CN116106312A - Product detection method and device, storage medium and electronic equipment - Google Patents
Product detection method and device, storage medium and electronic equipment Download PDFInfo
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- CN116106312A CN116106312A CN202211643784.0A CN202211643784A CN116106312A CN 116106312 A CN116106312 A CN 116106312A CN 202211643784 A CN202211643784 A CN 202211643784A CN 116106312 A CN116106312 A CN 116106312A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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Abstract
The invention discloses a product detection method and device, a storage medium and electronic equipment. The product detection method comprises the following steps: controlling the camera to move along the current edge of the product and detecting the current position of the camera; and controlling the camera to shoot in a detection interval, acquiring an image shot by the current edge before the camera every time the camera leaves one detection interval, and processing the acquired image through a first preset algorithm. Through the technical scheme, the total travel of the motion shooting is divided into a plurality of detection intervals, and the images shot in the single detection interval are processed by taking the intervals as units, so that smaller images can be processed in time, all processing work is prevented from being concentrated after all shooting is finished, and the detection efficiency is effectively improved.
Description
Technical Field
The invention relates to the field of visual detection, in particular to a product detection method and device, a storage medium and electronic equipment.
Background
In the industrial field, there is often a need for defect detection of products, wherein visual detection is a very common type of detection.
In general, visual inspection requires photographing a product to be inspected by a camera, collecting images of the product to be inspected, and then processing the images by an image processing algorithm to identify whether the product has defects.
As the structure of the product continues to be complex, the requirements for cameras used in visual inspection schemes are also increasing, requiring the cameras to be able to present many details of the product. This causes the image taken by the camera to contain a very large amount of data.
Taking an example of an edge detection device of a liquid crystal display panel, such devices often adopt a line scanning camera to shoot the edge of the panel to be detected, and the line scanning camera can move along the edge of the panel to be detected under the drive of a motion mechanism and shoot in real time in the moving process. When shooting is completed on one whole edge of the panel to be detected, an image processing algorithm is called to process the shot image, and meanwhile, the panel is rotated or the position of a camera is adjusted to shoot the next edge of the panel until all edges are shot and detected.
Because the shooting accuracy of the line scanning camera is very high, the definition and the data volume of the shot image are very large, if the size of the liquid crystal panel is also relatively large, the data volume of the shot image of one edge of the liquid crystal panel is very large, so that a lot of time is required to process the line scanning image corresponding to one edge to identify defects, when shooting of the next edge is likely to be required, the shot image of the previous edge is not processed, waiting is required, and therefore the whole detection efficiency is difficult to ensure.
Not only the panel edge detection schemes listed above, but in fact many other industrial vision detection scenarios also suffer from similar problems.
For the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The invention aims to provide a product detection scheme, a storage medium and electronic equipment which can effectively solve the technical problems.
In order to achieve the above object, according to one aspect of the present invention, there is provided a product detection method for photographing an edge of a product by means of a camera, and a stroke of a motion when the camera photographs a single edge of the product includes a plurality of detection sections. The product detection method comprises the following steps:
controlling the camera to move along the current edge of the product and detecting the current position of the camera;
and controlling the camera to shoot in a detection interval, acquiring an image shot by the current edge before the camera every time the camera leaves one detection interval, and processing the acquired image through a first preset algorithm.
Wherein detecting the current position of the camera comprises:
receiving a pulse signal sent by a position detection mechanism arranged on a motion driving assembly of a camera, wherein the position detection mechanism sends out the pulse signal in the process that the motion driving assembly drives the camera to move;
and determining the current position of the camera according to the number of the pulse signals which are currently received in an accumulated mode, wherein boundary values are correspondingly configured at boundary positions between two adjacent detection intervals, and determining that the camera leaves one detection interval and enters the next detection interval when the number of the pulse signals which are currently received in the accumulated mode reaches one boundary value.
Optionally, the stroke of the movement when the camera shoots the single edge of the product further comprises a plurality of non-detection intervals, and no intersection exists between the non-detection intervals and the detection intervals;
and, the method further comprises:
and controlling the camera to stop shooting in the non-detection interval.
