CN114943687A - Method for acquiring orthographic projection image of center of detected object, readable storage medium and terminal - Google Patents

Method for acquiring orthographic projection image of center of detected object, readable storage medium and terminal Download PDF

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CN114943687A
CN114943687A CN202210430981.8A CN202210430981A CN114943687A CN 114943687 A CN114943687 A CN 114943687A CN 202210430981 A CN202210430981 A CN 202210430981A CN 114943687 A CN114943687 A CN 114943687A
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detection
projection data
orthographic projection
acquiring
projection image
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肖悟升
张辉
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Iray Technology Co Ltd
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Iray Technology Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0004—Industrial image inspection
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T3/00—Geometric image transformations in the plane of the image
    • G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
    • G06T3/4023—Scaling of whole images or parts thereof, e.g. expanding or contracting based on decimating pixels or lines of pixels; based on inserting pixels or lines of pixels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T3/00—Geometric image transformations in the plane of the image
    • G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
    • G06T3/4038—Image mosaicing, e.g. composing plane images from plane sub-images
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/50—Depth or shape recovery
    • G06T7/55—Depth or shape recovery from multiple images
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10072—Tomographic images
    • G06T2207/10081—Computed x-ray tomography [CT]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/20—Special algorithmic details
    • G06T2207/20068—Projection on vertical or horizontal image axis
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

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  • General Physics & Mathematics (AREA)
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  • Computer Vision & Pattern Recognition (AREA)
  • Quality & Reliability (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

The invention provides a method for acquiring a center orthographic projection image of a detected object, which comprises the following steps: continuously scanning a plurality of detection targets in the detection object by utilizing a ray source to acquire cone beam projection data under a plurality of views covering the orthographic projection directions of all the detection targets; rearranging the data of the conical beam projection data to obtain parallel beam projection data under different angles; carrying out forward projection detection on each detection target based on each parallel beam projection data to obtain forward projection data of each detection target; a central orthographic projection image of the test object is acquired based on the orthographic projection data of each test object. The method solves the problems that the central orthographic projection image acquired by the existing method has cone angle effect and the orthographic projection of each detection target cannot be acquired simultaneously.

Description

Method for acquiring orthographic projection image of center of detected object, readable storage medium and terminal
Technical Field
The invention relates to the technical field of image processing, in particular to a method for acquiring an orthographic projection image of a center of a detected object, a readable storage medium and a terminal.
Background
When the lithium battery is charged, lithium ions need to enter the active particle position corresponding to the negative electrode from the positive electrode, if the negative electrode does not receive the position of the lithium ions, the lithium ions can be separated out on the surface of the negative electrode to form a dendrite, and the diaphragm is pierced to cause short circuit in the battery, so that the risk of thermal runaway of the battery is brought. The relative position information of the positive and negative pole pieces needs to be detected in the production process and after lamination is completed, the existing detection method can only realize detection by acquiring images through visible light during lamination of a laminating machine, however, the positions of the pole pieces may be displaced after lamination and isolation film wrapping, and therefore, overlapping detection needs to be carried out on the positive and negative pole pieces again after lamination and isolation film wrapping.
The current common method is to use X-ray imaging to obtain the pole piece information in the isolating membrane. However, because the number of layers of the battery is relatively large, the gap between the pole pieces is relatively small, and the used X-ray is cone-beam light, only a few layers of pole piece images which are opposite to the ray source can be clearly seen in the image obtained by the X-ray shooting lithium battery, and the pole pieces on two sides of the image are gradually overlapped, so that the true relative position information of the positive pole piece and the negative pole piece is difficult to obtain due to the influence when the vertex positions of the pole pieces are grabbed by using an algorithm.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a method, a readable storage medium and a terminal for acquiring a forward projection image of a center of an object under inspection, which are used to solve the problems that the forward projection image of the center of the object under inspection acquired by the prior art has a cone angle effect and cannot acquire forward projections of each object under inspection at the same time.
To achieve the above and other related objects, the present invention provides a method for acquiring a forward projection image of a center of an object under inspection, the method comprising:
continuously scanning a plurality of detection targets in the detection object by utilizing a ray source to acquire cone beam projection data under a plurality of views covering the orthographic projection directions of all the detection targets;
rearranging the data of the conical beam projection data to obtain parallel beam projection data under different angles;
carrying out forward projection detection on each detection target based on each parallel beam projection data to obtain forward projection data of each detection target;
a central orthographic projection image of the test object is acquired based on the orthographic projection data of each test object.
