CN101912899A - Bar counting method and device - Google Patents
Bar counting method and device Download PDFInfo
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- CN101912899A CN101912899A CN 201010212348 CN201010212348A CN101912899A CN 101912899 A CN101912899 A CN 101912899A CN 201010212348 CN201010212348 CN 201010212348 CN 201010212348 A CN201010212348 A CN 201010212348A CN 101912899 A CN101912899 A CN 101912899A
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Abstract
The invention provides bar counting method and device, wherein the method comprises the following steps of obtaining quantity of bar end faces in a current frame image, and marking the bar end faces in the current frame image; obtaining moving speed of bars on a transmission chain; obtaining a position in the next frame image of the last bar end face in the current frame image according to the moving speed of the bars; obtaining the quantity of bar end faces not marked in the next frame image according to the position in the next frame image of the last bar end face in the current frame image; accumulating the quantity of the bars and marking unmarked bar end faces according to the quantity of the bar end faces in the current frame image and the quantity of the unmarked bar end faces in the next frame image; and marking bar end faces reaching preset values in the frame images with a parting line when the accumulated quantity of bars reaches the preset value so as to show that the quantity of bars before the parting line reaches the preset value. By the invention, bars can be accurately counted.
Description
Technical field
The present invention relates to the computer picture recognition field, particularly, relate to a kind of bar counting method and device.
Background technology
The bar product is when consigning to the user, current standard by the current world, require number in accordance with regulations to carry out the standardization bailing, promptly, deliver goods with Theoretical Mass, this also is the joint demand of producer and End-Customer, and this just requires bar production producer must realize accurate counting, to reduce trade dispute.Because the bar production field condition is abominable, the overlapping and intersection of meeting between bar, and can have many uncertainties in the branch steel process, therefore, realize that the difficulty of bar product accurate counting is bigger.
At present, China steel mill mainly adopts artificial counting and Photoelectric Detection dual mode aspect bar counting, and wherein, most enterprises adopt the artificial counting mode.Artificial counting mode labour intensity height, efficient are low, for avoiding makeing mistakes, take many people repeat count method to guarantee accuracy rate at management aspect, human cost is higher, this counting mode does not match with the full tandem rolling system of bar yet, becomes the speed bottle-neck in the bar factory automated production process.The Photoelectric Detection counting mode can produce many meter phenomenons because oxidated iron sheet dust and the influence of light at random, perhaps adhesion occurs and phenomenon when overlapping when bar, can produce and Lou count phenomenon.For solving the meter problem of leaking, can before counting operation, production line increase machinery tiling device, the individual layer of realization bar tiles and is separated from each other, but above-mentioned measure only can solve the photoelectric counting problem of thick bar, and is powerless with intersection for solving the overlapping of pencil rod.
In recent years, for solving the weak point of two kinds of methods of artificial counting and Photoelectric Detection counting, domestic existing iron and steel enterprise began to adopt the image method counting.The image method counting is to utilize computer that the bar section image that collects is handled, and judges by certain algorithm, thereby draws bar quantity.This method can effectively solve for the insurmountable pencil rod of photoelectric method overlapping, intersect and can't separation case under enumeration problem.But there is the relatively poor and slower problem of counting algorithm of figure identification accuracy in present image method.
Summary of the invention
The main purpose of the embodiment of the invention is to provide a kind of bar counting method and device, has the relatively poor and slower problem of counting algorithm of figure identification accuracy to solve bar counting method of the prior art.
To achieve these goals, the embodiment of the invention provides a kind of bar counting method, and this method comprises: obtain the quantity of bar section in the current frame image, and the bar section in the described current frame image is carried out mark; Obtain the translational speed that is positioned at the bar on the chain; According to the translational speed of described bar, obtain last root bar section position in the next frame image in the described current frame image; According to the position of last root bar section in described next frame image in the described current frame image, obtain the quantity of unmarked bar section in the described next frame image; According to the quantity of unmarked bar section in the quantity of bar section in the described current frame image and the described next frame image, the quantity that adds up described bar successively, and described unmarked bar section carried out mark; When the bar quantity of accumulative total reached predetermined value, the bar section place that reaches described predetermined value in two field picture made the cut-off rule mark, had reached predetermined value with the bar quantity before the expression cut-off rule.
