CN113099065A - Handheld portable plant leaf rolling adsorption scanning device and scanning method thereof - Google Patents
Handheld portable plant leaf rolling adsorption scanning device and scanning method thereof Download PDFInfo
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- CN113099065A CN113099065A CN202110363734.6A CN202110363734A CN113099065A CN 113099065 A CN113099065 A CN 113099065A CN 202110363734 A CN202110363734 A CN 202110363734A CN 113099065 A CN113099065 A CN 113099065A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/28—Measuring arrangements characterised by the use of optical techniques for measuring areas
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/0035—User-machine interface; Control console
- H04N1/00405—Output means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00795—Reading arrangements
- H04N1/00827—Arrangements for reading an image from an unusual original, e.g. 3-dimensional objects
Abstract
The invention discloses a handheld portable plant leaf rolling adsorption scanning device and a scanning method thereof, wherein the handheld portable plant leaf rolling adsorption scanning device comprises a lower seat, an upper seat, a rolling shaft device, a portable scanner, glass fiber gridding cloth and a vacuum pneumatic valve; the lower seat is connected with the lower part of the upper seat, a gap is reserved between the lower seat and the upper seat, one side of the gap is a blade inlet, the other side of the gap is a blade outlet, the rolling shaft device comprises a plurality of rubber rollers, and blades can enter from the blade inlet and be sent out from the blade outlet under the rolling of the rubber rollers; an open slot is formed in the middle of the upper surface of the lower seat, glass fiber gridding cloth is arranged at the slot opening of the open slot, and a vacuum pneumatic valve is arranged at the bottom of the open slot; the middle part of the upper seat is provided with a through opening, the portable scanner is arranged on the opening, and the scanning area of the portable scanner comprises an area covered by glass fiber gridding cloth. The invention solves the problem of inclined deformation when the portable scanner dynamically scans the blade image by adding the glass fiber gridding cloth and the vacuum adsorption device.
Description
Technical Field
The invention belongs to the technical field of scanning devices, and particularly relates to a handheld portable rolling adsorption scanning device for plant leaves and a scanning method thereof.
Background
The shape and color of the leaves can reflect the health condition of the plants, so that the growth condition of the plants can be rapidly mastered by acquiring and analyzing the images of the plant leaves. The traditional image acquisition modes mainly include digital photographing, flat panel scanning and portable scanning. The digital photographing is interfered by the external environment, so that the acquired blade image has a larger difference from the real situation; the imaging environment of the flat-plate scanner is most closed, so that the external interference can be effectively reduced, and the picture quality can be ensured, but the flat-plate scanner has the defects of large volume and difficult carrying, and is difficult to acquire images by using the flat-plate scanner particularly in field experiments; the portable scanner (pen scanner) can solve the carrying problem well and is used under the condition of being separated from a computer, but because the operation of the portable scanner needs manual sliding, the quality and the accuracy of an image can be greatly influenced, and the reliability of the image is reduced.
Disclosure of Invention
In order to solve the problems, the invention provides a handheld portable plant leaf rolling adsorption scanning device and a scanning method thereof.
The technical solution for achieving the above purpose is as follows:
a handheld portable plant leaf rolling adsorption scanning device comprises a lower seat, an upper seat, a rolling shaft device, a portable scanner, glass fiber gridding cloth and a vacuum pneumatic valve;
the lower seat is connected to the lower part of the upper seat, a gap is reserved between the lower seat and the upper seat, one side of the gap is a blade inlet, the other side of the gap is a blade outlet, the roller device comprises a rubber roller, and blades can enter from the blade inlet and can be sent out from the blade outlet under the rolling of the rubber roller;
an open slot is formed in the middle of the upper surface of the lower seat, the glass fiber gridding cloth is arranged at the notch of the open slot, and the vacuum pneumatic valve is arranged at the bottom of the open slot;
the middle part of the upper seat is provided with a through opening, the portable scanner is arranged on the opening, and the scanning area of the portable scanner at least comprises an area covered by the glass fiber gridding cloth.
