CN104528617A - Method for detecting liquid level of bottle body in accordance with filling requirements - Google Patents
Method for detecting liquid level of bottle body in accordance with filling requirements Download PDFInfo
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- CN104528617A CN104528617A CN201410757610.6A CN201410757610A CN104528617A CN 104528617 A CN104528617 A CN 104528617A CN 201410757610 A CN201410757610 A CN 201410757610A CN 104528617 A CN104528617 A CN 104528617A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
- B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
- B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
- B67C3/22—Details
- B67C3/28—Flow-control devices, e.g. using valves
- B67C3/282—Flow-control devices, e.g. using valves related to filling level control
- B67C3/284—Flow-control devices, e.g. using valves related to filling level control using non-liquid contact sensing means
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- Image Analysis (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention belongs to the technical field of digital image treatment, and provides a method for detecting the liquid level of a bottle body in accordance with filling requirements. The method comprises the following steps: (1) collecting an image according with the filled bottle body; (2) selecting a position area; (3) determining the position of a bottle head; (4) determining a reference search area and a reference point; (5) determining a liquid level search area; and (6) judging whether the liquid level accords with the filling requirements or not. According to the method, whether the liquid level of the filled medicine accords with the filling requirements can be rapidly, objectively and accurately detected; and the detection accuracy and efficiency of the medicine quality are improved.
Description
Art
The invention belongs to digital image processing, relate to a kind of method detecting body liquid level.
Background technology
Liquid drug in pouring process, filling deficiency or the excessive direct quality affecting medicine.At present, liquid drug filling after liquid level whether meet filling requirement mainly by artificial visually examine.Although manual detection is convenient, directly perceived, affect greatly by subjective factor, workman works long hours and easily causes visual fatigue, there will be misjudgment, and then affects drug quality.
Summary of the invention
The object of this invention is to provide and a kind ofly can detect whether body liquid level meets the method for inspection of filling requirement rapidly and accurately.This method of inspection can replace manually detecting, and overcomes the interference of subjective factor in manual detection process, can quick, objective, exactly detect filling after medicine liquid level whether meet filling requirement, improve the precision and efficiency of detecting of drug quality.Technical scheme of the present invention is as follows:
Detect the method whether body liquid level meets filling requirement, comprise the following steps:
(1) gather a width comprise filling after the image of body;
(2) regioselective region
This locating area is a rectangle frame, the length of rectangle frame horizontal direction is about 2 times of bottle head width, try one's best in the center of rectangular area horizontal direction and the center of bottle head width overlaps, and partial blank region more than bottle crown portion is included in rectangle frame, to guarantee to determine bottle position in crown portion exactly, each is detected body corresponding in this region;
(3) bottle head position is determined
After carrying out Threshold segmentation to the image gathered, obtain the first binary map, background is white, and target is black, and described threshold value is chosen according to standard below: make bottle head region be all black, and its peripheral region is white; According to the first binary map, horizontal direction and vertical direction projection are carried out respectively to the target in locating area in (2), find out in vertical direction projection the position Y1 that minimum point of counting is bottle vertical direction in crown portion, search for from the center of locating area horizontal direction respectively to both sides, find out in horizontal direction projection minimum point of counting, be respectively position X1 and X2 of bottle head both sides horizontal direction;
(4) Reference search zone and bench mark is determined
According to the position of bottle head in (3), with the position Y1 of bottle crown portion vertical direction for benchmark, offset downward different distances respectively, obtain the position on two limits of the rectangle frame vertical direction of Reference search zone, the center of Reference search frame horizontal direction and the center line of bottle head position are on same perpendicular line;
Respectively with position X1 and X2 of bottle head both sides horizontal direction for benchmark, inwardly, i.e. the center of Reference search zone horizontal direction, offsets certain distance, obtains the position on two limits of Reference search frame horizontal direction;
The size of Reference search zone is determined according to the size of reference area, reference area can be included in Reference search frame, and surrounding has certain space;
After carrying out Threshold segmentation to the image gathered, obtain the second binary map, described threshold value is chosen according to standard below: make reference area be all white, peripheral region is black.According to the second binary map, vertical direction projection is carried out to the target in Reference search zone, find out in vertical direction projection the position Y2 that maximum point of counting is bench mark vertical direction;
(5) liquid level region of search is determined
According to the position of bottle head in (3), with the position Y1 of bottle crown portion vertical direction for benchmark, offset downward different distances respectively, obtain the position on two limits of the vertical direction of liquid level region of search, the center of liquid level search box horizontal direction and the center line of bottle head position are on same perpendicular line;
Respectively with position X1 and X2 of bottle head both sides horizontal direction for benchmark, inwardly, i.e. the center of liquid level region of search horizontal direction, offsets certain distance, obtains the position on two limits of liquid level region of search horizontal direction;
After carrying out Threshold segmentation to the image gathered, obtain the 3rd binary map, described threshold value is chosen according to standard below: liquid level region is all black, and peripheral region is white.According to the 3rd described binary map, respectively vertical direction projection is carried out to the target and background in liquid level region of search, searches for from the top down, to find out in target vertical direction projection the position Y3 that first maximum of points is liquid level vertical direction center;
Then, be starting point with Y3, search for downwards, the position of counting that finding out from the projection of background vertical direction counts accounts for region of search width 70% is the position Y4 of liquid level nadir vertical direction;
(6) judge whether liquid level meets filling requirement
Difference D between the position Y2 of Calculation Basis point vertical direction and the position Y4 of liquid level nadir vertical direction, only have when the value of D is in preset range, liquid drug just meets filling requirement.