Before the quantity of bar section, said method also comprises in obtaining current frame image: the described bar section that is positioned on the chain is carried out light illumination, to increase the reflected intensity of described bar section.
Before the quantity of bar section, said method also comprises in obtaining current frame image: described current frame image is carried out filtering processing, binary conversion treatment, corrosion treatment and connected domain handle.
After described bar was made the cut-off rule mark, said method also comprised: send chain to cease and desist order, and after carrying out the action of branch steel, send the chain work order.
The embodiment of the invention also provides a kind of bar counting device, and described device comprises: image unit is used to take the bar section that is positioned on the chain; Display unit is used to the two field picture that comprises described bar section that shows that described image unit is taken; Current bar counting unit is used for obtaining the quantity of the current frame image bar section that described display unit shows, and the bar section in the described current frame image is carried out mark; The speed acquiring unit is used to obtain the translational speed that is positioned at the bar on the chain; Bar position acquiring unit is used for the translational speed according to described bar, obtains last root bar section position in the next frame image in the described current frame image; Unmarked bar acquiring unit is used for last root bar section position in the next frame image according to described current frame image, obtains the quantity of unmarked bar section in the described next frame image; Next bar counting unit, be used for quantity according to unmarked bar section in the quantity of described current frame image bar section and the described next frame image, add up the quantity of described bar successively, and described unmarked bar section is carried out mark; The cut-off rule indexing unit is used for when the quantity of described accumulative total reaches predetermined value, and the bar section place that reaches described predetermined value in display unit makes the cut-off rule mark, has reached predetermined value with the bar quantity before the expression cut-off rule.
Preferably, above-mentioned device also comprises one of following:
Lighting source is used for the bar section that is positioned on the described chain is carried out light illumination, to increase the reflected intensity of described bar section;
Graphics processing unit is used for that each two field picture that described display unit shows is carried out filtering processing, binary conversion treatment, corrosion treatment and connected domain and handles;
Chain control command transmitting element is used for sending chain and ceases and desist order, and after carrying out the action of branch steel, sends the chain work order when described cut-off rule indexing unit is made the cut-off rule mark.
By means of technique scheme one of at least, by knowing last root bar section position in the next frame image in the current frame image, can accurately obtain the quantity of the bar section in current and the next frame image, and then obtain bar quantity, than image method of the prior art, the present invention more can carry out bar counting accurately and rapidly.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structured flowchart according to the bar counting device of the embodiment of the invention;
Fig. 2 is the detailed block diagram according to the bar counting device of the embodiment of the invention;
Fig. 3 is the counting schematic diagram according to the bar counting device of the embodiment of the invention;
Fig. 4 is the bar counting schematic representation of apparatus according to the embodiment of the invention;
Fig. 5 is the flow chart according to the bar counting method of the embodiment of the invention;
Fig. 6 is another flow chart according to the bar counting method of the embodiment of the invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The embodiment of the invention provides a kind of bar counting method and device.The present invention is described in detail below in conjunction with accompanying drawing.
The embodiment of the invention provides a kind of bar counting device, and as shown in Figure 1, this device comprises:
Current bar counting unit 103 is used for obtaining the quantity of the current frame image bar section that display unit 102 shows, and the bar section in the current frame image is carried out mark;
Bar position acquiring unit 105 is used for the translational speed according to bar, obtains last root bar section position in the next frame image in the current frame image;
Unmarked bar acquiring unit 106 is used for last root bar section position in the next frame image according to above-mentioned current frame image, obtains the quantity of unmarked bar section in the next frame image;
Next bar counting unit 107 is used for the quantity according to unmarked bar section in the quantity of above-mentioned current frame image bar section and the next frame image, adds up the quantity of bar successively, and unmarked bar section is carried out mark;
Cut-off rule indexing unit 108 is used for when the quantity of accumulative total reaches predetermined value, and the bar section place that reaches predetermined value in display unit makes the cut-off rule mark, has reached predetermined value with the bar quantity before the expression cut-off rule.