Optionally, the method for performing data rearrangement on each cone beam projection data comprises:
and splitting the light rays of the cone beam projection data under the multiple views, and arranging the cone beam projection data according to different angles to obtain the parallel beam projection data under different angles.
Optionally, a step of interpolation processing is further included when rearranging according to different angles.
Optionally, the method for performing forward projection detection on each detection target based on each parallel beam projection data includes: and selecting the maximum value from the parallel beam projection data of each detection target under different angles as the forward projection data of each detection target.
Optionally, the method of acquiring a central orthographic projection image of the detected object based on the orthographic projection data of each detection target includes:
acquiring an orthographic projection angle corresponding to the orthographic projection data of each detection target, and judging whether the orthographic projection angles of the detection targets are the same or not;
if the central forward projection image is the same as the central forward projection image, acquiring a central forward projection image of the detected object by using forward projection data from all detection targets under the same forward projection angle;
and if the detection targets are different, splicing the orthographic projection data of the detection targets to obtain spliced projection data, and acquiring a central orthographic projection image of the detected object by using the spliced projection data.
Optionally, the method for continuously scanning a plurality of detection targets in the detection object by using the radiation source includes:
in a computed tomography mode, the detection object is fixed, the radiation source rotates around the detection object at preset interval angles to realize continuous scanning of a plurality of detection targets of the detection object, or the radiation source is fixed, and the detection object rotates at preset interval angles to realize continuous scanning of a plurality of detection targets in the detection object.
Optionally, the method for continuously scanning a plurality of detection targets in the detection object by using the radiation source includes:
in a computed tomography mode, the detection object is fixed, and the ray source rotates around the detection object at preset interval angles, so that a plurality of detection targets in the detection object are continuously scanned; or the radiation source is fixed, and the detection objects move parallelly at preset intervals.
Optionally, the method for continuously scanning a plurality of detection targets in the detection object by using the radiation source includes:
in a computer tomography mode, the ray source moves parallelly at preset intervals to realize continuous scanning of a plurality of detection targets in the detection object.
Optionally, the detection target includes an electrode sheet.
The invention also provides a computer-readable storage medium on which a computer program is stored, which computer program, when being executed by a processor, is adapted to carry out the method of acquiring a forward projection image of a center of an object under examination as described above.
The invention also provides a terminal, which comprises a processor and a memory, wherein the memory is used for storing a computer program, and the processor is used for executing the computer program stored by the memory, so that the terminal executes the method for acquiring the orthographic projection image of the center of the detected object.
As described above, according to the method for acquiring the orthographic projection image of the center of the object to be detected, the readable storage medium and the terminal, the parallel beam projection data is obtained by rearranging the data of the cone beam projection data, the orthographic projection data is obtained by using the parallel beam projection data, and the center orthographic projection image is obtained according to the orthographic projection data, so that the cone angle effect of the image is effectively eliminated, and the quality of the image is improved; moreover, electrode slices with different inclination angles can be leveled to a surface which we want to observe by carrying out data rearrangement through cone beam projection data, and therefore the electrode slice detection efficiency is improved.
Drawings
FIG. 1 is a flow chart of a method for obtaining an orthographic projection image of a center of an object under inspection according to the present invention.
FIG. 2 shows a schematic diagram of a vertically aligned cylindrical array used for simulation experiments.
Fig. 3 shows a projection image of the cylindrical array shown in fig. 2.
Fig. 4 shows an orthographic projection of the cylindrical array of fig. 2.
Fig. 5 shows a central orthographic projection image obtained by performing interpolation processing on the orthographic projection data of the cylindrical array shown in fig. 2.
Fig. 6 shows a schematic diagram of a cylindrical array arranged with a periodic variation of tilt of-40 ° and 40 ° or so for the simulation experiment.
Fig. 7 shows a projection image of the cylindrical array shown in fig. 6.
Fig. 8 shows a projection image of the cylindrical array of fig. 6 from parallel projection data.
Fig. 9 shows a projected image with a forward projection direction of-40 deg. for the cylindrical array shown in fig. 6.
Fig. 10 shows a projection image with a forward projection direction of 40 deg. for the cylindrical array shown in fig. 6.