Further, in this case, detecting the current position of the camera includes:
receiving a pulse signal sent by a position detection mechanism arranged on a motion driving assembly of a camera, wherein the position detection mechanism sends out the pulse signal in the process that the motion driving assembly drives the camera to move;
and determining the current position of the camera according to the number of the current accumulated received pulse signals, wherein a demarcation value is correspondingly configured in the initial position corresponding to the first section and the boundary position between two adjacent sections, and the section type to be entered is a detection section or a non-detection section, and determining the section type to be entered by the camera according to the section type corresponding to the demarcation value when the number of the current accumulated received pulse signals reaches a demarcation value.
In addition, the method may further include:
providing a user interface, wherein the interface is provided with an area for a user to configure the position of each detection interval and non-detection interval;
and determining a starting position of the first section, a demarcation value corresponding to a boundary position between two adjacent sections and a corresponding section type according to the position of each detection section and each non-detection section input by a user.
In addition, each time the camera leaves a detection zone, acquiring an image that has been captured by the camera for the current edge before the camera, and processing the acquired image by a first preset algorithm includes:
and acquiring an image shot by the camera in a currently-separated interval, and processing the image shot in the detection interval.
The method may further comprise:
and processing the whole images shot in all the detection intervals by a second preset algorithm.
According to another aspect of the present invention, there is also provided a product detection apparatus for photographing an edge of a product with a camera, and a stroke of movement of the camera when photographing a single edge of the product includes a plurality of detection sections, the product detection apparatus comprising:
a first control module for controlling the movement of the camera along the current edge of the product;
a position detection module for detecting a current position of the camera;
the second control module is used for controlling the camera to shoot in a detection interval, acquiring an image shot by the current edge before the camera every time the camera leaves one detection interval, and processing the acquired image through a first preset algorithm.
In one embodiment, the position detection module is used for receiving a pulse signal sent by a position detection mechanism installed on a motion driving component of the camera, wherein the position detection mechanism sends out the pulse signal in the process that the motion driving component drives the camera to move; and determining the current position of the camera according to the number of the pulse signals received in the current accumulation, wherein boundary values are correspondingly configured at the boundary positions between two adjacent detection intervals, and determining that the camera leaves one detection interval and enters the next detection interval when the number of the pulse signals received in the current accumulation reaches one boundary value.
Optionally, the stroke of the movement when the camera shoots the single edge of the product further comprises a plurality of non-detection intervals, and no intersection exists between the non-detection intervals and the detection intervals;
and the second control module is also used for controlling the camera to stop shooting in the non-detection interval.
Further, in this case, the position detection module is further configured to receive a pulse signal sent by a position detection mechanism mounted on a motion driving component of the camera, where the position detection mechanism sends out the pulse signal during the process that the motion driving component drives the camera to move; and determining the current position of the camera according to the number of the currently accumulated received pulse signals, wherein a demarcation value and a section type to be entered by the camera are correspondingly configured according to the starting position of the first section and the boundary position between two adjacent sections, and when the number of the currently accumulated received pulse signals reaches a demarcation value, the section type to be entered by the camera is determined according to the section type corresponding to the demarcation value.
In addition, the apparatus may further include: the display module is used for providing a user interface, and the interface is provided with an area for a user to configure the position of each detection interval and each non-detection interval;
and determining a starting position of the first section, a demarcation value corresponding to a boundary position between two adjacent sections and a corresponding section type according to the position of each detection section and each non-detection section input by a user.
In addition, the second control module may acquire an image captured by the camera in a currently-leaving section and process the image captured in the detection section each time the camera leaves one detection section.
In addition, the second control module can be further used for processing the whole images shot in all detection intervals through a second preset algorithm.
According to still another aspect of the present invention, there is provided a storage medium storing a computer program for executing the above-described product detection method when the computer program is executed.
According to a further aspect of the present invention there is provided an electronic device comprising a processor and a memory, said processor and said memory being connected by a bus, characterized in that said memory has stored therein a computer program which when invoked by said processor performs the above-mentioned product detection method.
According to the technical scheme, the total travel of the motion shooting is divided into a plurality of detection intervals, and the images shot in a single detection interval are processed by taking the intervals as units, so that smaller images can be processed in time, all processing work is prevented from being concentrated after all shooting is finished, and the detection efficiency is effectively improved; in addition, by configuring the non-detection interval, the shooting of a single edge of a product and defect identification can be more flexible and controllable, the position unnecessary to detect can be skipped, invalid images are prevented from being processed, and the detection efficiency is further improved.