The upper surface of the portable scanner is provided with a liquid crystal display screen and a control key, so that the basic characteristic parameters such as the leaf area, the perimeter and the like of the scanning blade can be displayed in real time, and a user can know the scanning effect in real time and conveniently process subsequent data. The control circuit board mainly comprises a CIS scanning module, an AD sampling module, a micro-processing module, an FPGA module and a WiFi module; wherein the liquid crystal display screen is electrically connected with the control key and the microprocessing module. And the data information processed by the micro-processing module is uploaded to the upper computer through the WiFi module.
Further, the roller device comprises four groups of rollers: the four groups of rolling shafts are respectively provided with a long rubber roller, wherein the first rolling shaft and the second rolling shaft are arranged on the lower seat, and the third rolling shaft and the fourth rolling shaft are arranged on the upper seat.
Furthermore, each group of rolling shafts comprises a long rubber roller, a rigid shaft and two roller buckles, and the outer end part of the long rubber roller is connected with one roller buckle respectively.
Further, a roller mounting part is respectively arranged on one side, close to the leaf inlet and the leaf outlet, of the upper plane of the lower seat and the lower plane of the upper seat, and a roller can be mounted in the roller mounting part and can roll in the roller mounting part.
Further, every roller bearing installation department includes the roller groove and is located the roller buckle at roller groove both ends, including roller location shelves in the roller buckle, the roller groove is used for holding long rubber roller and rigidity axle, and the roller buckle is used for holding the roller buckle can be right the roller buckle location.
Furthermore, a bearing is arranged on the roller buckle, an elastic deformation material or a multi-gear clamping piece is arranged in the roller positioning gear, and the roller buckle can be positioned under the extrusion of the elastic deformation material or on different gears of the multi-gear clamping piece after entering the roller positioning gear.
Furthermore, be provided with rigidity axle locating slot on the gyro wheel buckle, be elastic deformation material or many gears joint spare in the roller bearing location shelves, the gyro wheel buckle gets into can realize the location under the extrusion of elastic deformation material or on the different gears of many gears joint spare behind the roller bearing location shelves.
Furthermore, four corners of the upper plane of the lower seat and four corners of the lower plane of the upper seat are respectively provided with a support hole, and the four support columns are supported in the upper support hole and the lower support hole.
Further, the plant is rice.
According to the scanning method of the handheld portable plant leaf rolling adsorption scanning device, the method comprises the following steps:
the blade to be scanned is placed between the first roller and the third roller through the blade inlet, the switch of the scanner and the vacuum pneumatic valve is turned on, the first roller, the second roller, the third roller and the fourth roller are started to rotate, the blade is horizontally moved towards the blade outlet under the friction action of rubber rollers on the first roller and the third roller, when passing through the glass fiber mesh cloth, due to the adsorption action of the vacuum pneumatic valve, the blade is flatly adsorbed on the glass fiber mesh cloth, the scanner can better scan the blade image, the blade passes through the space between the upper seat and the lower seat, then the blade is sent out through the blade outlet under the friction action of the second roller and the fourth roller, and the scanner obtains complete image information of the blade after the scanning is completed.
Compared with the prior art, the invention has the beneficial effects that:
according to the rolling adsorption scanning device of the handheld portable scanner, the problem of inclined deformation of the portable scanner during dynamic scanning of the blade image is solved by adding the glass fiber gridding cloth and the vacuum adsorption device; a liquid crystal display screen is added to display relevant basic scanning information such as the perimeter and the area of the blade in real time, so that a user can know the scanning effect in real time and can conveniently perform subsequent data processing; the roller bearing device of two sets of parallels is increased to adopt the low coefficient of friction's of roll-motion moving mode to make blade scanning process more stable smooth-going, can understand whole blade image information of complete scanning, guarantee that the scanning result is accurate quick, do not destroyed and prevent to drag the ease effect to the protection blade surface moreover, roll and adsorb scanning device and handheld portable scanner can freely break away from, and overall operation is simple, convenient to carry.
Drawings
Fig. 1 is a schematic structural diagram of a lower seat portion of a rolling suction scanning device according to an embodiment of the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
Fig. 3 is a schematic structural diagram of a lower seat internal part of the rolling suction scanning device according to the embodiment of the present invention.
Fig. 4 is a schematic perspective view of a roller of the rolling suction scanning device according to the embodiment of the present invention.
Fig. 5 is a partially enlarged view of fig. 4.