By above description as can be seen, by current bar counting unit, unmarked bar acquiring unit and next bar counting unit, can add up the quantity of bar simply and easily, than image method of the prior art, present embodiment more can carry out bar counting accurately and rapidly.
Preferably, as shown in Figure 2, the bar counting device also comprises:
Lighting source 109 is used for the bar section that is positioned on the chain is carried out light illumination, to increase the reflected intensity of bar section; Like this, can be conveniently to the identification of bar section;
Graphics processing unit 110 is used for each two field picture that display unit shows is carried out processing such as cutting, filtering, binaryzation, hole filling, the processing of burn into connected domain, numbering;
Chain control command transmitting element 111 is used for sending chain and ceases and desist order, and after carrying out the action of branch steel, sends the chain work order when the cut-off rule indexing unit is made the cut-off rule mark.
Describe the workflow of bar counting device in detail below in conjunction with said units, for convenience, below current frame image is called first two field picture, the next frame image is called second two field picture.
At first, bar is placed on the chain, open image unit 101, display unit 102, lighting source 109, graphics processing unit 110 by observing the bar section that shows in the display unit 102, is regulated the brightness of lighting source 109.Afterwards, chain control command transmitting element 111 sends the chain work order, image unit 101 is taken the bar section that is positioned on the chain, and by display unit 102 demonstrations, current bar counting unit 103 obtains the bar section in first two field picture that display unit 102 shows, undertaken after image handles by 110 pairs first two field pictures of graphics processing unit, count the bar section in first two field picture and each bar section carried out mark; Simultaneously, speed acquiring unit 104 obtains the translational speed of bar, so that bar position acquiring unit 105 can be known last root bar section position in second two field picture in first two field picture, unmarked then bar acquiring unit 106 is informed in unlabelled bar section in second two field picture, these unlabelled bar sections are the bar section that newly photographs of image unit 101 just, next bar counting unit 107 adds up on the basis of current bar counting unit 103 countings these unlabelled bar sections, for example, the bar section of current bar counting unit 103 countings is 5, the unmarked bar section that unmarked bar acquiring unit 106 is known is 3, then the bar section quantity of next bar counting unit 107 counting just is 8, that is to say that the bar quantity of taking through image unit 101 is 8.Then, bar position acquiring unit 105 obtains last root bar section position in the 3rd two field picture in second two field picture, unmarked bar acquiring unit 106 is informed in unmarked bar section in the 3rd two field picture, call next bar counting unit 107, according to the bar section quantity of next bar counting unit 107 in second two field picture time accumulative total, and unmarked bar section in the 3rd two field picture known of unmarked bar acquiring unit 106, add up bar section quantity, if unmarked bar section is 4 in the 3rd two field picture that this moment, unmarked bar acquiring unit 106 was known, then the bar section quantity this moment counted of next bar counting unit 107 just is 12, simultaneously, next bar counting unit 107 carries out mark to these four bar sections.
Particularly, as shown in Figure 3, show bar section in the display unit, bar section is positioned on the chain, in first two field picture, 4 bar section (end faces 1 have been shown, end face 2, end face 3, end face 4), bar section in current bar counting unit 103 countings, first two field picture is 4, and each bar section carried out mark (representing to count with diagonal line hatches), in second two field picture, shown the end face 3 in first two field picture, end face 4, and the end face 5 that newly advances, 6,7,8, bar position acquiring unit 105 has obtained the position of end face 4 in second two field picture, the unmarked bar section that unmarked bar acquiring unit 106 is known is an end face 5,6,7,8, next bar counting unit 107 accumulative total bar section quantity is 8, simultaneously, next bar counting unit 107 carries out the mark (not shown) to these four bar sections.