Drawings
FIG. 1 is a flow chart of a product detection method according to an embodiment of the invention;
fig. 2 is a block diagram of a product detection apparatus according to an embodiment of the present invention.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In the present invention, unless otherwise indicated, terms of orientation such as "upper and lower" are used to generally refer to the relative positions of the opening and closing cover apparatus in the use state. The terms "first," "second," and the like, are used merely to distinguish one same or similar characteristic from another and do not denote a sequence or importance.
According to one embodiment of the present invention, there is provided a product detection method for photographing an edge of a product with a camera, and a stroke of movement when the camera photographs a single edge of the product includes a plurality of detection sections.
As shown in fig. 1, a product detection method according to an embodiment of the present invention includes:
step S101, controlling a camera to move along the current edge of a product, and detecting the current position of the camera;
in step S102, the camera is controlled to take a picture in a detection section, and each time the camera leaves one detection section, an image that has been taken by the current edge before the camera (preferably, an image taken in the current detection section) is acquired, and the acquired image is processed by a first preset algorithm.
Through the technical scheme, the total travel of the motion shooting is divided into a plurality of detection intervals, and the images shot in the single detection interval are processed by taking the intervals as units, so that smaller images can be processed in time, all processing work is prevented from being concentrated after all shooting is finished, and the detection efficiency is effectively improved.
In one embodiment, in detecting the current position of the camera, the following may be specifically used:
the device can receive the pulse signal sent by the position detection mechanism arranged on the movement driving assembly of the camera, wherein the position detection mechanism sends out the pulse signal in the process that the movement driving assembly drives the camera to move;
and determining the current position of the camera according to the number of the pulse signals which are currently received in an accumulated mode, wherein boundary values are correspondingly configured at boundary positions between two adjacent detection intervals, and determining that the camera leaves one detection interval and enters the next detection interval when the number of the pulse signals which are currently received in the accumulated mode reaches one boundary value.
In practical application, a grating ruler (or a magnetic grating ruler or the like) can be installed on a moving component of the camera, and the grating ruler is used as a position detection mechanism of the camera and used for detecting the position of the camera, and the grating ruler continuously sends pulse signals to the PLC or the operation control card in the process that the camera moves along one side of a product to be detected (such as a display panel) and shoots; the PLC and the operation control card are controllers and are used for controlling the movement of the shaft and the module; that is, the PLC and the motion control card are used to indirectly control the line scan camera motion.
Assuming that the camera is driven by the motion mechanism to move at a uniform speed from the stroke starting point to the stroke ending point, the grating ruler can send 10000 pulses, and 2000, 5000 and 9000 can be preset at this time to serve as demarcation values, so that the whole stroke is divided into four detection sections: 0-2000, 2001-5000, 5001-9000 and 9001-10000. In actual photographing, when the 2000 th pulse is received, the camera is considered to be about to leave the first detection section and enter the next detection section. At this time, an image captured by the camera in the detection interval of 0-2000 is acquired, and whether the image has a defect is determined by using a first preset algorithm.
In addition, in an alternative embodiment, the travel of the camera when shooting a single edge of the product further comprises a plurality of non-detection intervals, and no intersection exists between the non-detection intervals and the detection intervals;
at this time, during the movement of the camera, photographing is normally performed in the detection section, but not in the non-detection section.
In this case, the current position of the camera can still be detected by means of a judgment of the number of pulses. The method comprises the steps that a demarcation value is correspondingly configured corresponding to the starting position of a first section and the boundary position between two adjacent sections, the type of the section to be entered is a detection section or a non-detection section, and when the number of pulse signals currently received in an accumulated mode reaches a demarcation value, the type of the section to be entered of a camera is determined according to the type of the section corresponding to the demarcation value.
For example, assume that the grating ruler transmits 10000 pulses during the uniform motion of the camera from the start point to the end point of the travel under the driving of the motion mechanism, and the entire travel needs to be divided into three detection sections 0-2000, 5001-9000, 9001-10000 and one non-detection section 2001-5000. In this case, the boundary values of 0, 2000, 5000, 9000 may be preset, and the detection intervals of 0 to 2000, 5001 to 9000, 9001 to 10000 are all the detection intervals, so that the intervals to be entered may be configured as the detection intervals of the boundary values of 0, 5000, 9000, and the intervals to be entered may be configured as the non-detection intervals of the boundary value of 2000.
