CN115830043B - Boundary detection method, device, equipment and storage medium for wireless charging magnet - Google Patents
Boundary detection method, device, equipment and storage medium for wireless charging magnet Download PDFInfo
- Publication number
- CN115830043B CN115830043B CN202310023655.XA CN202310023655A CN115830043B CN 115830043 B CN115830043 B CN 115830043B CN 202310023655 A CN202310023655 A CN 202310023655A CN 115830043 B CN115830043 B CN 115830043B
- Authority
- CN
- China
- Prior art keywords
- boundary
- magnet
- image
- detected
- magnet ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Abstract
The invention belongs to the technical field of image processing, and discloses a boundary detection method, device and equipment for a wireless charging magnet and a storage medium. The method comprises the following steps: acquiring an image to be detected of a magnet ring to be detected; determining a boundary conversion image according to the image center of the image to be detected and the preset magnet size; dividing the boundary conversion image into areas, and determining the whole boundary of the magnet ring to be detected; determining a magnet boundary image of the magnet ring to be detected according to the integral boundary and the boundary conversion image; and finishing boundary detection of the magnet ring to be detected according to the magnet boundary image. The calculation difficulty of the whole boundary is reduced, the magnet boundary image of the magnet ring to be detected is determined based on the whole boundary and the boundary conversion image, and the boundary of each single magnet in the magnet ring to be detected can be determined based on the magnet boundary image, so that the boundary detection of the magnet ring to be detected is completed, and the accuracy of the wireless charging of the boundary detection of the magnet ring to be detected is ensured.
Description
Technical Field
The present invention relates to the field of image processing technologies, and in particular, to a method, an apparatus, a device, and a storage medium for detecting a boundary of a wireless charging magnet.
Background
When the traditional area extraction algorithm is applied to the wireless ring-shaped combined magnet, the contrast requirements on the magnet and the background are strict and limited by the process of the magnet, and when the magnet is deviated or broken, the boundary of the magnet cannot be accurately judged, so that the area is excessively extracted or excessively extracted, and the boundary detection result of the wireless ring-shaped combined magnet is inaccurate.
Disclosure of Invention
The invention mainly aims to provide a boundary detection method, device and equipment for a wireless charging magnet and a storage medium, and aims to solve the technical problem of how to accurately detect the boundary of a wireless charging ring-shaped combined magnet in the prior art.
In order to achieve the above object, the present invention provides a boundary detection method of a wireless charging magnet, the boundary detection method of the wireless charging magnet comprising:
acquiring an image to be detected of a magnet ring to be detected;
determining a boundary conversion image according to the image center of the image to be detected and the preset magnet size;
dividing the boundary conversion image into areas, and determining the whole boundary of the magnet ring to be detected;
Determining a magnet boundary image of the magnet ring to be detected according to the integral boundary and the boundary conversion image;
and finishing boundary detection of the magnet ring to be detected according to the magnet boundary image.
Optionally, the determining the boundary conversion image according to the image center of the image to be detected and the preset magnet size includes:
calculating the initial edge position of the magnet ring to be detected according to the image center of the image to be detected;
determining a target edge according to the initial edge position and the preset magnet size;
determining a target magnet ring image according to the target edge and the image to be detected;
and performing polar coordinate conversion on the target magnet ring image to obtain a boundary conversion image.
Optionally, the performing area division on the boundary conversion image to determine the overall boundary of the magnet ring to be detected includes:
dividing the boundary conversion image into areas to obtain a first conversion image, a second conversion image and a third conversion image;
determining the transverse boundary of the magnet ring to be detected according to the first conversion image and the second conversion image;
determining the longitudinal boundary of the magnet ring to be detected according to the third conversion image;
And determining the whole boundary of the magnet ring to be detected according to the transverse boundary and the longitudinal boundary.
Optionally, the determining the longitudinal boundary of the magnet ring to be detected according to the third conversion image includes:
determining a region midline from the third transformed image;
extracting a bright contour from the third converted image according to the regional center line to obtain a first contour line;
fitting according to the first contour line to obtain a second contour line;
and screening the second contour line according to a preset direction and a preset magnet size, and determining the longitudinal boundary of the magnet ring to be detected.
Optionally, the screening the second contour line according to a preset direction and a preset magnet size, and determining the longitudinal boundary of the to-be-detected magnet ring includes:
filtering the second contour line according to the preset direction and the preset magnet size to obtain a third contour line;
determining the number of combined magnets according to the magnet ring to be detected;
determining a target screening contour number according to the number of the combined magnets;
when the number of the third contour lines is larger than the target screening contour number, screening the third contour lines according to the equivalent radius of the third contour lines;
And determining the longitudinal boundary of the magnet ring to be detected according to the screening result of the third contour line.
Optionally, the determining the longitudinal boundary of the magnet ring to be detected according to the screening result of the third contour line includes:
determining a fourth profile according to the screening result of the third profile;
determining a magnet gap region according to the fourth contour line and the region center line;
determining a residual area on the pixel area according to the pixel area of the central line of the area and the magnet gap area;
determining the side boundary of the magnet ring to be detected according to the residual area;
and determining the longitudinal boundary of the magnet ring to be detected according to the fourth contour line and the side boundary.
Optionally, the determining the lateral boundary of the magnet ring to be detected according to the first conversion image and the second conversion image includes:
traversing the first conversion image and the second conversion image, and determining a first boundary of each combined magnet in the magnet ring to be detected;
determining a second boundary of each combined magnet in the magnet ring to be detected according to the regional center line of the third conversion image, the first boundary and a preset magnet size;
And determining the transverse boundary of the magnet ring to be detected according to the first boundary and the second boundary.