FIG. 11 is a central orthographic projection image of the cylindrical array of FIG. 6 after stitching together the orthographic projection data.
FIG. 12 is a schematic diagram showing the array of cylinders arranged at the same angular intervals for the simulation experiment.
Fig. 13 shows a projection image of the cylindrical array shown in fig. 12.
Fig. 14 shows a projection image obtained by interpolating the parallel projection data of the cylinder array shown in fig. 12.
Fig. 15 shows a central orthographic projection image of the cylindrical array of fig. 12.
Fig. 16 shows a schematic diagram of a cylinder array used in a simulation experiment, which is divided into 2 groups, one of which is uniformly arranged at an inclination angle of 30 ° and the other of which is uniformly arranged at an inclination angle of 70 °.
Fig. 17 shows a projection image of the cylindrical array shown in fig. 16.
Fig. 18 shows a central orthographic projection image of the cylindrical array of fig. 16.
Fig. 19 shows an electrode sheet array for a simulation experiment, which is divided into 2 groups, one of which is uniformly arranged at an inclination angle of 30 ° and the other of which is uniformly arranged at an inclination angle of 70 °.
Fig. 20 is a view showing a projected image of the electrode sheet array shown in fig. 19.
Fig. 21 shows the parallel projection data of the electrode sheet array and the projection image obtained after interpolation processing.
Fig. 22 is a view showing a center orthographic projection of the electrode sheet array shown in fig. 19.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 1 to 22. It should be noted that the drawings provided in the present embodiment are only schematic and illustrate the basic idea of the present invention, and although the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation, the form, quantity and proportion of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
As shown in fig. 1, the present embodiment provides a method for acquiring a forward projection image of the center of a detected object, the method includes step 1), step 2), step 3), and step 4).
Step 1) continuously scanning a plurality of detection targets in a detection object by utilizing a ray source so as to acquire cone beam projection data under a plurality of views covering the orthographic projection directions of all the detection targets.
Specifically, in an example, a method for continuously scanning a plurality of detection targets in a detection object by using a radiation source includes: in a Computed Tomography (CT) scanning mode, the detection object is fixed, and the ray source rotates around the detection object at preset interval angles, so that a plurality of detection targets in the detection object are continuously scanned; or the ray source is fixed, and the detection object rotates at preset interval angles, so that a plurality of detection targets in the detection object are continuously scanned. If the ray source rotates at a preset interval angle of 30 degrees, or the detection object rotates at an angle of 30 degrees, the purpose of continuously scanning a plurality of detection targets in the detection object is achieved, and 100 groups of cone beam projection data are acquired.
In the present example, in the CT scanning mode, the radiation source is moved from one side of the object to the other side by rotating around the object, so as to acquire cone beam projection data in a plurality of fields of view. When the cone beam projection data under a plurality of visual fields are acquired in the computer tomography mode (CT scanning mode), the acquired data are ensured to be continuous as much as possible, and the aim is to obtain parallel beam projection data with better precision after the cone beam projection data are subjected to data rearrangement so as to obtain a smoother central orthographic projection image; and the cone beam projection data acquired by the method can include the forward projection data of all detection targets, so that the quality of the finally obtained central forward projection image is ensured.
In practical application, when the cone beam projection data under multiple views are acquired in a CT scanning mode, if a certain detected target is tilted and the tilt angle is too large, the cone beam projection data under more views can be acquired by increasing the scanning angle (i.e. the angle of the radiation source rotating around the detected target), so as to ensure that the forward projection data of all the detected targets can be covered.
In another example, a method for continuously scanning a plurality of detection targets in a detection object by using a radiation source includes: in the CL mode, the radiation source moves in parallel at a preset distance interval to continuously scan a plurality of targets in the object to be detected, for example, the radiation source moves in parallel at a preset distance interval of every 0.5mm or the object to be detected moves at a preset distance interval of every 0.5mm, and the plurality of targets in the object to be detected are continuously scanned to acquire 100 sets of cone beam projection data.
In the present example, in the CL scan mode, the radiation source is translated from one side of the object under inspection to the other side of the object under inspection, so as to acquire cone beam projection data in a plurality of fields of view.
In practical application, when cone beam projection data under multiple views are acquired in a CL scanning mode, if the inclination angle of a certain detection target is too large, cone beam projection data under more views can be acquired by increasing the total moving distance, so that forward projection data covering all detection targets can be ensured.