Fig. 6 is a perspective view of an upper seat of a rolling suction scanner according to an embodiment of the present invention.
Fig. 7 is an exploded view of the structure of a rolling suction scanner according to an embodiment of the present invention.
Fig. 8 is a schematic view of a leaf of a rolling suction scanner according to an embodiment of the present invention.
Fig. 9 is a schematic diagram of the operation principle of the rolling suction scanning device according to the embodiment of the present invention.
Fig. 10 is a schematic view of the overall structure of a rolling suction scanning device according to an embodiment of the present invention.
Fig. 11 is a circuit diagram of a rolling suction scanning device according to an embodiment of the present invention.
Reference numbers in the figures: 1. a lower seat; 2. a first rolling shaft; 3. a second rolling shaft; 4. a third roller; 5. a fourth rolling shaft; 6. A screw hole; 7. a portable scanner; 8. a leaf inlet; 9. a blade; 10. glass fiber mesh cloth; 11. a roller groove; 12. a vacuum pneumatic valve; 13. a rigid shaft; 14. a rubber roller; 15. roller fastening; 16. an upper seat; 17. a support hole; 18. roller buckling; 19. a lower seat upper plane; 20. an upper seat lower plane; 21. an upper seat frame; 22. a support pillar; 23. a rigid shaft locating slot; 24. a roller positioning rail; 25. a liquid crystal screen; 26. a CIS sensor; 27. an AD sampling module; 28. an FPGA module; 29. a microprocessor module; 30. and a WiFi module.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to be understood, the following detailed description is combined with the embodiments of the invention: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a process are given, but the scope of the present invention is not limited to the following embodiments.
Referring to fig. 1-8, a handheld portable plant leaf rolling adsorption scanning device comprises a lower seat 1, an upper seat 16, a roller device, a portable scanner 7, a glass fiber mesh cloth 10 and a vacuum pneumatic valve 12;
the lower seat 1 is connected to the lower part of the upper seat 16, a gap is reserved between the lower seat and the upper seat, one side of the gap is a blade inlet, the other side of the gap is a blade outlet, the roller device comprises a rubber roller 14, and blades can enter from the blade inlet and be sent out from the blade outlet under the rolling of the rubber roller 14;
an open slot is formed in the middle of the upper surface of the lower seat 1, the glass fiber mesh cloth 10 is arranged at the notch of the open slot, and the vacuum pneumatic valve 12 is arranged at the bottom of the open slot;
the middle part of the upper seat 16 is provided with a through opening 21, the portable scanner 7 is arranged on the opening, and the scanning area of the portable scanner 7 at least comprises the area covered by the glass fiber gridding cloth 10.
Preferably, with reference to fig. 1, 3, 6 and 7, the roller device comprises four sets of rollers: the four groups of rollers are respectively provided with a long rubber roller 14, wherein the first roller 2 and the second roller 3 are arranged on the lower seat 1, and the third roller 4 and the fourth roller 5 are arranged on the upper seat 16.
Preferably, referring to fig. 4, each set of rollers includes a long rubber roller 14, a rigid shaft 13, and two roller buckles 15, and the outer ends of the two sides of the long rubber roller 14 are respectively connected with one roller buckle 15.
Preferably, roller mounting parts are respectively arranged on one sides of the upper plane 19 of the lower seat 1 and the lower plane 20 of the upper seat 16 close to the leaf inlet and the leaf outlet, and rollers can be mounted in the roller mounting parts and can roll in the roller mounting parts.
Preferably, with reference to fig. 1-2, each roller mounting portion includes a roller slot 11 and roller fasteners 18 located at two ends of the roller slot 11, each roller fastener 18 includes a roller positioning rail 24 therein, the roller slot 11 is used for accommodating a long rubber roller 14 and a rigid shaft 13, and the roller fasteners 18 are used for accommodating the roller fasteners 15 and positioning the roller fasteners 15.
Preferably, the roller buckle 15 is provided with a bearing, the roller positioning rail 24 is internally provided with an elastic deformation material or a multi-gear clamping member, and the roller buckle 15 can be positioned under the extrusion of the elastic deformation material or on different gears of the multi-gear clamping member after entering the roller positioning rail 24.