In addition, in order to achieve the above object, the present invention also provides a boundary detection device for a wireless charging magnet, the boundary detection device for a wireless charging magnet includes:
the acquisition module is used for acquiring an image to be detected of the magnet ring to be detected;
the determining module is used for determining a boundary conversion image according to the image center of the image to be detected and the preset magnet size;
the dividing module is used for dividing the boundary conversion image into areas and determining the whole boundary of the magnet ring to be detected;
the determining module is used for determining a magnet boundary image of the magnet ring to be detected according to the integral boundary and the boundary conversion image;
and the completion module is used for completing the boundary detection of the magnet ring to be detected according to the magnet boundary image.
In addition, in order to achieve the above object, the present invention also proposes a boundary detection apparatus of a wireless charging magnet, the boundary detection apparatus of the wireless charging magnet comprising: the wireless charging system comprises a memory, a processor and a wireless charging magnet boundary detection program stored on the memory and capable of running on the processor, wherein the wireless charging magnet boundary detection program is configured to realize the wireless charging magnet boundary detection method.
In addition, in order to achieve the above object, the present invention also proposes a storage medium having stored thereon a boundary detection program of a wireless charging magnet, which when executed by a processor, implements the boundary detection method of a wireless charging magnet as described above.
The method comprises the steps of obtaining an image to be detected of a magnet ring to be detected; determining a boundary conversion image according to the image center of the image to be detected and the preset magnet size; dividing the boundary conversion image into areas, and determining the whole boundary of the magnet ring to be detected; determining a magnet boundary image of the magnet ring to be detected according to the integral boundary and the boundary conversion image; and finishing boundary detection of the magnet ring to be detected according to the magnet boundary image. According to the method, the boundary conversion image is determined based on the image center of the image to be detected and the preset magnet size, and the whole boundary of the magnet ring to be detected is determined through the boundary conversion image, so that the calculation difficulty of the whole boundary is reduced, the magnet boundary image of the magnet ring to be detected is determined based on the whole boundary and the boundary conversion image, the boundary of each single magnet in the magnet ring to be detected can be determined based on the magnet boundary image, the boundary detection of the magnet ring to be detected is completed, and the accuracy of the wireless charging of the magnet ring to be detected in the boundary detection process is guaranteed.
Drawings
FIG. 1 is a schematic diagram of a wireless magnet-filled boundary detection device for a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart of a first embodiment of a method for detecting a boundary of a wireless charging magnet according to the present invention;
FIG. 3 is a schematic diagram illustrating a method for detecting a boundary of a wireless charging magnet according to an embodiment of the present invention;
FIG. 4 is a flowchart of a second embodiment of a method for detecting a boundary of a wireless charging magnet according to the present invention;
FIG. 5 is a schematic diagram illustrating a boundary of a wireless charging method according to an embodiment of the present invention;
fig. 6 is a block diagram of a first embodiment of a wireless-charged boundary detection apparatus according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a wireless magnet-charging boundary detection device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the boundary detecting apparatus of the wireless charging magnet may include: a processor 1001, such as a central processing unit (Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, a memory 1005. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (Wi-Fi) interface). The Memory 1005 may be a high-speed random access Memory (Random Access Memory, RAM) Memory or a stable nonvolatile Memory (NVM), such as a disk Memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the structure shown in fig. 1 does not constitute a limitation of the wireless charging boundary detection apparatus, and may include more or fewer components than shown, or may combine certain components, or may have a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and a boundary detection program of a wireless charging magnet may be included in the memory 1005 as one type of storage medium.
In the wireless-magnet-filled boundary detection apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the wireless magnet-filled boundary detection device of the present invention may be disposed in the wireless magnet-filled boundary detection device, where the wireless magnet-filled boundary detection device invokes a wireless magnet-filled boundary detection program stored in the memory 1005 through the processor 1001, and executes the wireless magnet-filled boundary detection method provided by the embodiment of the present invention.
The embodiment of the invention provides a boundary detection method of a wireless charging magnet, and referring to fig. 2, fig. 2 is a flow chart of a first embodiment of the boundary detection method of the wireless charging magnet.
The boundary detection method of the wireless magnet comprises the following steps:
step S10: and obtaining an image to be detected of the magnet ring to be detected.
It should be noted that, the execution main body terminal device of the embodiment may be a computer, a mobile phone or a tablet and other intelligent terminals, and the embodiment is not limited to this, and there is a boundary detection system of a wireless magnet charging on the terminal device, where the boundary detection system of the wireless magnet charging obtains an image to be detected of a magnet ring to be detected, determines a boundary conversion image according to an image center of the image to be detected and a preset magnet size, performs region division on the boundary conversion image, determines an overall boundary of the magnet ring to be detected, determines a magnet boundary image of the magnet ring to be detected according to the overall boundary and the boundary conversion image, and completes boundary detection of the magnet ring to be detected according to the magnet boundary image.
It can be understood that the magnet ring to be detected refers to a ring-shaped combined magnet in wireless charging, the magnet ring to be detected consists of a plurality of magnet blocks with the same size, after receiving a boundary instruction initiated by a user, the boundary of each magnet block in the magnet ring to be detected is required to be detected, and at the moment, an image of the magnet ring to be detected is acquired, and the image of the magnet ring to be detected is the image to be detected.
Step S20: and determining a boundary conversion image according to the image center of the image to be detected and the preset magnet size.
It should be noted that, the image center refers to the center position of the image to be detected, and the center of the image to be detected is positioned by the NCC (Normalized cross correlation, normalized cross-correlation) model, so as to determine the image center of the image to be detected, where the image center is also the center of the magnet ring to be detected.
The preset magnet size refers to the width of the magnet in the longitudinal direction of each magnet block in the magnet ring to be detected. The boundary conversion image refers to a rectangular image obtained by straightening an annular region containing a magnet ring to be detected.