And 2) carrying out data rearrangement on the conical beam projection data to obtain parallel beam projection data under different angles.
Specifically, the method for performing data rearrangement on each cone beam projection data includes: and splitting the light rays of the cone beam projection data under the multiple views, and rearranging the cone beam projection data according to different angles to obtain the parallel beam projection data under different angles. More specifically, the rearrangement according to different angles further includes a step of interpolation processing.
In this embodiment, the cone beam projection data is data obtained by performing detection by a detector after the cone beam X-ray scans the detection object; the method comprises the steps of splitting rays of cone-beam X-rays under each view according to angles, and arranging rays with the same angle in the cone-beam X-rays under a plurality of views according to distances to obtain parallel rays with the same angle, wherein projection data corresponding to the parallel rays under the same angle are a group of parallel beam projection data, and the distance is the distance from a motion starting point to each view of a ray source. In practical applications, the cone beam X-rays may be equally divided into a plurality of groups according to a certain angle, for example, one group for every 0.1 ° according to the accuracy of the required central orthographic projection image, and 300 groups of parallel beam projection data may be obtained under the condition that the opening angle of the cone beam X-rays is 30 °.
When the cone beam projection data are rearranged to obtain the parallel beam projection data, because the angle of the X ray generated by the ray source has discreteness, in the process of splitting and recombining the cone beam rays, the numerical value discontinuity can occur in combination with the process of computer rounding, so that some null values exist in the parallel beam projection data, and interpolation processing can be used for complementing the null to ensure the quality of the image. The interpolation types are various and can be selected according to the requirements; optionally, the present embodiment uses linear interpolation.
And 3) carrying out forward projection detection on each detection target based on each parallel beam projection data to obtain forward projection data of each detection target.
Specifically, the method for performing orthographic projection detection on each detection target based on each parallel beam projection data comprises the following steps: and selecting the maximum value from the parallel beam projection data of each detection target under different angles as the forward projection data of each detection target.
In this embodiment, each of the detection targets corresponds to different parallel beam projection data at different angles, and the maximum value is found by comparing the parallel beam projection data corresponding to the same detection target at different angles, that is, the forward projection data of the detection target is obtained. By using the method, the orthographic projection data of all the detection targets are found.
And 4) acquiring a central orthographic projection image of the detected object based on the orthographic projection data of each detection target.
Specifically, the method for acquiring the central orthographic projection image of the detected object based on the orthographic projection data of each detection target comprises the following steps: acquiring an orthographic projection angle corresponding to the orthographic projection data of each detection target, and judging whether the orthographic projection angles of the detection targets are the same or not; if the central forward projection image is the same as the central forward projection image, acquiring a central forward projection image of the detected object by using forward projection data from all detection targets under the same forward projection angle; and if the detection objects are different, splicing the orthographic projection data of all the detection objects to obtain spliced projection data, and acquiring a central orthographic projection image of the detection object by using the spliced projection data.
In this embodiment, the forward projection data of each detection target is the maximum value of the parallel beam projection data, and therefore, the angle corresponding to the maximum value in the parallel beam projection data is the forward projection angle of the detection target.
More specifically, the method for splicing the forward projection data of each detection target to obtain the spliced projection data includes: and copying the forward projection data of each detection target together according to the position relation of the forward projection data, thereby obtaining spliced projection data. When splicing is specifically carried out, splicing can be carried out according to a left-to-right sequence, or splicing can be carried out according to a right-to-left sequence, and a splicing mode can be selected as required. And obtaining a central orthographic projection image of the detected object by using the spliced projection data. And obtaining the central orthographic projection image through the spliced projection data, so that the quality of the image is ensured.
Specifically, the detection target includes an electrode sheet. The electrode plate is arranged in the lithium battery with a small gap and is divided into a positive electrode plate and a negative electrode plate, clear images of the positive electrode plate and the negative electrode plate are required to be obtained in order to obtain the relative position information between the positive electrode plate and the negative electrode plate in the lithium battery, the clear images of the electrode plate can be obtained through the method, the quality of the images is effectively improved, and therefore the relative position information of the positive electrode plate and the negative electrode plate in the lithium battery can be accurately obtained.