Preferably, with reference to fig. 4-5, a rigid shaft positioning groove 23 is formed in the roller buckle 15, an elastic deformation material or a multi-gear clamping piece is arranged in the roller positioning rail 24, the multi-gear clamping piece can be, for example, a clamping piece provided with a plurality of clamping positions, the positioning groove 23 includes a small diameter section, the small diameter section can be clamped into the clamping position to realize limitation, and the roller buckle 15 enters the roller positioning rail 24 and can realize positioning under the extrusion of the elastic deformation material or on different gears of the multi-gear clamping piece.
The roller buckle 15 on the roller is pressed downwards with force when passing through the roller buckle 18 so as to be prevented from separating from the roller groove 11 until the roller buckle 15 reaches a proper position and is limited by the roller positioning stop 24; the rubber roller 14 on the roller has good deformation recovery performance, so that the roller can adapt to the inlet and outlet of blades with different thicknesses.
The roller can rotate along the axis of the roller in the groove 11; the rubber roller 14 on the roller is arranged between the upper plane and the lower plane, the rubber roller 14 passes through the roller groove 11, the first roller 2 and the second roller 3 are exposed out of the upper half part, and the third roller 4 and the fourth roller 5 are exposed out of the lower half part; the roller buckle 15 enables the roller to rotate along the self axis in the roller groove 11 without separating from the roller groove; the cooperation of the roller positioning rail 24 and the rigid shaft positioning groove 23 can ensure that the rigid shaft does not axially move in the roller groove; the lower seat is placed in cooperation with the upper seat, and the upper seat and the lower seat are connected into a whole through the screw holes 6.
Preferably, the four corners of the upper plane 19 of the lower seat 1 and the four corners of the lower plane 20 of the upper seat 16 are respectively provided with a support hole 17, and four support columns 22 are supported in the upper and lower support holes to form a gap between the upper seat 16 and the lower seat 1.
Preferably, the plant is rice.
Preferably, in conjunction with fig. 11, the CIS sensor 26 is used to image-sense the scanned surface and generate analog image signals, which are converted into digital image signals by the AD sampling module 27 according to control signals from the data processing module, and the results are fed back to the data processing module. The data processing assembly comprises an FPGA module 28 and a microprocessing module 29. The microprocessing module comprises an STM32 single chip microcomputer, a burning program is recorded into the single chip microcomputer through a key 5 to process images obtained through scanning, and processed data are displayed on a display screen and are simultaneously transmitted to an upper computer through the WiFi module 30. The image is specifically processed as follows:
(1) and removing noise generated by the scanned image by using a Gaussian filter, and smoothing the image. The Gaussian filter is a linear smoothing filter, a template of the filter is obtained by dispersing a two-dimensional Gaussian function, sampling is carried out by taking the central position of the template as a coordinate origin, and the two-dimensional Gaussian function is as follows
Where (x, y) is the coordinates of any point in the image and σ is the standard deviation. In the example, the values of the elements in the gaussian template with the size of 3 × 3 and σ ═ 1.3 are calculated by using the formula, and if the values are in an integer form, normalization processing is required, and if the values are not in an integer form, the normalization processing can be directly used for filtering the image;
(2) and converting the filtered RGB image into a gray image, and then carrying out binarization processing on the gray image. The image graying needs R ═ G ═ B ═ gray, so the original image is separated into R, G, B three channels, and gray is the weighted average of RGB, i.e. gray ═ 0.299R +0.578G +0.114B, so a channel grayscale image is obtained; the method uses closed and connected boundaries to define non-overlapped areas to obtain an ideal binary image, namely all pixels with gray levels smaller than a threshold value are excluded, in the example, an Otsu threshold method is used to automatically find an optimal threshold value, and the principle is as follows: selecting a threshold value k from the gray level histogram of the image, the image can be divided into two groups with gray level values larger than k and smaller than k, and the variance of each group is calculated respectively to obtain the difference value (inter-class variance) between the two groups. Different k values correspond to different inter-class variances, the larger the inter-class variance is, the larger the difference between the target and the background in the image is, and the threshold corresponding to the maximum inter-class variance is selected as the required threshold;