By configuring the non-detection interval, the shooting and defect identification of a single edge of a product can be more flexible and controllable, on one hand, the position of the product which is not necessary to detect can be skipped, invalid images can be avoided being processed, and on the other hand, under the condition that imaging quality cannot be ensured due to the fact that detection equipment is problematic and the image of a certain part in a camera stroke can be directly prevented from being shot at the invalid positions, so that the detection efficiency can be further improved.
In addition, the scheme of the invention can also support the configuration of the detection interval and the non-detection interval by a user.
When the scheme of the invention is applied to the product detection equipment, a user interface can be provided, and the interface is provided with an area for a user to configure the position of each detection interval and each non-detection interval;
and determining a starting position of the first section, a demarcation value corresponding to a boundary position between two adjacent sections and a corresponding section type according to the position of each detection section and each non-detection section input by a user.
The specific distance value can be input in the interface by the user, the distance value input by the user can be converted into the pulse number to be used as a demarcation value for recording based on the total stroke length and the corresponding total pulse number, and meanwhile, the interval type can also be recorded.
In addition, each time the camera leaves a detection zone, acquiring an image that has been captured by the camera for the current edge before the camera, and processing the acquired image by a first preset algorithm includes:
and acquiring an image shot by the camera in a detection interval which is currently away, and processing only the image shot in the detection interval.
In addition, the first preset algorithm of the present invention may be mainly used for identifying small-sized defects, such as broken edges, shells, burrs, and the like. If a defect with a larger size, such as a crack, needs to be identified, the processing can still be performed according to the complete edge image. In an alternative embodiment, the product detection method of the present invention may further include: and processing the whole images shot in all the detection intervals by a second preset algorithm.
Further, the camera mentioned herein may be a line scan camera, which can continuously take a picture in the process, resulting in an image of the object to be taken.
According to another embodiment of the present invention, there is also provided a product detection apparatus for photographing an edge of a product with a camera, and a stroke of movement when the camera photographs a single edge of the product includes a plurality of detection sections.
As shown in fig. 2, the product detection apparatus according to an embodiment of the present invention includes:
a first control module for controlling the movement of the camera along the current edge of the product;
the position detection module is used for detecting the current position of the camera;
the second control module is used for controlling the camera to shoot in the detection interval, acquiring an image shot by the current edge before the camera every time the camera leaves one detection interval, and processing the acquired image through a first preset algorithm.
In one embodiment, the position detection module is used for receiving a pulse signal sent by a position detection mechanism installed on a motion driving component of the camera, wherein the position detection mechanism sends out the pulse signal in the process that the motion driving component drives the camera to move; and determining the current position of the camera according to the number of the pulse signals received in the current accumulation, wherein boundary values are correspondingly configured at the boundary positions between two adjacent detection intervals, and determining that the camera leaves one detection interval and enters the next detection interval when the number of the pulse signals received in the current accumulation reaches one boundary value.
Optionally, the stroke of the movement when the camera shoots the single edge of the product further comprises a plurality of non-detection intervals, and no intersection exists between the non-detection intervals and the detection intervals;
and the second control module is also used for controlling the camera to stop shooting in the non-detection interval.
Further, in this case, the position detection module is further configured to receive a pulse signal sent by a position detection mechanism mounted on a motion driving component of the camera, where the position detection mechanism sends out the pulse signal during the process that the motion driving component drives the camera to move; and determining the current position of the camera according to the number of the currently accumulated received pulse signals, wherein a demarcation value and a section type to be entered by the camera are correspondingly configured according to the starting position of the first section and the boundary position between two adjacent sections, and when the number of the currently accumulated received pulse signals reaches a demarcation value, the section type to be entered by the camera is determined according to the section type corresponding to the demarcation value.
In addition, the apparatus may further include: the display module is used for providing a user interface, and the interface is provided with an area for a user to configure the position of each detection interval and each non-detection interval;
and determining a starting position of the first section, a demarcation value corresponding to a boundary position between two adjacent sections and a corresponding section type according to the position of each detection section and each non-detection section input by a user.
In addition, the second control module may acquire an image captured by the camera in a currently-leaving section and process the image captured in the detection section each time the camera leaves one detection section.
In addition, the second control module can be used for splicing the images shot in all the detection intervals; and processing the spliced images through a second preset algorithm.
According to a further aspect of the present invention, there is provided a storage medium storing a computer program for executing the above-described product detection method when the computer program is run.