Referring to fig. 2 to fig. 22, the effect of the method for obtaining the orthographic projection image of the center of the object to be detected in the present embodiment is described with reference to the specific simulation experiment result, where the object to be detected in the simulation experiment includes a cylinder and an electrode sheet.
Fig. 2 shows a vertically arranged cylindrical array, and fig. 3 shows a projection image obtained by scanning the cylindrical array shown in fig. 2 in a CT scanning mode, that is, a projection image under irradiation of cone beam X-rays, and it can be seen from fig. 3 that cylindrical projections on both sides of the projection image are stacked. Fig. 4 shows a central orthographic projection image obtained from the orthographic projection data, and it is seen from fig. 4 that the images of the two side cylinders in the central orthographic projection image obtained from the orthographic projection data are also clear, so that the cone angle effect is effectively eliminated, but the central orthographic projection image obtained is discontinuous due to the null value in the orthographic projection data, so that the projection data needs to be interpolated. Fig. 5 shows the center orthographic projection image obtained after the interpolation processing, and it can be seen from the figure that the center orthographic projection image after the interpolation processing has continuous pictures, thereby further improving the quality of the image.
Fig. 6 shows a cylindrical array which is arranged in a left-right inclination periodic variation at preset angles of-40 ° and 40 °, respectively, fig. 7 is a projected image obtained by scanning the cylindrical array shown in fig. 6 in a CT scanning mode, and fig. 8 is a projected image obtained from parallel beam projection data at a certain angle; fig. 9 is a projected image with a forward projection direction of-40 ° extracted by performing interpolation processing on the forward projection data, fig. 10 is a projected image with a forward projection direction of 40 ° extracted by performing interpolation processing on the forward projection data, fig. 11 is a center forward projected image obtained by stitching the forward projected images in the two forward projection directions, and as can be seen from fig. 11, the obtained center forward projected image effectively eliminates the cone angle effect.
Fig. 12 shows the cylindrical arrays arranged at the same angular interval from-15 deg. to 15 deg. and at 3 deg. intervals, and fig. 13 shows the cylindrical arrays of fig. 12 scanned by CT scan mode to obtain projection images. Fig. 14 is a projection image obtained by performing interpolation processing on parallel beam projection data at a certain angle; fig. 15 is a central orthographic projection image obtained from the stitched projection data after stitching the orthographic projection data of each cylinder, and as can be seen from fig. 15, the cone angle effect is effectively eliminated from the obtained central orthographic projection image.
Fig. 16 shows a cylinder array including 8 columns of cylinders arranged from left to right, 4 columns on the left side being one set and uniformly arranged at an inclination angle of 30 °, 4 columns on the right side being one set and uniformly arranged at an inclination angle of 70 °, fig. 17 being a diagonal scan projection image obtained by scanning the cylinder array shown in fig. 16 in a CL scan mode, and fig. 18 being a center forward projection image obtained by interpolating the forward projection data. As can be seen from fig. 18, the resulting central orthographic projection image effectively eliminates the cone angle effect.
Fig. 19 shows an electrode sheet array including 8 rows of electrode sheets arranged from left to right, the left 4 rows being one set and uniformly arranged at an inclination angle of 30 °, and the right 4 rows being one set and uniformly arranged at an inclination angle of 70 °. Fig. 20 shows a diagonal scan projection image obtained by scanning the electrode sheet array in the CL scan mode, fig. 21 is a projection image obtained by performing interpolation processing on parallel projection data at a certain angle, and fig. 22 is a central forward projection image obtained by stitching forward projection data of each electrode sheet and by stitching the projection data. It can be seen from fig. 22 that the central orthographic projection image simulated using the electrode plate also effectively eliminates the cone angle effect.
Accordingly, the present embodiment also provides a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, implements the method of acquiring a center forward projection image of a test object as described above.
In particular, the computer-readable storage medium may include, but is not limited to, floppy diskettes, optical disks, CD-ROMs (compact disc-read only memories), magneto-optical disks, ROMs (read only memories), RAMs (random access memories), EPROMs (erasable programmable read only memories), EEPROMs (electrically erasable programmable read only memories), magnetic or optical cards, flash memory, or other type of media/machine-readable medium suitable for storing machine-executable instructions, and further, the computer-readable storage medium may be an article of manufacture that is not accessible to, or a component of use that is accessible to, the computer apparatus.