(3) and performing morphological closing operation on the image, filling small holes and closing small cracks. And setting the shape of a convolution kernel as a rectangle, sliding the kernel from the upper left corner of the image until the whole image is slid, if all pixel values of the original image corresponding to the kernel are 1, keeping the original value of the central element, and otherwise, changing the central element into 0. The highlight area or the white area in the image is cleaner through sliding, and the area which can be broken in the previous treatment is also bonded;
(4) all the steps are image preprocessing, and after the processing is finished, a findContours algorithm is needed to search all continuous pixel sequences of the boundary of the image and store the continuous pixel sequences in contours vectors. The findContours algorithm determines the outer boundary and the hole boundary by line scanning, and when f (i, j-1) is 0 and f (i, j) is 1, f (i, j) is the starting point of the outer boundary, and f (i, j) > is 1 and f (i, j +1) is 0, f (i, j) is the starting point of the hole boundary; initially, setting the unique identifier NBD to 1, and each time a new boundary NBD +1 is found, if f (i, j) is 1 and f (i, j +1) is 0, making f (i, j) equal to-NBD, and at this time, the right boundary end point is reached, that is, a contour is found. Then drawing a rectangular frame around the outline, but an interference outline appears, so that the small interference outline is filtered by setting the condition of the rectangular frame, and the width of the rectangle is set to be less than 10 in the example; and drawing a minimum circumscribed rectangle and a minimum circumscribed circle of the minimum circumscribed rectangle after finding the correct outline, and calculating related parameters of the perimeter, the area, the rectangle degree and the like of the blade according to the length, the width and the area of the minimum circumscribed rectangle, wherein the perimeter is the total number of outermost edge pixels, the area is the total number of pixels, and the rectangle degree is the ratio of the area of the blade to the area of the circumscribed rectangle.
With reference to fig. 8-10, the scanning method of the handheld portable plant leaf rolling adsorption scanning device of the present invention comprises the following steps:
the blade 9 needing to be scanned is placed between the first roller 2 and the third roller 4 through the blade inlet 8, switches of the scanner 7 and the vacuum pneumatic valve 12 are turned on, the first roller 2, the second roller 3, the third roller 4 and the fourth roller 5 are started to enable the first roller to rotate, the blade 9 is horizontally moved towards the blade outlet under the action of friction force of a rubber roller 14 on the first roller 2 and the third roller 4, when the blade passes through the glass fiber gridding cloth 10, due to the adsorption effect of the vacuum pneumatic valve 12, the blade 9 is flatly adsorbed on the glass fiber gridding cloth 10, the scanner 7 can better scan blade images, the blade 9 passes through the space between the upper seat 16 and the lower seat 1, then the blade is sent out through the blade outlet under the action of the friction force of the second roller 3 and the fourth roller 5, and the scanner 7 can obtain complete image information of the blade 9 after scanning is completed.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A handheld portable plant leaf rolling adsorption scanning device is characterized by comprising a lower seat (1), an upper seat (16), a rolling shaft device, a portable scanner (7), glass fiber mesh cloth (10) and a vacuum pneumatic valve (12);
the lower seat (1) is connected to the lower part of the upper seat (16) and a gap is reserved between the lower seat and the upper seat, one side of the gap is a blade inlet, the other side of the gap is a blade outlet, the roller device comprises a rubber roller (14), and blades can enter from the blade inlet and be sent out from the blade outlet under the rolling of the rubber roller (14);
an open slot is formed in the middle of the upper surface of the lower seat (1), the glass fiber gridding cloth (10) is arranged at the slot opening of the open slot, and the vacuum pneumatic valve (12) is arranged at the bottom of the open slot;
the middle part of the upper seat (16) is provided with a through opening (21), the portable scanner (7) is arranged on the opening, and the scanning area of the portable scanner (7) at least comprises the area covered by the glass fiber mesh cloth (10).
2. The handheld portable plant foliage rolling suction scanning device of claim 1 wherein the roller means includes four sets of rollers: the four-roller bearing comprises a first roller (2), a second roller (3), a third roller (4) and a fourth roller (5), wherein a long rubber roller (14) is respectively arranged on the four groups of rollers, the first roller (2) and the second roller (3) are arranged on the lower seat (1), and the third roller (4) and the fourth roller (5) are arranged on the upper seat (16).