It can be understood that after the image center of the image to be detected and the preset magnet size, an annular area containing the magnet ring to be detected and reserved with a preset area can be determined in the image to be detected, the magnet ring to be detected is divided from any position of the magnet ring to be detected, and the magnet ring to be detected is straightened and then subjected to polar coordinate conversion, so that a rectangular image of the area is obtained.
In a specific implementation, in order to obtain an accurate boundary conversion image, further, the determining the boundary conversion image according to the image center of the image to be detected and the preset magnet size includes: calculating the initial edge position of the magnet ring to be detected according to the image center of the image to be detected; determining a target edge according to the initial edge position and the preset magnet size; determining a target magnet ring image according to the target edge and the image to be detected; and performing polar coordinate conversion on the target magnet ring image to obtain a boundary conversion image.
After the image center of the image to be detected is determined, the positions of the inner edge and the outer edge of the magnet ring to be detected can be calculated according to the image center, the positions of the inner edge and the outer edge are initial edge positions, an inner edge caliper is used as an inner edge caliper according to the positions of the inner edge in the initial edge positions, and an outer edge caliper is used as an outer edge caliper according to the positions of the inner edge and the outer edge in the initial edge positions when the inner edge caliper fails, so that the accurate outer edge is determined.
It will be appreciated that after the exact inner or outer edge is determined, the other edge of the magnet ring to be inspected can be calculated based on the predetermined magnet size. For example, after finding the exact inner edge according to the inner edge caliper, the outer edge of the magnet ring to be detected may be calculated according to the magnet width in the preset magnet size, and the target edge includes the inner edge and the outer edge of the magnet ring to be detected.
In a specific implementation, after determining the edge of the target, determining the area of the magnet ring to be detected in the image to be detected, determining the annular area which contains the magnet ring to be detected and is reserved with the preset area in the image to be detected according to the preset area and the area of the magnet to be detected, and obtaining the image corresponding to the annular area which contains the magnet ring to be detected and is reserved with the preset area in the image to be detected as the image of the target magnet ring.
After determining the target magnet ring image, dividing the magnet ring to be detected from any position of the magnet ring to be detected in the target magnet ring image, straightening the magnet ring to be detected, and performing polar coordinate conversion to obtain a corresponding rectangular image, wherein the rectangular image is the boundary conversion image. Therefore, the annular region where the magnet ring to be detected is located can be accurately obtained, the upper boundary and the lower boundary of the magnet ring to be detected are kept as straight as possible after the magnet ring to be detected is straightened, meanwhile, the region which contains the magnet ring to be detected and is reserved with the preset area is straightened, the boundary extraction of each magnet block is more facilitated, when the accurate and complete outline is determined according to four sides of the arc region, the calculation needed to be carried out is too complex, and after polar coordinates are converted into rectangular regions, a parallelogram region can be obtained only by fitting four straight lines. As shown in fig. 3, the target magnet ring image is a, the boundary conversion image is B, a is the inner edge of the target edges of the magnet ring to be detected, and B is the outer edge of the target edges of the magnet ring to be detected.
Step S30: and carrying out region division on the boundary conversion image, and determining the whole boundary of the magnet ring to be detected.
The image corresponding to the upper region in the boundary conversion image includes the upper boundary of each magnet block in the magnet ring to be detected, the image corresponding to the middle region includes a part of the longitudinal boundary of each magnet block in the magnet ring to be detected, and the image corresponding to the lower region includes the lower boundary of each magnet block in the magnet ring to be detected.
It can be understood that the upper boundary, the lower boundary and the longitudinal boundary of each magnet block in the magnet ring to be detected are respectively determined based on the divided boundary conversion images, and the upper boundary, the lower boundary and the longitudinal boundary of each magnet block in the magnet ring to be detected are the whole boundary of the magnet ring to be detected.
Step S40: and determining a magnet boundary image of the magnet ring to be detected according to the integral boundary and the boundary conversion image.
After the whole boundary is determined, the accurate areas of the magnet blocks in the magnet ring to be detected are made in the boundary conversion image, after the accurate areas of the magnet blocks in the boundary conversion image are obtained, whether the area numbers of the magnet blocks are the same as the magnet blocks in the magnet ring to be detected or not is determined, if so, the reverse polar coordinate conversion is carried out on the boundary conversion image, so that the original image of the magnet ring to be detected is mapped back, the original image is restored into an arc shape, the boundary of the magnet blocks in the magnet ring to be detected in the original image is marked clearly, and the original image of the magnet ring to be detected is the magnet boundary image.
Step S50: and finishing boundary detection of the magnet ring to be detected according to the magnet boundary image.
The boundary detection of the magnet ring to be detected is determined to be completed according to the magnet boundary image.
It can be understood that, according to the boundary detection method of the wireless charging magnet in the embodiment, the length dimension of the magnet in the magnet ring to be detected can be measured; meanwhile, whether the magnet blocks in the magnet ring to be detected deviate or not can be judged, and the specific process is as follows: fitting the upper boundary or the lower boundary of each magnet block in the magnet ring to be detected into a straight line, thereby obtaining a boundary datum line, measuring the upper boundary or the lower boundary of the target of each magnet block, calculating the distance between the upper boundary or the lower boundary of the target of each magnet block and the boundary datum line, and indicating that the magnet block is deviated when the distance exceeds a threshold value; the method can be used for distinguishing scratches on the package and scratches on the magnet in AI appearance inspection, and in AI appearance inspection, because the scratches or fracture of the magnet are quite similar to the imaging effect of the scratches on the outer packaging film, the detection is easy to cause, by the algorithm, a relatively accurate magnet area can be obtained, and by carrying out the operation of the defects and the magnet area, the defects penetrating through the magnet area can be judged as the scratches on the outer package, and the detection rate can be greatly reduced.