The present invention can detect quick, objective, exactly filling after medicine liquid level whether meet filling requirement, improve the precision and efficiency of detecting of drug quality.
Accompanying drawing explanation
The former figure of Fig. 1;
Fig. 2 locating area and being used for determines the binary picture of bottle head position;
Fig. 3 is used for determining the binary picture of benchmark;
Fig. 4 is used for determining the binary picture of liquid level;
Fig. 5 testing result figure.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be described, see Fig. 1-5.
(1) piece image is gathered
This image size is 1280*960 pixel, may comprise one or more detection target (body) in image, but each is detected the body of certain fixed position in image, and the body of other position does not detect.
In this example, as shown in Figure 1, image size is 1280*960 pixel to the image of collection, will detect the body of midway location.
(2) regioselective region
This locating area is a rectangle frame.During owing to automatically detecting, the each position in the picture of body may be different, in order to ensure at least to exist in rectangle frame a complete body, the length of rectangle frame horizontal direction is about 2 times of bottle head width, and the center of rectangular area horizontal direction as far as possible and the center coincidence of bottle head width.The length of the vertical direction of rectangle frame is about 160 pixels, must ensure that the white space of 30 pixels in more than the Neng Jiangping crown, rectangular area portion is included (guaranteeing to determine bottle position in crown portion exactly), but can not exceed image range.Each is detected body corresponding in this region.
In this example, at the body place of midway location, regioselective region, rectangular area as shown in Figure 2.The cross-directional length of search locating area is 800 pixels, and vertical-direction length is 140 pixels.In the drawings, because range image edge, bottle crown portion is closer, as long as so ensure that the upper limb of region of search does not exceed image here.Meanwhile, ensure that try one's best in the center of region of search horizontal direction and the center of bottle head width overlaps, namely left and right is as far as possible symmetrical about body center shaft.
(3) bottle head position is determined
After carrying out Threshold segmentation to the image gathered, obtain the first binary map, background is white, and target is black, and described threshold value is chosen according to standard below: make bottle head region be all black, and its peripheral region is white.According to the first binary map, horizontal direction and vertical direction projection are carried out respectively to the target in locating area in step (2).Find out in vertical direction projection the position Y1 that minimum point of counting is bottle vertical direction in crown portion.Search for respectively to both sides from the center of locating area horizontal direction, find out in horizontal direction projection minimum point of counting, be respectively position X1 and X2 of bottle head both sides horizontal direction.
In this example, Threshold segmentation is carried out to the image in Fig. 1, obtain binary map as shown in Figure 2, and horizontal direction and vertical direction projection are carried out respectively to the stain in step (in 2) locating area.Find out in vertical direction projection the position Y1 that minimum point of counting is bottle vertical direction in crown portion.Search for respectively to both sides from the center of locating area horizontal direction, find out in vertical direction projection minimum point of counting, be respectively position X1 and X2 of bottle head both sides horizontal direction.The position of bottle crown portion and both sides can be determined thus, as shown in Figure 5.
(4) bench mark is determined
According to the position of bottle head in step (3), determine the region of search of benchmark.With the position Y1 of bottle crown portion vertical direction for benchmark, offset downward different distances respectively, obtain the position on two limits of the rectangle frame vertical direction of Reference search zone, the center of Reference search frame horizontal direction and the center line of bottle head position are on same perpendicular line.