3. The rolling suction scanning device for the plant leaves in a hand-held portable way as claimed in claim 2, characterized in that each set of rollers comprises a long rubber roller (14), a rigid shaft (13) and two roller buckles (15), and the outer ends of the rubber rollers (14) are respectively connected with one roller buckle (15).
4. The rolling, absorbing and scanning device for the plant leaves as claimed in claim 3, wherein the upper plane (19) of the lower seat (1) and the lower plane (20) of the upper seat (16) are respectively provided with a roller mounting part at one side close to the leaf inlet and the leaf outlet, and a roller can be mounted in the roller mounting parts and can roll in the roller mounting parts.
5. The rolling suction scanning device for plant leaves as claimed in claim 4, wherein each roller mounting part comprises a roller groove (11) and roller buckles (18) at two ends of the roller groove (11), each roller buckle (18) comprises a roller positioning rail (24), the roller groove (11) is used for accommodating the long rubber roller (14) and the rigid shaft (13), and the roller buckles (18) are used for accommodating the roller buckles (15) and positioning the roller buckles (15).
6. The handheld portable plant blade rolling adsorption scanning device of claim 5, wherein a bearing is arranged on the roller buckle (15), an elastic deformation material or a multi-gear clamping piece is arranged in the roller positioning gear (24), and the roller buckle (15) can be positioned under the extrusion of the elastic deformation material or on different gears of the multi-gear clamping piece after entering the roller positioning gear (24).
7. The handheld portable plant blade rolling adsorption scanning device of claim 5, wherein a rigid shaft positioning slot (23) is arranged on the roller buckle (15), an elastic deformation material or a multi-gear clamping piece is arranged in the roller positioning gear (24), and the roller buckle (15) can be positioned under the extrusion of the elastic deformation material or on different gears of the multi-gear clamping piece after entering the roller positioning gear (24).
8. The rolling suction scanning device for plant leaves as claimed in any one of claims 5 to 7, wherein the four corners of the upper plane (19) of the lower base (1) and the four corners of the lower plane (20) of the upper base (16) are respectively provided with a support hole (17), and four support columns (22) are supported in the upper and lower support holes.
9. The scanning method of the handheld portable plant leaf rolling adsorption scanning device is characterized by comprising the following steps:
the blade (9) to be scanned is placed between the first rolling shaft (2) and the third rolling shaft (4) through the blade inlet (8), the switch of the scanner (7) and the vacuum pneumatic valve (12) is opened, the first rolling shaft (2), the second rolling shaft (3), the third rolling shaft (4) and the fourth rolling shaft (5) are started to enable the first rolling shaft (2), the second rolling shaft (3), the third rolling shaft (4) and the fourth rolling shaft (5) to rotate, the blade (9) is horizontally adsorbed on the glass fiber gridding cloth (10) under the friction force action of rubber rollers (14) on the first rolling shaft (2) and the third rolling shaft (4), the blade (9) can better scan the blade image due to the adsorption action of the vacuum pneumatic valve (12), the blade (9) is flatly adsorbed on the glass fiber gridding cloth (10), the scanner (7) can pass through the space between the upper seat (16) and the lower seat (1), and then the blade is sent out through the blade outlet under the friction force action of the second, after the scanning is finished, the scanner (7) acquires complete image information of the blade (9).