In the embodiment, when a boundary detection task of a wireless charging magnet is received, an image training set is obtained; model training is carried out according to the image training set, and an initial segmentation model is obtained; determining a target training set in the image training set according to the initial segmentation model; updating and training according to the image training set, the target training set and the initial segmentation model to obtain a target segmentation model; and finishing the boundary detection task of the wireless charging magnet according to the target segmentation model. By the method, when the initial segmentation model does not meet the online requirement, the target training set is determined in the image training set, and the initial segmentation model is updated and trained based on the target training set and the image training set, so that the target segmentation model which meets the online requirement and has better segmentation performance is obtained, the boundary detection task of the wireless charging magnet is completed based on the target segmentation model, and the segmentation precision of the boundary detection task of the wireless charging magnet is improved.
Referring to fig. 4, fig. 4 is a flowchart of a second embodiment of a boundary detection method for a wireless charging magnet according to the present invention.
Based on the first embodiment, the step S30 in the method for detecting a boundary of a wireless charging magnet according to the present embodiment includes:
Step S31: and carrying out region division on the boundary conversion image to obtain a first conversion image, a second conversion image and a third conversion image.
The image corresponding to the upper region in the boundary conversion image includes the upper boundary of each magnet block in the magnet ring to be detected, the image corresponding to the middle region includes a part of the longitudinal boundary of each magnet block in the magnet ring to be detected, and the image corresponding to the lower region includes the lower boundary of each magnet block in the magnet ring to be detected.
It can be understood that the image corresponding to the upper region is the first converted image, the image corresponding to the lower region is the second converted image, and the image corresponding to the middle region is the third converted image.
Step S32: and determining the transverse boundary of the magnet ring to be detected according to the first conversion image and the second conversion image.
The lateral boundaries refer to the upper boundary and the lower boundary of each magnet block in the magnet ring to be detected. And determining the transverse boundary of each magnet block in the magnet ring to be detected according to the first conversion image and the second conversion image.
It may be appreciated that, in order to obtain an accurate lateral boundary based on the first converted image and the second converted image, further, the determining the lateral boundary of the magnet ring to be detected according to the first converted image and the second converted image includes: traversing the first conversion image and the second conversion image, and determining a first boundary of each combined magnet in the magnet ring to be detected; determining a second boundary of each combined magnet in the magnet ring to be detected according to the regional center line of the third conversion image, the first boundary and a preset magnet size; and determining the transverse boundary of the magnet ring to be detected according to the first boundary and the second boundary.
In specific implementation, each combined magnet refers to a magnet block with the same size in a magnet ring to be detected, the first conversion image and the second conversion image are traversed, and the first boundary of each magnet block in each magnet ring to be detected is extracted, and the specific process is as follows: traversing the first conversion image, extracting the upper boundary of each magnet block in each magnet ring to be detected, traversing the second conversion image if the upper boundary of each magnet block in each magnet ring to be detected is not found in the first conversion image, extracting the lower boundary of each magnet block in each magnet ring to be detected, wherein the upper boundary or the lower boundary of each magnet block found is the first boundary of each magnet block.
If the first boundary is the upper boundary of each magnet block, making a rectangle upward according to the regional center line until reaching the upper boundary, and translating the upper boundary of each magnet block downward according to the preset magnet size, thereby obtaining the lower boundary of each magnet block, wherein the lower boundary is the second boundary of each magnet block; if the first boundary is the lower boundary of each magnet block, making a rectangle downwards according to the central line of the region until reaching the lower boundary, and upwards translating the lower boundary of each magnet according to the preset magnet size, thereby obtaining the upper boundary of each magnet block, wherein the upper boundary is the second boundary of each magnet block.
Step S33: and determining the longitudinal boundary of the magnet ring to be detected according to the third conversion image.
It should be noted that, the longitudinal boundary of the magnet ring to be detected, that is, the longitudinal boundary of each magnet block in the magnet ring to be detected, may be used to determine the longitudinal spacing line between each magnet block, and after the boundary conversion image is divided into regions, the longitudinal boundary of each magnet block may be determined according to the third conversion image.
It may be appreciated that, in order to determine an accurate longitudinal boundary according to the third conversion image, further, the determining a longitudinal boundary of the magnet ring to be detected according to the third conversion image includes: determining a region midline from the third transformed image; extracting a bright contour from the third converted image according to the regional center line to obtain a first contour line; fitting according to the first contour line to obtain a second contour line; and screening the second contour line according to a preset direction and a preset magnet size, and determining the longitudinal boundary of the magnet ring to be detected.
In a specific implementation, the region center line refers to the center line of the third conversion image, so that in order to accurately detect the accuracy to the sub-pixel, when the accuracy of the detection accuracy is reduced due to the imaging problem, the accuracy of the detection accuracy can still be ensured to be within an acceptable range, a bright contour is extracted from the third conversion image according to the region center line, all sub-pixel contour lines of a magnet ring to be detected in the third conversion image are obtained, all sub-pixel contour lines are decomposed into straight lines, circular arcs and ellipses, and straight lines in all sub-pixel contour lines in the magnet ring to be detected are used as first contour lines.
The fitting is performed on the first contour line, adjacent straight lines in the first contour line are fitted, the length of the longitudinal boundary is ensured, and the fitted straight lines are the second contour line. The preset direction refers to a direction perpendicular to the horizontal direction, and in this embodiment refers to the longitudinal direction.