Repeat bar position acquiring unit 105, unmarked bar acquiring unit 106 and next bar counting unit 107, bar section quantity up to next bar counting unit 107 accumulative total reaches predetermined value, the bar section place that reaches predetermined value in 108 pairs of display units of cut-off rule indexing unit makes the cut-off rule mark, has reached predetermined value with the bar quantity before the expression cut-off rule.The predetermined value here can be to set in advance in system according to user's request, for example, predetermined value is 100, then the bar section quantity of next bar counting unit 107 accumulative total is 100 o'clock, cut-off rule indexing unit 108 is made the cut-off rule mark at the 100th bar section place, before the cut-off rule is 100 bars so that the user is informed in, and handled easily person carries out the operation of branch steel.Afterwards, call current bar counting unit 103 again, and carry out above-mentioned flow process, make the cut-off rule mark once more up to cut-off rule indexing unit 108.
Fig. 4 is the detailed diagram according to the bar counting device of the embodiment of the invention, as shown in Figure 3, light source 1 is 1.5m-2m with the horizontal range of bar 2 ends, be positioned at below chain bed 3 horizontal planes, and form 5～10 angles of spending in the bar end with this plane, can reduce the brightness of bar 2 upper surfaces like this.Lighting source adopts the blue led light source made from super bright blue optically focused diode, because the bar on the production line is after the last process cold shears cuts, its end face often presents blueness, therefore, adopts blue-light source can increase bar section light reflected intensity.Filming apparatus 4 adopts the black and white DV, adopts the black and white mode can increase the difference of destination object and background, improves the target image definition.Camera sensor in the filming apparatus 4 adopts the CCD that lines by line scan, and the data-interface that connects computer adopts USB2.0 or IEEE1394a, and frame per second is 30fps.Filming apparatus 4 is 1.5m-2m with the horizontal range of bar 2 ends, is positioned at chain bed 3 above water, and forms 5～10 angles of spending in the bar end with this plane.Taking the visual field width is 300mm-700mm, highly is 200mm.Chain bed 3 upper and lowers are respectively installed shade, and the top is a shading case 5, can cover the bar end, blocks bias light, and the below is height-adjustable shadow shield 6, with the bar end on same vertical plane, block the bottom reverberation.Encoder 8 is installed on chain bed power transmission shaft 7, and the pulse signal input of its output places the numbered card 10 of industrial computer 9, is used to record the translational speed of chain bed, and then obtains the displacement of identical bar in two width of cloth pictures of front and back.
Workflow based on schematic diagram shown in Figure 4 is:
In the interface of computer touch-screen 11, regulate the brightness of light source 1, make bar only in the highlighted demonstration of end face, the bundling quantitative value that configures requirement (promptly, above-mentioned predetermined value), press start button, chain bed 3 starts, filming apparatus 4 begins the end face of bar 2 is taken continuously, and on touch-screen 11, show in real time current scene, the digital picture that shooting obtains is input in the industrial computer 9, and software carries out cutting to the picture of input, smothing filtering, binaryzation, filling pore, corrosion, connected domain is handled, numbering, the home position centre coordinate, operations such as counting obtain the bar radical.Industrial computer 9 utilizes encoder 8 and numbered card 10, the displacement of same bar in the two frame pictures before and after calculating, again with preceding width of cloth picture in the row coordinate figure of last root bar do computing, the row coordinate position of last root bar in the back panel picture in the width of cloth picture before obtaining, the bar that exists on this row coordinate position and the bar moving direction rightabout is increased the accumulative total value by root, and should value and bundling require numerical value to compare, if it is unequal, only the coordinate position with this bar is that a round dot is drawn at the center, as count flag; If equate, then draw a vertical line (that is cut-off rule) in this back, bar position, point out branch steel position, be presented on the interface of touch-screen 11, send the order that stops the chain bed to I/O control panel 12 simultaneously, make 13 stalls of chain bed drive motors, chain bed 3 stops, and carries out operations such as branch steel again.The above-mentioned steps execution that moves in circles.