10. The scanning method of the handheld portable plant leaf rolling adsorption scanning device according to claim 9, wherein the process of scanning the leaf image by the scanner (7) comprises the following steps:
(1) removing noise generated by scanning the image by using a Gaussian filter, smoothing the image: the Gaussian filter is a linear smoothing filter, a template of the filter is obtained by dispersing a two-dimensional Gaussian function, sampling is carried out by taking the central position of the template as a coordinate origin, and the two-dimensional Gaussian function is as follows
Wherein (x, y) is the coordinate of any point in the image, σ is the standard deviation, each element value in a Gaussian template with the size of 3 × 3 and σ being 1.3 is calculated by using a two-dimensional Gaussian function formula, if the element value is in an integer form, normalization processing is carried out, and if not, the element value is directly used for filtering the image;
(2) converting the filtered RGB image into a gray level image, and then carrying out binarization processing on the gray level image: the image graying needs R ═ G ═ B ═ gray, so the original image is separated into R, G, B three channels, and gray is the weighted average of RGB, that is, gray ═ 0.299R +0.578G +0.114B, so a channel gray map is obtained; the method comprises the following steps of defining non-overlapped areas by using closed and connected boundaries to obtain an ideal binary image, namely excluding all pixels with gray levels smaller than a threshold value, and automatically searching for an optimal threshold value by using an Otsu threshold value method, wherein the principle of the Otsu threshold value method is as follows: selecting a threshold value k from a gray level histogram of the image, dividing the image into two groups of which the gray level is greater than k and less than k, respectively calculating the variance of each group and obtaining the inter-class variance between the two groups, wherein different k values correspond to different inter-class variances, the larger the inter-class variance is, the larger the difference between the target and the background in the image is, and the threshold value corresponding to the maximum inter-class variance is selected as the required threshold value;
(3) performing morphological closing operation on the image, filling small holes, and closing small cracks: setting the shape of a convolution kernel as a rectangle, sliding the kernel from the upper left corner of the image until the whole image is slid, if all pixel values of an original image corresponding to the kernel are 1, keeping the original value of a central element, otherwise, changing the central element into 0, and cleaning a highlight area or a white area in the image through sliding and bonding an area which is possibly disconnected in the previous processing;
(4) after image preprocessing is finished, searching all boundary continuous pixel sequences of the image through a findContours algorithm, and storing the boundary continuous pixel sequences in a contours vector, wherein the findContours algorithm determines an outer boundary and a hole boundary through line scanning, when f (i, j-1) is 0, f (i, j) is 1, f (i, j) is the starting point of the outer boundary, and when f (i, j) > is 1, and f (i, j +1) is 0, f (i, j) is the starting point of the hole boundary; setting a unique identifier NBD to be 1 initially, finding a new boundary NBD +1 every time, if f (i, j) is 1 and f (i, j +1) is 0, making f (i, j) be-NBD, reaching the right boundary end point at this time, namely finding a contour, drawing a rectangular frame around the contour, filtering out a small interference contour by setting the condition of the rectangular frame, setting a rectangle width with <10, drawing a minimum circumscribed rectangle and a minimum circumscribed circle after finding a correct contour, and calculating the perimeter, the area, the rectangle degree and the perimeter ratio of the blade according to the length, the width and the area of the minimum circumscribed rectangle, wherein the perimeter is the total number of outermost edge pixels, the area is the total number of pixels, the rectangle degree is the ratio of the area of the blade to the circumscribed rectangle area, and the perimeter ratio is the ratio of the perimeter to the length of the minimum circumscribed rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110363734.6A CN113099065B (en) | 2021-04-02 | 2021-04-02 | Handheld portable rolling adsorption scanning device for plant leaves and scanning method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110363734.6A CN113099065B (en) | 2021-04-02 | 2021-04-02 | Handheld portable rolling adsorption scanning device for plant leaves and scanning method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113099065A true CN113099065A (en) | 2021-07-09 |
| CN113099065B CN113099065B (en) | 2022-10-28 |
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Citations (3)
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| WO2014100856A1 (en) * | 2012-12-24 | 2014-07-03 | University Of Technology, Sydney | An image processing based method to estimate crop requirements for nutrient fertiliser |
| CN106813576A (en) * | 2017-01-24 | 2017-06-09 | 福建省林业科学研究院 | A kind of leaf area, girth, leaf measuring method long and leaf width |
| CN108965637A (en) * | 2018-08-01 | 2018-12-07 | 深圳市南硕明泰科技有限公司 | A kind of portable plant identification equipment |
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| WO2014100856A1 (en) * | 2012-12-24 | 2014-07-03 | University Of Technology, Sydney | An image processing based method to estimate crop requirements for nutrient fertiliser |
| CN106813576A (en) * | 2017-01-24 | 2017-06-09 | 福建省林业科学研究院 | A kind of leaf area, girth, leaf measuring method long and leaf width |
| CN108965637A (en) * | 2018-08-01 | 2018-12-07 | 深圳市南硕明泰科技有限公司 | A kind of portable plant identification equipment |
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| 吴志刚等: "基于FPGA和STM32的便携式叶面积仪的设计", 《电子技术》 * |
| 李震等: "植物多叶片图像目标识别和叶面积测量方法", 《华南农业大学学报》 * |
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