It may be appreciated that the screening of the second contour line according to the preset direction and the preset magnet size, so as to determine the longitudinal boundary of each magnet block in the magnet ring to be detected, in this embodiment, in order to obtain an accurate longitudinal boundary, further, the screening of the second contour line according to the preset direction and the preset magnet size, so as to determine the longitudinal boundary of the magnet ring to be detected includes: filtering the second contour line according to the preset direction and the preset magnet size to obtain a third contour line; determining the number of combined magnets according to the magnet ring to be detected; determining a target screening contour number according to the number of the combined magnets; when the number of the third contour lines is larger than the target screening contour number, screening the third contour lines according to the equivalent radius of the third contour lines; and determining the longitudinal boundary of the magnet ring to be detected according to the screening result of the third contour line.
In a specific implementation, the second contour line is screened according to the preset direction and the preset magnet size, so that a third contour line with the length reaching the preset magnet size in the second contour line and the contour line direction being the preset direction is obtained.
It should be noted that, the number of combined magnets refers to the number of magnet blocks in the magnet ring to be detected, and the number of magnet blocks in the magnet ring to be detected is determined according to the magnet ring to be detected, so as to obtain the number of combined magnets, the target screening contour number refers to twice the number of combined magnets, and when the number of third contour lines is greater than the target screening contour number, the small radius of the equivalent ellipse of the third contour line is obtained, and the small radius of the equivalent ellipse is the equivalent radius of the third contour line. And screening the third contour line according to the equivalent radius of the third contour line, and removing the contour line which is not straight in the third contour line, so as to obtain a screening result of the third contour line, and determining the longitudinal boundary of the magnet ring to be detected according to the screening result of the third contour line.
It can be appreciated that, in order to obtain an accurate longitudinal boundary based on the screening result of the third contour line, further, the determining the longitudinal boundary of the magnet ring to be detected according to the screening result of the third contour line includes: determining a fourth profile according to the screening result of the third profile; determining a magnet gap region according to the fourth contour line and the region center line; determining a residual area on the pixel area according to the pixel area of the central line of the area and the magnet gap area; determining the side boundary of the magnet ring to be detected according to the residual area; and determining the longitudinal boundary of the magnet ring to be detected according to the fourth contour line and the side boundary.
In a specific implementation, according to a screening result of the third contour line, filtering the contour line which is not straight in the third contour line to obtain a contour line which is straight in the third contour line, wherein the contour line which is straight in the third contour line is a fourth contour line, and the fourth contour line is a longitudinal boundary of each magnet ring in the magnet ring to be detected, and the longitudinal boundary of the left side of the leftmost magnet block and the longitudinal boundary of the right side of the rightmost magnet block of the magnet ring to be detected are not included.
The fourth contour line is sequenced to make the fourth contour line correspond to each magnet block in the magnet ring to be detected, the intersection point of the regional center line and the fourth contour line is obtained, the adjacent points with the distance between the focuses within the preset gap width range of each magnet block are connected into a line to obtain gap lines, each gap line is converted into a region, namely, one line with the width of a single pixel is a region, so that the gap region between each magnet block is obtained, and the gap region between each magnet block is the magnet gap region.
It can be understood that the line of the area is converted into the area, so as to obtain a pixel area corresponding to the area center line, the line area representing the transverse width of each magnet block can be obtained by subtracting the magnet gap area from the pixel area, and the extra extremely short line area possibly caused by the excessive gap contour is screened out, so that the relatively accurate magnet block area and the relatively accurate magnet gap area are finally obtained.
In a specific implementation, considering the situation that the magnet gap is too small to cause only one contour line, the contours without adjacent contour lines are screened out, and slightly expand by one or two pixels, a designated magnet gap area is obtained under the condition that the measurement of a magnet ring to be detected is not seriously influenced, and the newly obtained magnet gap area is subtracted by the pixel area, so that the magnet block area with the correct number can be obtained.
It should be noted that, considering that there is no magnet gap at two ends of the magnet ring to be detected, the longitudinal boundary extraction of the two ends of the magnet ring to be detected may be not obvious, so as to cause extraction omission, firstly, rectangular closed operation is performed on the region where the magnet ring to be detected is located, where the third conversion image is obtained according to blob analysis, so that the region where the magnet ring to be detected is located is more complete, the influence of the magnet gap region is eliminated, the pixel region is used to subtract the magnet gap region, so as to obtain a remaining region except the processed magnet gap region on the pixel region, if the width of the remaining region is greater than the transverse width of the magnet block to be measured, in the remaining region of the pixel region, the longitudinal boundary corresponding to the contour line of the magnet block at the two ends of the magnet ring to be detected in the fourth contour line is used as a caliper, so as to obtain an accurate rectangular region, and the left and right edges of the rectangular region are the left longitudinal boundary of the magnet block at the leftmost side of the magnet ring to be detected.
It will be appreciated that the side boundaries and fourth profile defined in the third transformed image define the longitudinal boundaries of the magnet blocks in the magnet ring to be inspected. As shown in fig. 5, a to j are fourth profiles, m and n are side boundaries, a is a region where each magnet block is located, and B is a magnet gap region.
Step S34: and determining the whole boundary of the magnet ring to be detected according to the transverse boundary and the longitudinal boundary.
After the transverse boundary and the longitudinal boundary of each magnet block of the magnet ring to be detected are obtained, the whole boundary of the magnet ring to be detected can be determined.
In this embodiment, the boundary conversion image is divided into regions to obtain a first conversion image, a second conversion image and a third conversion image; determining the transverse boundary of the magnet ring to be detected according to the first conversion image and the second conversion image; determining the longitudinal boundary of the magnet ring to be detected according to the third conversion image; and determining the whole boundary of the magnet ring to be detected according to the transverse boundary and the longitudinal boundary. By the method, the boundary conversion image is subjected to region division, and the transverse boundary and the longitudinal boundary of each magnet block are respectively determined based on the directions after region division, so that the boundary detection precision and the boundary detection efficiency are ensured.