By above description as can be seen, by the row coordinate position of last root bar in the back panel picture in the width of cloth picture before only considering, again the bar that exists on this row coordinate position and the bar moving direction rightabout is counted, can reduce operand, and, adopt the present invention can avoid influence factors such as bar area, be applicable to that the bar of all specifications is used.
The embodiment of the invention provides a kind of bar counting method, and as shown in Figure 5, this method comprises:
Step 501 is obtained the quantity of bar section in the current frame image, and the bar section in the current frame image is carried out mark;
Step 502 is obtained the translational speed that is positioned at the bar on the chain;
Step 504 according to last root bar section position in the next frame image in the current frame image, is obtained the quantity of unmarked bar section in the next frame image;
Step 505 according to the quantity of unmarked bar section in the quantity of bar section in the current frame image and the next frame image, adds up the quantity of bar successively, and described unmarked bar section is carried out mark;
Above-mentioned two field picture is taken by image unit and is shown by display unit.
By above description as can be seen, by knowing last root bar section position in the next frame image in the current frame image, can accurately obtain the quantity of the bar section in current and the next frame image, and then obtain bar quantity, than image method of the prior art, bar counting method accuracy, rapidity that present embodiment provides are higher.
Before execution in step 501, also need the bar section that is positioned on the chain is carried out light illumination, to increase the reflected intensity of bar section.Like this, the bar section that can conveniently show display unit is counted.
Preferably, after the bar section that obtains the display unit demonstration, also need current frame image carried out processing such as cutting, filtering, binaryzation, hole filling, the processing of burn into connected domain, numbering, making things convenient for image recognition, and then convenient bar section is counted.In specific implementation process, image processing process comprises: carry out smothing filtering, setting threshold gray level image is converted into binary image, fills hole in the binary image, image is carried out the burn into connected domain handles, calculates the connected domain number for removing adhesion for removing noise, connected domain is numbered and the home position centre coordinate, because the corresponding bar of each connected domain, above-mentioned gained connected domain number is the bar radical.Preferably, can all carry out image to each two field picture and handle, to make things convenient for image recognition.
After step 506 pair bar is made the cut-off rule mark, send chain and cease and desist order, carry out the operation of branch steel with the handled easily personnel, after carrying out the action of branch steel, send the chain work order, repeat above-mentioned steps 501-506 successively.
Below based on schematic diagram shown in Figure 4, describe bar counting method in detail, as shown in Figure 6:
Step 602, the row coordinate of last root bar section before preserving in the width of cloth picture;
Step 604, the position and the displacement difference of last root bar in the preceding width of cloth picture of utilization, the row coordinate position of last root bar in the back panel picture in the width of cloth picture before can obtaining;
Step 605 is counted the bar that exists on above-mentioned row coordinate position and the bar moving direction rightabout, obtains the bar number that increases newly with respect to preceding width of cloth picture in the back panel picture, to its accumulated counts, obtains by photo current bar radical sum;
Above-mentioned steps is carried out in circulation, can get the summation of bar radical to the end.
According to the bundling quantitative requirement, for the bar position corresponding to this quantity in the bar picture identifies branch steel position, take following method: after obtaining the coordinate position of every bar in the photo current, according to the rightabout of bar moving direction, increase the bar accumulated quantity by root, and should value and bundling require numerical value to compare, if equate, then make cut-off rule, to point out branch steel position in this bar position, and be to mark in the center with the coordinate position of this bar, as count flag; Otherwise only the coordinate position with this bar is to mark in the center, as count flag.