Respectively with position X1 and X2 of bottle head both sides horizontal direction for benchmark, inwardly (i.e. the center of Reference search zone horizontal direction) offsets certain distance (about 100 pixels), obtains the position on two limits of Reference search frame horizontal direction.
The size of Reference search zone is determined according to the size of reference area, reference area can be included in Reference search frame, and surrounding has certain space (5 to 20 pixels).
After carrying out Threshold segmentation to the image gathered, obtain the second binary map, described threshold value is chosen according to standard below: make reference area be all white, peripheral region is black.According to the second binary map, vertical direction projection is carried out to the target in Reference search zone.Find out in vertical direction projection the position Y2 that maximum point of counting is bench mark vertical direction.
In this example, according to the value of Y1, X1 and X2 in step (3), Reference search zone is determined, intermediate rectangular region as shown in Figure 5.The position on two limits of the vertical direction of Reference search zone, is respectively Y1 and offsets downward 190 and 230 pixels; The position on two limits of Reference search zone horizontal direction, for X1 and X2 offsets 100 pixels respectively to interior (i.e. the center of Reference search zone horizontal direction).
Vertical direction projection is carried out to the white point in reference area, finds out in vertical direction projection the position Y2 that maximum point of counting is bench mark vertical direction, as the scribing position in Reference search zone in Fig. 5.
(5) liquid level is determined
According to the position of bottle head in step (3), determine the region of search of liquid level.With the position Y1 of bottle crown portion vertical direction for benchmark, offset downward different distances respectively, obtain the position on two limits of the vertical direction of liquid level region of search, the center of liquid level search box horizontal direction and the center line of bottle head position are on same perpendicular line.
Respectively with position X1 and X2 of bottle head both sides horizontal direction for benchmark, inwardly (i.e. the center of liquid level region of search horizontal direction) offsets certain distance (about 50 pixels), obtains the position on two limits of liquid level region of search horizontal direction.
After carrying out Threshold segmentation to the image gathered, obtain the 3rd binary map, described threshold value is chosen according to standard below: liquid level region is all black, and peripheral region is white.According to the 3rd described binary map, respectively vertical direction projection is carried out to the target and background in liquid level region of search.Search for from the top down, to find out in target vertical direction projection the position Y3 that first maximum of points is liquid level vertical direction center.
Then, be starting point with Y3, search for downwards, the position of counting that finding out from the projection of background vertical direction counts accounts for region of search width 70% is the position Y4 of liquid level nadir vertical direction.Here, should be from the projection of background vertical direction, find first maxim namely to think the position of liquid level nadir vertical direction in theory, but place has bubble sometimes due to liquid level, interference can be caused to the judgement of liquid level, so select the position of counting accounting for region of search width 70%, thus ensure to cause erroneous judgement because of bubble.
In this example., according to the value of Y1, X1 and X2 in step (3), determine liquid level region of search, bottom rectangle region as shown in Figure 5.The position on two limits of the vertical direction of liquid level region of search, is respectively Y1 and offsets downward 700 and 940 pixels; The position on two limits of Reference search zone horizontal direction, for X1 and X2 offsets 50 pixels respectively to interior (i.e. the center of Reference search zone horizontal direction).
Respectively vertical direction projection is carried out to the stain in liquid level region and white point, searches for from the top down, find out first maximum of points in the projection of stain vertical direction and be the position Y3 at liquid level vertical direction center; Be starting point with Y3, search for downwards, the position of counting that finding out from the projection of background vertical direction counts accounts for region of search width 70% is the position Y4 of liquid level nadir vertical direction.As the scribing position in liquid level region of search in Fig. 5.
(6) judge whether liquid level meets filling requirement
Obtain the difference D of the position Y2 of bench mark vertical direction and the position Y4 of liquid level vertical direction, only have when the value of Y5 is between setting range Dmin and Dmax, liquid drug just meets filling requirement.If the value of Y5 is greater than the maxim Dmax in setting range, so the filling deficiency of liquid drug is described; If the value of Y5 is less than the minimum value Dmin in setting range.So illustrate that liquid drug is filling excessive.
In this example, be 527 (units: pixel) by detecting the difference D of the Y4 in the Y2 that obtains in step (4) and step (5), according to Test Field demand, Dmin is set to 509, Dmax and is set to 590.Y5 is between 509 and 590.So this medicine meets filling requirement.