In addition, referring to fig. 6, an embodiment of the present invention further provides a wireless-charging-magnet boundary detection device, where the wireless-charging-magnet boundary detection device includes:
the acquisition module 10 is used for acquiring the image to be detected of the magnet ring to be detected.
And the determining module 20 is used for determining a boundary conversion image according to the image center of the image to be detected and the preset magnet size.
The dividing module 30 is configured to divide the boundary conversion image into regions, and determine an overall boundary of the magnet ring to be detected.
The determining module 20 is configured to determine a magnet boundary image of the magnet ring to be detected according to the overall boundary and the boundary conversion image.
And a finishing module 40, configured to finish the boundary detection of the magnet ring to be detected according to the magnet boundary image.
The embodiment obtains the image to be detected of the magnet ring to be detected; determining a boundary conversion image according to the image center of the image to be detected and the preset magnet size; dividing the boundary conversion image into areas, and determining the whole boundary of the magnet ring to be detected; determining a magnet boundary image of the magnet ring to be detected according to the integral boundary and the boundary conversion image; and finishing boundary detection of the magnet ring to be detected according to the magnet boundary image. According to the method, the boundary conversion image is determined based on the image center of the image to be detected and the preset magnet size, and the whole boundary of the magnet ring to be detected is determined through the boundary conversion image, so that the calculation difficulty of the whole boundary is reduced, the magnet boundary image of the magnet ring to be detected is determined based on the whole boundary and the boundary conversion image, the boundary of each single magnet in the magnet ring to be detected can be determined based on the magnet boundary image, the boundary detection of the magnet ring to be detected is completed, and the accuracy of the wireless charging of the magnet ring to be detected in the boundary detection process is guaranteed.
In an embodiment, the determining module 20 is further configured to calculate an initial edge position of the magnet ring to be detected according to an image center of the image to be detected;
determining a target edge according to the initial edge position and the preset magnet size;
determining a target magnet ring image according to the target edge and the image to be detected;
and performing polar coordinate conversion on the target magnet ring image to obtain a boundary conversion image.
In an embodiment, the dividing module 30 is further configured to perform region division on the boundary conversion image to obtain a first conversion image, a second conversion image and a third conversion image;
determining the transverse boundary of the magnet ring to be detected according to the first conversion image and the second conversion image;
determining the longitudinal boundary of the magnet ring to be detected according to the third conversion image;
and determining the whole boundary of the magnet ring to be detected according to the transverse boundary and the longitudinal boundary.
In an embodiment, the dividing module 30 is further configured to determine a region centerline according to the third transformed image;
extracting a bright contour from the third converted image according to the regional center line to obtain a first contour line;
Fitting according to the first contour line to obtain a second contour line;
and screening the second contour line according to a preset direction and a preset magnet size, and determining the longitudinal boundary of the magnet ring to be detected.
In an embodiment, the dividing module 30 is further configured to filter the second contour line according to the preset direction and the preset magnet size to obtain a third contour line;
determining the number of combined magnets according to the magnet ring to be detected;
determining a target screening contour number according to the number of the combined magnets;
when the number of the third contour lines is larger than the target screening contour number, screening the third contour lines according to the equivalent radius of the third contour lines;
and determining the longitudinal boundary of the magnet ring to be detected according to the screening result of the third contour line.
In an embodiment, the dividing module 30 is further configured to determine a fourth profile according to the screening result of the third profile;
determining a magnet gap region according to the fourth contour line and the region center line;
determining a residual area on the pixel area according to the pixel area of the central line of the area and the magnet gap area;
determining the side boundary of the magnet ring to be detected according to the residual area;
And determining the longitudinal boundary of the magnet ring to be detected according to the fourth contour line and the side boundary.
In an embodiment, the dividing module 30 is further configured to traverse the first converted image and the second converted image to determine a first boundary of each combined magnet in the magnet ring to be detected;
determining a second boundary of each combined magnet in the magnet ring to be detected according to the regional center line of the third conversion image, the first boundary and a preset magnet size;
and determining the transverse boundary of the magnet ring to be detected according to the first boundary and the second boundary.
Because the device adopts all the technical schemes of all the embodiments, the device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted here.
In addition, the embodiment of the invention also provides a storage medium, wherein the storage medium stores a wireless magnet-filled boundary detection program, and the wireless magnet-filled boundary detection program realizes the steps of the wireless magnet-filled boundary detection method when being executed by a processor.
Because the storage medium adopts all the technical schemes of all the embodiments, the storage medium has at least all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted here.
It should be noted that the above-described working procedure is merely illustrative, and does not limit the scope of the present invention, and in practical application, a person skilled in the art may select part or all of them according to actual needs to achieve the purpose of the embodiment, which is not limited herein.
In addition, technical details not described in detail in the present embodiment may refer to the boundary detection method of the wireless charging magnet provided in any embodiment of the present invention, which is not described herein.