Correspondingly, the embodiment also provides a terminal, which includes a processor and a memory, the memory is used for storing a computer program, and the processor is used for executing the computer program stored by the memory, so that the terminal executes the method for acquiring the forward projection image of the center of the detected object as described above.
Specifically, the Processor may be a general-purpose Processor, and includes one or more Central Processing Units (CPUs), a Network Processor (NP), and the like; the Integrated Circuit may also be a Microcontroller (MCU), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc. The memory may include, but is not limited to, high speed random access memory, non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid state storage devices.
In summary, according to the method for acquiring the orthographic projection image of the center of the detected object, the readable storage medium and the terminal, the conical beam projection data are subjected to data rearrangement to obtain the parallel beam projection data, the parallel beam projection data are utilized to obtain the orthographic projection data, and the center orthographic projection image is obtained according to the orthographic projection data, so that the cone angle effect of the image is effectively eliminated, and the quality of the image is improved; moreover, the electrode plates with different inclination angles can be leveled to the surface which we want to observe by carrying out data rearrangement through cone beam data, so that the detection efficiency of the electrode plates is improved. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. A method of acquiring an orthographic projection image of a center of an object under inspection, the method comprising:
continuously scanning a plurality of detection targets in the detection object by utilizing a ray source to acquire cone beam projection data under a plurality of views covering the orthographic projection directions of all the detection targets;
rearranging the data of the conical beam projection data to obtain parallel beam projection data under different angles;
carrying out forward projection detection on each detection target based on each parallel beam projection data to obtain forward projection data of each detection target;
a central orthographic projection image of the test object is acquired based on the orthographic projection data of each test object.
2. The method of claim 1, wherein the step of performing a data rebinning on each cone beam projection data comprises:
and splitting the light rays of the cone beam projection data under the multiple views, and rearranging the cone beam projection data according to different angles to obtain the parallel beam projection data under different angles.
3. The method of claim 2, further comprising the step of interpolation when rearranging according to different angles.
4. The method of acquiring a central orthographic projection image of a test object according to claim 1, wherein the method of orthographic projection detection of each test object based on each parallel beam projection data comprises: and selecting the maximum value from the parallel beam projection data of each detection target under different angles as the forward projection data of each detection target.
5. The method of acquiring a central orthographic projection image of a test object as recited in claim 1, wherein the method of acquiring the central orthographic projection image of the test object based on the orthographic projection data of each test object comprises:
acquiring an orthographic projection angle corresponding to the orthographic projection data of each detection target, and judging whether the orthographic projection angles of the detection targets are the same or not;
if the central forward projection image is the same as the central forward projection image, acquiring a central forward projection image of the detected object by using forward projection data from all detection targets under the same forward projection angle;
and if the detection targets are different, splicing the orthographic projection data of the detection targets to obtain spliced projection data, and acquiring a central orthographic projection image of the detected object by using the spliced projection data.
6. The method for acquiring the forward projection image of the center of the detected object as claimed in claim 1, wherein the method for continuously scanning a plurality of detected objects in the detected object by using the radiation source comprises:
in a computed tomography mode, the detection object is fixed, and the ray source rotates around the detection object at preset interval angles, so that a plurality of detection targets in the detection object are continuously scanned; or the ray source is fixed, and the detection object rotates at preset interval angles, so that a plurality of detection targets in the detection object are continuously scanned.
7. The method for acquiring the forward projection image of the center of the detected object as claimed in claim 1, wherein the method for continuously scanning a plurality of detected objects in the detected object by using the radiation source comprises:
in a computer tomography mode, the detection object is fixed, and the ray sources move parallelly at preset intervals to realize continuous scanning of a plurality of detection targets in the detection object; or the radiation source is fixed, and the detection objects move parallelly at preset intervals.
8. The method for acquiring the forward projection image of the center of the test object according to claim 1, wherein the test target comprises an electrode sheet.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method of acquiring a center orthographic projection image of a test object according to any one of claims 1-7.
10. A terminal, characterized in that the terminal comprises a processor and a memory, the memory is used for storing a computer program, the processor is used for executing the computer program stored by the memory, so that the terminal executes the method for acquiring the forward projection image of the center of the detected object according to any one of claims 1 to 7.
CN202210430981.8A 2022-04-22 2022-04-22 Method for acquiring orthographic projection image of center of detected object, readable storage medium and terminal Pending CN114943687A (en)

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