According to a further aspect of the present invention there is provided an electronic device comprising a processor and a memory, the processor and the memory being connected by a bus, characterized in that the memory stores a computer program which when invoked by the processor performs the above product detection method.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto.
Within the scope of the technical idea of the invention, a number of simple variants of the technical solution of the invention are possible, including combinations of individual specific technical features in any suitable way.
The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition. Such simple variations and combinations are likewise to be regarded as being within the scope of the present disclosure.
Claims (10)
1. A product detection method for photographing an edge of a product with a camera, and a stroke of movement of the camera when photographing a single edge of the product includes a plurality of detection sections, the product detection method comprising:
controlling the camera to move along the current edge of the product and detecting the current position of the camera;
and controlling the camera to shoot in a detection interval, acquiring an image shot by the current edge before the camera every time the camera leaves one detection interval, and processing the acquired image through a first preset algorithm.
2. The product detection method of claim 1, wherein detecting the current position of the camera comprises:
receiving a pulse signal sent by a position detection mechanism arranged on a motion driving assembly of a camera, wherein the position detection mechanism sends out the pulse signal in the process that the motion driving assembly drives the camera to move;
and determining the current position of the camera according to the number of the pulse signals which are currently received in an accumulated mode, wherein boundary values are correspondingly configured at boundary positions between two adjacent detection intervals, and determining that the camera leaves one detection interval and enters the next detection interval when the number of the pulse signals which are currently received in the accumulated mode reaches one boundary value.
3. The product detection method of claim 1, wherein the stroke of the camera's movement when shooting a single edge of the product further comprises a plurality of non-detection intervals, the non-detection intervals and the detection intervals having no intersection therebetween;
and, the method further comprises:
and controlling the camera to stop shooting in the non-detection interval.
4. A product detection method as claimed in claim 3, wherein detecting the current position of the camera comprises:
receiving a pulse signal sent by a position detection mechanism arranged on a motion driving assembly of a camera, wherein the position detection mechanism sends out the pulse signal in the process that the motion driving assembly drives the camera to move;
and determining the current position of the camera according to the number of the current accumulated received pulse signals, wherein a demarcation value is correspondingly configured in the initial position corresponding to the first section and the boundary position between two adjacent sections, and the section type to be entered is a detection section or a non-detection section, and determining the section type to be entered by the camera according to the section type corresponding to the demarcation value when the number of the current accumulated received pulse signals reaches a demarcation value.
5. The product detection method of claim 4, further comprising:
providing a user interface, wherein the interface is provided with an area for a user to configure the position of each detection interval and non-detection interval;
and determining a starting position of the first section, a demarcation value corresponding to a boundary position between two adjacent sections and a corresponding section type according to the position of each detection section and each non-detection section input by a user.
6. The product detection method according to claim 1, wherein acquiring an image that has been taken by the camera before the current edge every time the camera leaves one detection zone, and processing the acquired image by a first preset algorithm comprises:
and acquiring an image shot by the camera in a currently-separated interval, and processing the image shot in the detection interval.
7. The product detection method of claim 1, further comprising:
and processing the whole images shot in all the detection intervals by a second preset algorithm.
8. A product inspection device for photographing an edge of a product with a camera, and a stroke of movement of the camera when photographing a single edge of the product includes a plurality of inspection sections, the product inspection device comprising:
a first control module for controlling the movement of the camera along the current edge of the product;
a position detection module for detecting a current position of the camera;
the second control module is used for controlling the camera to shoot in a detection interval, acquiring an image shot by the current edge before the camera every time the camera leaves one detection interval, and processing the acquired image through a first preset algorithm.
9. A storage medium storing a computer program which, when executed, is adapted to carry out the product detection method according to any one of claims 1 to 7.
10. An electronic device comprising a processor and a memory, the processor and the memory being connected by a bus, characterized in that the memory has stored therein a computer program which, when invoked by the processor, performs the product detection method according to any one of claims 1 to 7.
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| CN202211643784.0A CN116106312A (en) | 2022-12-20 | 2022-12-20 | Product detection method and device, storage medium and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211643784.0A CN116106312A (en) | 2022-12-20 | 2022-12-20 | Product detection method and device, storage medium and electronic equipment |
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| CN116106312A true CN116106312A (en) | 2023-05-12 |
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| CN202211643784.0A Pending CN116106312A (en) | 2022-12-20 | 2022-12-20 | Product detection method and device, storage medium and electronic equipment |
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