed area as toning output valve by industrial computer (1.4); The filtering pattern wherein arranged in step (4) and filtering surveyed area, taken out the rgb value of background area as toning output valve by industrial computer (1.4);
(7) industrial computer (1.4) carries out light modulation calculating after toning calculates, light modulation calculates carries out gradation conversion by the toning output valve of step (6), then the limit value provided with step (5) and regulates threshold value to compare, by toning output valve and then generate light modulation output RGB setting value; Brightness of image calculating is carried out to the gray level image of gradation conversion simultaneously, export with light modulation the gray scale that RGB setting value changes and compare, thus increase or reduce light modulation and export rgb value;
(8) light modulation of mixing colours drives the light modulation generated according to step (7) to export rgb value, different colours flashlamp lamp group on control RGB dimmed light sources, send flash illumination through light modulation of mixing colours to detecting on workpiece (1.3), thus take pictures for industrial camera flash illumination is provided;
(9) industrial camera is taken pictures again shot detection workpiece (1.3), is exported and passes to industrial computer (1.4) and carry out gradation conversion and gray level image process, carry out filtering and contrast brightness regulation to image by coloured image; Then on the one hand treated gray level image is sent to computer recognizing and Machine Vision Detection is carried out in detection, on the other hand by toning light modulation pre-service (1.12), and then toning calculates and light modulation calculates RGB dimmed light sources, the flash illumination formed next time exports, this process constantly circulates and carries out, form the self-adaptation toning light modulation to machine vision light source, accurately to reach the demand of user.
Claims (1)
1.
a kind ofthe detection method of self-adaptation toning light modulation machine vision light source, the self-adaptation toning light modulation machine vision light source pick-up unit adopted comprises industrial camera (1.1), toning dimmed light sources (1.2), detection workpiece (1.3), industrial computer (1.4) and toning light modulation flash light Source drive (1.5), and described industrial computer (1.4) connects toning dimmed light sources (1.2) through toning light modulation flash light Source drive (1.5); Described toning dimmed light sources (1.2) irradiating and detecting workpiece (1.3), industrial camera (1.1) is aimed at and is detected workpiece (1.3), the output of industrial camera (1.1) is attached to industrial computer (1.4), industrial camera (1.1) can drive toning dimmed light sources (1.2) exposure picked-up to detect the image of workpiece (1.3) by toning light modulation flash light Source drive (1.5), and view data sends industrial computer (1.4) to; Industrial computer (1.4) under artificial parameters prerequisite, according to set state modulator toning light modulation flash light Source drive (1.5); Toning light modulation flash light Source drive (1.5) is according to the color of control break toning dimmed light sources (1.2) of industrial computer (1.4) and illumination; It is characterized in that the concrete operation step of the method is as follows:
(1) initial white photo-beat is taken the photograph before self-adaptation toning light modulation machine vision light source detection system is arranged without user, drives toning dimmed light sources (1.2) to send white light by toning light modulation flash light Source drive (1.5);
(2) industrial camera (1.1) is taken pictures and is absorbed the image of detection workpiece (1.3), and coloured image exports and passes to industrial computer (1.4);
(3) industrial computer (1.4) carries out gradation conversion to the coloured image detecting workpiece (1.3), and carries out gray level image process, carries out filtering and contrast brightness regulation to image;
(4) user according on the interface of industrial computer (1.4) through image that step (3) provides, the surveyed area be concerned about user by artificial selected characteristic region and normal background area are chosen, then to be strengthened by model selection or filtering carries out pattern setting to surveyed area, wherein enhancement mode is used in background area, giving prominence to surveyed area to carry out flaw or feature identification, and filtering pattern is used in background area, hiding surveyed area to prevent flaw from judging by accident;
(5) characteristic area of the image that provides according to step (3) of industrial computer (1.4) and step (4) is chosen and pattern is arranged, and carries out toning light modulation pre-service, and determining to mix colours with this calculates and limit value in light modulation computation process and adjustment threshold value;
(6) industrial computer (1.4) carries out toning calculating according to the result of step (5), and the enhancement mode wherein arranged in step (4) namely strengthens surveyed area, is taken out the rgb value of surveyed area as toning output valve by industrial computer (1.4); The filtering pattern wherein arranged in step (4) and filtering surveyed area, taken out the rgb value of background area as toning output valve by industrial computer (1.4);
(7) industrial computer (1.4) carries out light modulation calculating after toning calculates, light modulation calculates carries out gradation conversion by the toning output valve of step (6), then the limit value provided with step (5) and regulates threshold value to compare, by toning output valve and then generate light modulation output RGB setting value; Brightness of image calculating is carried out to the gray level image of gradation conversion simultaneously, export with light modulation the gray scale that RGB setting value changes and compare, thus increase or reduce light modulation and export rgb value;
(8) light modulation that light modulation flash light Source drive (1.5) of mixing colours generates according to step (7) exports rgb value, control the different colours flashlamp lamp group in toning dimmed light sources (1.2), send flash illumination through light modulation of mixing colours to detecting on workpiece (1.3), thus take pictures for industrial camera flash illumination is provided;
(9) industrial camera is taken pictures again shot detection workpiece (1.3), is exported and passes to industrial computer (1.4) and carry out gradation conversion and gray level image process, carry out filtering and contrast brightness regulation to image by coloured image; Then on the one hand treated gray level image is sent to computing machine, then carries out computer recognizing and detection, thus realize the Machine Vision Detection of workpiece flaw or feature; On the other hand by toning light modulation pre-service, and then calculate and light modulation calculating through toning, toning dimmed light sources (1.2) is controlled again by toning light modulation flash light Source drive (1.5), the flash illumination formed next time exports, this process constantly circulates and carries out, form the self-adaptation toning light modulation to machine vision light source, accurately to reach the demand of user.
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