In sum, the present invention is according to the motion bar section image that absorbs continuously on the production line, adopt machine vision technique, can accurately identify the radical of bar in the single image, and based on the bar that increases newly with respect to preceding width of cloth picture in the subsequent pictures, carry out accumulated counts, then according to the bundling quantitative requirement, suitable station location marker goes out to satisfy the branch steel position of production requirement in corresponding bar picture.By the present invention, can effectively solve pencil rod overlapping, intersect and can't separation case under enumeration problem, the algorithm of employing is with respect to previous methods simple and fast more, computing time is short, satisfies online real-time requirement.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method can instruct relevant hardware to finish by program, this program can be stored in the computer read/write memory medium, such as ROM/RAM, magnetic disc, CD etc.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a bar counting method is characterized in that, described method comprises:
Obtain the quantity of bar section in the current frame image, and the bar section in the described current frame image is carried out mark;
Obtain the translational speed that is positioned at the bar on the chain;
According to the translational speed of described bar, obtain last root bar section position in the next frame image in the described current frame image;
According to the position of last root bar section in described next frame image in the described current frame image, obtain the quantity of unmarked bar section in the described next frame image;
According to the quantity of unmarked bar section in the quantity of bar section in the described current frame image and the described next frame image, the quantity that adds up described bar successively, and described unmarked bar section carried out mark;
When the bar quantity of accumulative total reached predetermined value, the bar section place that reaches described predetermined value in two field picture made the cut-off rule mark, had reached predetermined value with the bar quantity before the expression cut-off rule.
2. method according to claim 1 is characterized in that, before the described quantity of obtaining bar section in the current frame image, described method also comprises:
The described bar section that is positioned on the chain is carried out light illumination, to increase the reflected intensity of described bar section.
3. method according to claim 1 is characterized in that, before the described quantity of obtaining bar section in the current frame image, described method also comprises:
Described current frame image is carried out filtering processing, binary conversion treatment, corrosion treatment and connected domain to be handled.
4. method according to claim 1 is characterized in that, described bar is done after the cut-off rule mark, and described method also comprises:
The transmission chain is ceased and desisted order, and after carrying out the action of branch steel, sends the chain work order.
5. a bar counting device is characterized in that, described device comprises:
Image unit is used to take the bar section that is positioned on the chain;
Display unit is used to the two field picture that comprises described bar section that shows that described image unit is taken;
Current bar counting unit is used for obtaining the quantity of the current frame image bar section that described display unit shows, and the bar section in the described current frame image is carried out mark;
The speed acquiring unit is used to obtain the translational speed that is positioned at the bar on the chain;
Bar position acquiring unit is used for the translational speed according to described bar, obtains last root bar section position in the next frame image in the described current frame image;
Unmarked bar acquiring unit is used for last root bar section position in the next frame image according to described current frame image, obtains the quantity of unmarked bar section in the described next frame image;
Next bar counting unit, be used for quantity according to unmarked bar section in the quantity of described current frame image bar section and the described next frame image, add up the quantity of described bar successively, and described unmarked bar section is carried out mark;
The cut-off rule indexing unit is used for when the quantity of described accumulative total reaches predetermined value, and the bar section place that reaches described predetermined value in display unit makes the cut-off rule mark, has reached predetermined value with the bar quantity before the expression cut-off rule.
6. device according to claim 5 is characterized in that, described device also comprises:
Lighting source is used for the bar section that is positioned on the described chain is carried out light illumination, to increase the reflected intensity of described bar section.
7. device according to claim 5 is characterized in that, described device also comprises:
Graphics processing unit is used for that each two field picture that described display unit shows is carried out filtering processing, binary conversion treatment, corrosion treatment and connected domain and handles.
8. device according to claim 5 is characterized in that, described device also comprises:
Chain control command transmitting element is used for sending chain and ceases and desist order, and after carrying out the action of branch steel, sends the chain work order when described cut-off rule indexing unit is made the cut-off rule mark.
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| CN107430702B (en) * | 2015-03-10 | 2021-03-12 | 首要金属科技德国有限责任公司 | Counting rod-shaped products based on the acquired images |
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