Furthermore, it should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. Read Only Memory)/RAM, magnetic disk, optical disk) and including several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (9)
1. The boundary detection method of the wireless magnet comprises the following steps:
Acquiring an image to be detected of a magnet ring to be detected;
determining a boundary conversion image according to the image center of the image to be detected and a preset magnet size, wherein the image center of the image to be detected refers to the center of the magnet ring to be detected, the preset magnet size refers to the magnet width of each magnet block in the magnet ring to be detected in the longitudinal direction, and the boundary conversion image refers to a rectangular image obtained by straightening an annular area containing the magnet ring to be detected in the image to be detected;
dividing the boundary conversion image into areas, and determining the whole boundary of the magnet ring to be detected;
determining a magnet boundary image of the magnet ring to be detected according to the integral boundary and the boundary conversion image, specifically determining whether the area number of each magnet block is the same as the magnet block number in the magnet ring to be detected according to the accurate area of each magnet block in the magnet ring to be detected in the boundary conversion image, and performing inverse polar coordinate conversion on the boundary conversion image when the area number of each magnet block is the same as the magnet block number in the magnet ring to be detected to obtain an original image of the magnet ring to be detected, wherein the boundary of each magnet block in the magnet ring to be detected in the original image is marked, and the original image is the magnet boundary image;
Finishing boundary detection of the magnet ring to be detected according to the magnet boundary image;
the method for determining the whole boundary of the magnet ring to be detected includes the steps of:
dividing the boundary conversion image into areas to obtain a first conversion image, a second conversion image and a third conversion image, wherein the first conversion image is an image corresponding to the upper area of the boundary conversion image, the first conversion image comprises the upper boundary of each magnet block in the magnet ring to be detected, the second conversion image is an image corresponding to the lower area of the boundary conversion image, the second conversion image comprises the lower boundary of each magnet block in the magnet ring to be detected, the third conversion image is an image corresponding to the middle area of the boundary conversion image, and the third conversion image comprises the longitudinal boundary of each magnet block in the magnet ring to be detected;
determining the transverse boundary of the magnet ring to be detected according to the first conversion image and the second conversion image;
determining the longitudinal boundary of the magnet ring to be detected according to the third conversion image;
and determining the whole boundary of the magnet ring to be detected according to the transverse boundary and the longitudinal boundary.
2. The method for detecting a boundary of a wireless charging magnet according to claim 1, wherein the determining a boundary conversion image according to an image center of the image to be detected and a preset magnet size comprises:
calculating the initial edge position of the magnet ring to be detected according to the image center of the image to be detected;
determining a target edge according to the initial edge position and the preset magnet size;
determining a target magnet ring image according to the target edge and the image to be detected;
and performing polar coordinate conversion on the target magnet ring image to obtain a boundary conversion image.
3. The method of claim 1, wherein determining a longitudinal boundary of the magnet ring to be detected from the third converted image comprises:
determining a region midline from the third transformed image;
extracting a bright contour from the third converted image according to the regional center line to obtain a first contour line;
fitting according to the first contour line to obtain a second contour line;
and screening the second contour line according to a preset direction and a preset magnet size, and determining the longitudinal boundary of the magnet ring to be detected.
4. The method for detecting a boundary of a wireless magnet according to claim 3, wherein the step of screening the second contour line according to a preset direction and a preset magnet size to determine a longitudinal boundary of the magnet ring to be detected comprises:
filtering the second contour line according to the preset direction and the preset magnet size to obtain a third contour line;
determining the number of combined magnets according to the magnet ring to be detected;
determining a target screening contour number according to the number of the combined magnets;
when the number of the third contour lines is larger than the target screening contour number, screening the third contour lines according to the equivalent radius of the third contour lines;
and determining the longitudinal boundary of the magnet ring to be detected according to the screening result of the third contour line.
5. The method for detecting a boundary of a wireless magnet according to claim 4, wherein determining a longitudinal boundary of the magnet ring to be detected according to the screening result of the third contour line comprises:
determining a fourth profile according to the screening result of the third profile;
determining a magnet gap region according to the fourth contour line and the region center line;
determining a residual area on the pixel area according to the pixel area of the central line of the area and the magnet gap area;
Determining the side boundary of the magnet ring to be detected according to the residual area;
and determining the longitudinal boundary of the magnet ring to be detected according to the fourth contour line and the side boundary.
6. The method of claim 1, wherein determining the lateral boundary of the magnet ring to be detected from the first converted image and the second converted image comprises:
traversing the first conversion image and the second conversion image, and determining a first boundary of each combined magnet in the magnet ring to be detected;
determining a second boundary of each combined magnet in the magnet ring to be detected according to the regional center line of the third conversion image, the first boundary and a preset magnet size;
and determining the transverse boundary of the magnet ring to be detected according to the first boundary and the second boundary.
7. A wireless-magnet-filled boundary detection device, characterized in that the wireless-magnet-filled boundary detection device comprises:
the acquisition module is used for acquiring an image to be detected of the magnet ring to be detected;
the determining module is used for determining a boundary conversion image according to the image center of the image to be detected and a preset magnet size, wherein the image center of the image to be detected refers to the center of the magnet ring to be detected, the preset magnet size refers to the width of each magnet block in the magnet ring to be detected in the longitudinal direction, and the boundary conversion image refers to a rectangular image obtained by straightening an annular area containing the magnet ring to be detected in the image to be detected;
The dividing module is used for dividing the boundary conversion image into areas and determining the whole boundary of the magnet ring to be detected;
the determining module is configured to determine a magnet boundary image of the magnet ring to be detected according to the overall boundary and the boundary conversion image, specifically determine whether the area number of each magnet block is the same as the magnet number of each magnet block in the magnet ring to be detected according to the accurate area of each magnet block in the magnet ring to be detected in the boundary conversion image, and perform inverse polar coordinate conversion on the boundary conversion image to obtain an original image of the magnet ring to be detected when the area number of each magnet block is the same as the magnet number of the magnet blocks in the magnet ring to be detected, where the boundary of each magnet block in the magnet ring to be detected in the original image is marked, and the original image is the magnet boundary image;
the completion module is used for completing the boundary detection of the magnet ring to be detected according to the magnet boundary image;
the determining module is further configured to perform region division on the boundary conversion image to obtain a first conversion image, a second conversion image and a third conversion image, where the first conversion image is an image corresponding to an upper region of the boundary conversion image, the first conversion image includes an upper boundary of each magnet block in the magnet ring to be detected, the second conversion image is an image corresponding to a lower region of the boundary conversion image, the second conversion image includes a lower boundary of each magnet block in the magnet ring to be detected, the third conversion image is an image corresponding to a middle region of the boundary conversion image, and the third conversion image includes a longitudinal boundary of each magnet block in the magnet ring to be detected;
Determining the transverse boundary of the magnet ring to be detected according to the first conversion image and the second conversion image;
determining the longitudinal boundary of the magnet ring to be detected according to the third conversion image;
and determining the whole boundary of the magnet ring to be detected according to the transverse boundary and the longitudinal boundary.