Claims (1)
1. detect the method whether body liquid level meets filling requirement, comprise the following steps:
(1) gather a width comprise filling after the image of body;
(2) regioselective region
This locating area is a rectangle frame, the length of rectangle frame horizontal direction is about 2 times of bottle head width, try one's best in the center of rectangular area horizontal direction and the center of bottle head width overlaps, and partial blank region more than bottle crown portion is included in rectangle frame, to guarantee to determine bottle position in crown portion exactly, each is detected body corresponding in this region;
(3) bottle head position is determined
After carrying out Threshold segmentation to the image gathered, obtain the first binary map, background is white, and target is black, and described threshold value is chosen according to standard below: make bottle head region be all black, and its peripheral region is white; According to the first binary map, horizontal direction and vertical direction projection are carried out respectively to the target in locating area in (2), find out in vertical direction projection the position Y1 that minimum point of counting is bottle vertical direction in crown portion, search for from the center of locating area horizontal direction respectively to both sides, find out in horizontal direction projection minimum point of counting, be respectively position X1 and X2 of bottle head both sides horizontal direction;
(4) Reference search zone and bench mark is determined
According to the position of bottle head in (3), with the position Y1 of bottle crown portion vertical direction for benchmark, offset downward different distances respectively, obtain the position on two limits of the rectangle frame vertical direction of Reference search zone, the center of Reference search frame horizontal direction and the center line of bottle head position are on same perpendicular line;
Respectively with position X1 and X2 of bottle head both sides horizontal direction for benchmark, inwardly, i.e. the center of Reference search zone horizontal direction, offsets certain distance, obtains the position on two limits of Reference search frame horizontal direction;
The size of Reference search zone is determined according to the size of reference area, reference area can be included in Reference search frame, and surrounding has certain space;
After carrying out Threshold segmentation to the image gathered, obtain the second binary map, described threshold value is chosen according to standard below: make reference area be all white, peripheral region is black.According to the second binary map, vertical direction projection is carried out to the target in Reference search zone, find out in vertical direction projection the position Y2 that maximum point of counting is bench mark vertical direction;
(5) liquid level region of search is determined
According to the position of bottle head in (3), with the position Y1 of bottle crown portion vertical direction for benchmark, offset downward different distances respectively, obtain the position on two limits of the vertical direction of liquid level region of search, the center of liquid level search box horizontal direction and the center line of bottle head position are on same perpendicular line;
Respectively with position X1 and X2 of bottle head both sides horizontal direction for benchmark, inwardly, i.e. the center of liquid level region of search horizontal direction, offsets certain distance, obtains the position on two limits of liquid level region of search horizontal direction;
After carrying out Threshold segmentation to the image gathered, obtain the 3rd binary map, described threshold value is chosen according to standard below: liquid level region is all black, and peripheral region is white.According to the 3rd described binary map, respectively vertical direction projection is carried out to the target and background in liquid level region of search, searches for from the top down, to find out in target vertical direction projection the position Y3 that first maximum of points is liquid level vertical direction center;
Then, be starting point with Y3, search for downwards, the position of counting that finding out from the projection of background vertical direction counts accounts for region of search width 70% is the position Y4 of liquid level nadir vertical direction;
(6) judge whether liquid level meets filling requirement
Difference D between the position Y2 of Calculation Basis point vertical direction and the position Y4 of liquid level nadir vertical direction, only have when the value of D is in preset range, liquid drug just meets filling requirement.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109357703A (en) * | 2018-11-30 | 2019-02-19 | 双峰格雷斯海姆医药包装（镇江）有限公司 | A kind of medicine bottle bottle head direction detection device |
| CN116281815A (en) * | 2023-05-22 | 2023-06-23 | 小仙炖霸州食品有限公司 | Liquid quantitative filling equipment |
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| CN102519972A (en) * | 2011-12-10 | 2012-06-27 | 山东明佳包装检测科技有限公司 | Detection method of PET bottle cap and liquid level |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109357703A (en) * | 2018-11-30 | 2019-02-19 | 双峰格雷斯海姆医药包装（镇江）有限公司 | A kind of medicine bottle bottle head direction detection device |
| CN109357703B (en) * | 2018-11-30 | 2024-04-26 | 双峰格雷斯海姆医药包装（镇江）有限公司 | Medical glass bottle head direction detection device |
| CN116281815A (en) * | 2023-05-22 | 2023-06-23 | 小仙炖霸州食品有限公司 | Liquid quantitative filling equipment |
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