8. A wireless-magnet-filled boundary detection apparatus, characterized by comprising: a memory, a processor, and a wireless-powered boundary detection program stored on the memory and operable on the processor, the wireless-powered boundary detection program configured to implement the wireless-powered boundary detection method of any one of claims 1 to 6.
9. A storage medium, wherein a wireless-powered boundary detection program is stored on the storage medium, and the wireless-powered boundary detection program, when executed by a processor, implements the wireless-powered boundary detection method according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310023655.XA CN115830043B (en) | 2023-01-09 | 2023-01-09 | Boundary detection method, device, equipment and storage medium for wireless charging magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310023655.XA CN115830043B (en) | 2023-01-09 | 2023-01-09 | Boundary detection method, device, equipment and storage medium for wireless charging magnet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115830043A CN115830043A (en) | 2023-03-21 |
| CN115830043B true CN115830043B (en) | 2023-05-26 |
Family
ID=85520387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310023655.XA Active CN115830043B (en) | 2023-01-09 | 2023-01-09 | Boundary detection method, device, equipment and storage medium for wireless charging magnet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115830043B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111709912A (en) * | 2020-05-18 | 2020-09-25 | 北京配天技术有限公司 | Arc edge detection method and device and storage medium |
| CN113822890A (en) * | 2021-11-24 | 2021-12-21 | 中科慧远视觉技术(北京)有限公司 | Microcrack detection method, device and system and storage medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010095178A1 (en) * | 2009-02-23 | 2010-08-26 | 富士通株式会社 | Multicolor vector image processing device and method |
| CN109325930B (en) * | 2018-09-12 | 2021-09-28 | 苏州优纳科技有限公司 | Boundary defect detection method, device and detection equipment |
| CN113139943B (en) * | 2021-04-22 | 2022-08-12 | 苏州华兴源创科技股份有限公司 | Method and system for detecting appearance defects of open circular ring workpiece and computer storage medium |
| CN113344954A (en) * | 2021-05-06 | 2021-09-03 | 加特兰微电子科技(上海)有限公司 | Boundary detection method and device, computer equipment, storage medium and sensor |
| CN114241036A (en) * | 2021-12-15 | 2022-03-25 | 北京航空航天大学合肥创新研究院(北京航空航天大学合肥研究生院) | Method and device for determining transparent band boundary, electronic equipment and storage medium |
-
2023
- 2023-01-09 CN CN202310023655.XA patent/CN115830043B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111709912A (en) * | 2020-05-18 | 2020-09-25 | 北京配天技术有限公司 | Arc edge detection method and device and storage medium |
| CN113822890A (en) * | 2021-11-24 | 2021-12-21 | 中科慧远视觉技术(北京)有限公司 | Microcrack detection method, device and system and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115830043A (en) | 2023-03-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11551341B2 (en) | Method and device for automatically drawing structural cracks and precisely measuring widths thereof | |
| CN111028213B (en) | Image defect detection method, device, electronic equipment and storage medium | |
| TWI713366B (en) | Method and device for target sampling of images | |
| CN103207987B (en) | A kind of registration recognition methods of pointer instrument | |
| CN106920245B (en) | Boundary detection method and device | |
| CN111414934A (en) | Pointer type meter reading automatic identification method based on fast R-CNN and U-Net | |
| CN113688807A (en) | Self-adaptive defect detection method, device, recognition system and storage medium | |
| CN111161339B (en) | Distance measuring method, device, equipment and computer readable medium | |
| CN114627080B (en) | Vehicle stamping accessory defect detection method based on computer vision | |
| CN115937203B (en) | Visual detection method, device, equipment and medium based on template matching | |
| CN111899237A (en) | Scale precision measuring method, scale precision measuring device, computer equipment and storage medium | |
| CN114419045A (en) | Method, device and equipment for detecting defects of photoetching mask plate and readable storage medium | |
| CN112560584A (en) | Face detection method and device, storage medium and terminal | |
| CN108764343B (en) | Method for positioning tracking target frame in tracking algorithm | |
| CN112419225B (en) | SOP type chip detection method and system based on pin segmentation | |
| CN113160223A (en) | Contour determination method, contour determination device, detection device and storage medium | |
| CN116486126B (en) | Template determination method, device, equipment and storage medium | |
| CN116385440B (en) | Visual detection method for arc-shaped blade | |
| CN115830043B (en) | Boundary detection method, device, equipment and storage medium for wireless charging magnet | |
| CN109084721B (en) | Method and apparatus for determining a topographical parameter of a target structure in a semiconductor device | |
| CN107578001B (en) | Method and device for testing resolution of fingerprint acquisition equipment | |
| CN113554688B (en) | O-shaped sealing ring size measurement method based on monocular vision | |
| CN114862761A (en) | Power transformer liquid level detection method, device, equipment and storage medium | |
| CN114387219A (en) | Method, device, medium and equipment for detecting arteriovenous cross compression characteristics of eyeground | |
| CN109215068B (en) | Image magnification measuring method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |