WO2021042638A1 - Procédé et appareil d'extraction d'une image cible de test d'un verre d'inclinaison xpr de projecteur, et dispositif électronique - Google Patents

Procédé et appareil d'extraction d'une image cible de test d'un verre d'inclinaison xpr de projecteur, et dispositif électronique Download PDF

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Publication number
WO2021042638A1
WO2021042638A1 PCT/CN2019/129219 CN2019129219W WO2021042638A1 WO 2021042638 A1 WO2021042638 A1 WO 2021042638A1 CN 2019129219 W CN2019129219 W CN 2019129219W WO 2021042638 A1 WO2021042638 A1 WO 2021042638A1
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Prior art keywords
gravity
centers
target image
image
center
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PCT/CN2019/129219
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English (en)
Chinese (zh)
Inventor
赵团伟
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歌尔股份有限公司
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/12—Edge-based segmentation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/187—Segmentation; Edge detection involving region growing; involving region merging; involving connected component labelling
    • 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
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30108—Industrial image inspection

Definitions

  • the present invention relates to the technical field of image processing, and more specifically, to a method for extracting a test target image of a projector galvanometer, a device for extracting a test target image of a projector galvanometer, an electronic device, and a computer readable Storage medium.
  • the vibration of its galvanometer needs to be tested when it leaves the factory.
  • the vibration of the galvanometer of the DLP projector is judged by the human eye, which is highly subjective, low in accuracy, and easy to cause fatigue and low efficiency.
  • an industrial camera can be used to capture the image when the galvanometer is vibrating, extract a target image containing a group of unit vibration images from the image, and then extract a unit vibration image from the target image to determine The vibration of the galvanometer.
  • One difficulty of this automatic test is to extract the test target image of the projector galvanometer from the image taken by the industrial camera.
  • An object of the present invention is to provide a new technical solution for extracting the target image in the vibration test of the projector.
  • a method for extracting a test target image of a projector galvanometer which includes:
  • the target image is obtained according to the starting position of the target image and the outline size of the target image.
  • the step of selecting multiple centers of gravity that conform to a preset positional relationship from the centers of gravity of the connected regions includes:
  • the step of determining the starting position of the target image according to the position information of the multiple centers of gravity includes:
  • the center of the four centers of gravity is used as the starting position of the target image.
  • the step of obtaining the outline size of the target image according to the size information of the standard galvanometer unit image and the size information of the multiple centers of gravity includes:
  • the outline size in the standard galvanometer unit and the scale factor the outline size of the target image is obtained.
  • the step of initially selecting four centers of gravity from the centers of gravity of the connected regions includes:
  • a center of gravity is initially selected from the centers of gravity of the connected regions, and then three other centers of gravity are selected within a preset distance range from the selected center of gravity to obtain the four centers of gravity.
  • the reference size is the distance from a certain vertex of the standard galvanometer unit to the center of gravity of the nearest subunit, and the corresponding size is from a certain center of gravity of the plurality of centers of gravity to the plurality of centers of gravity.
  • the step of acquiring the connected region and the center of gravity of the connected region in the sampled image after preprocessing includes:
  • the center of gravity of the connected area is obtained.
  • the step of preprocessing the sampled image taken by the industrial camera includes:
  • the cropped sampled image is processed into a binarized image based on a preset monochrome channel, and the binarized image is denoised to obtain a preprocessed sampled image.
  • a device for extracting a test target image of a projector galvanometer including:
  • the image acquisition module is used to preprocess the sampled image taken by the industrial camera, and acquire the connected area and the center of gravity of the connected area in the preprocessed sampled image;
  • a starting position acquiring module configured to select multiple centers of gravity that conform to a preset position relationship from the centers of gravity of the connected regions, and determine the starting position of the target image according to the position information of the multiple centers of gravity;
  • An outline size obtaining module configured to obtain the outline size of the target image according to the size information of the standard galvanometer unit image and the size information of the multiple centers of gravity;
  • the target image acquisition module is configured to obtain the target image according to the starting position of the target image and the outline size of the target image.
  • an electronic device including: a memory and a processor, the memory is used to store instructions, and the instructions are used to control the processor to operate to perform the first step according to the present invention. The method described in the aspect.
  • a computer-readable storage medium on which a computer program is stored, and the computer program, when executed by a processor, implements the method according to the first aspect of the present invention.
  • the method for extracting the target image in the galvanometer measurement of the projector provided by the embodiment of the present invention realizes the automatic extraction of the image of the test unit and improves the accuracy of the extraction work.
  • FIG. 1 is a block diagram of the hardware configuration of an electronic device that can be used to implement a method for extracting a target image in a galvanometer test of a projector according to any embodiment of the present invention.
  • Fig. 2 is a processing flowchart of a method for extracting a target image in a galvanometer test of a projector according to an embodiment of the present invention.
  • Fig. 3 shows a schematic diagram of an image projected by a projector.
  • Figure 4 is a schematic diagram of sampled graphics cropping in this example.
  • Fig. 5 is a schematic diagram of the binarized image in this example.
  • Figure 6 is a schematic diagram of determining the starting position of the target image in this example.
  • Fig. 7 is a schematic diagram of a standard galvanometer unit diagram in this example.
  • Fig. 8 is a schematic diagram of the reference edge in this example.
  • Fig. 9 is a schematic diagram of the target map obtained in this example.
  • Fig. 10 is a schematic diagram of a device for extracting a target image in a galvanometer test of a projector according to an embodiment of the present invention.
  • Fig. 11 is a schematic diagram of an electronic device according to an embodiment of the present invention.
  • FIG. 1 is a block diagram of the hardware configuration of an electronic device that can be used to implement a method for extracting a test target image of a projector galvanometer according to any embodiment of the present invention.
  • the electronic device 1000 may be an electronic device such as a mobile phone, a portable computer, a tablet computer, and a palmtop computer.
  • the electronic device 1000 may include a processor 1100, a memory 1200, an interface device 1300, a communication device 1400, a display device 1500, an input device 1600, a speaker 1700, a microphone 1800, and so on.
  • the processor 1100 may be a central processing unit (CPU), a microprocessor MCU, or the like.
  • the memory 1200 includes, for example, ROM (Read Only Memory), RAM (Random Access Memory), nonvolatile memory such as a hard disk, and the like.
  • the interface device 1300 includes, for example, a USB interface, a headphone interface, and the like.
  • the communication device 1400 can perform wired or wireless communication, for example.
  • the display device 1500 is, for example, a liquid crystal display, a touch display, or the like.
  • the input device 1600 may include, for example, a touch screen, a keyboard, and the like. The user can input/output voice information through the speaker 1700 and the microphone 1800.
  • the present invention may only involve some of the devices.
  • the electronic device 1000 only involves the memory 1200 and the processor 1100.
  • the memory 1200 of the electronic device 1000 is used to store instructions, and the instructions are used to control the processor 1100 to execute the method for extracting the test target image of the projector galvanometer provided by the embodiment of the present invention.
  • Fig. 2 is a processing flowchart of a method for extracting a test target image of a projector galvanometer according to an embodiment of the present invention.
  • the method for extracting the test target image of the projector galvanometer is implemented by electronic equipment.
  • the method for extracting the test target image of the projector galvanometer may include the following steps S2100-S2400.
  • Step S2100 Preprocess the sampled image taken by the industrial camera, and obtain the connected area and the center of gravity of the connected area in the preprocessed sampled image.
  • Fig. 3 shows a schematic diagram of an image projected by a projector.
  • the projector projects an image on the projection screen ABCD, the projected image area is A1B1C1D1, and the projector lens is parallel to the plane where the projection screen is located.
  • the industrial camera is installed in the fixture and used to shoot the projected image projected by the projector onto the projection screen.
  • the optical axis of the optical components of the industrial camera is perpendicular to the plane where the projection screen is located.
  • the electronic equipment is used to control the industrial camera to take pictures and obtain the projected images collected by the industrial camera for processing.
  • the electronic device is also used to control the galvanometer of the projector to turn on the fixed vibration mode.
  • An industrial camera is used to shoot the image projected by the projector to obtain a sampled image.
  • preprocessing the sampled images taken by the industrial camera includes the following steps S2110-S2120:
  • step S2110 the sampled image is cropped.
  • the short side of the original sampled image is the length of the side
  • the center of the original sampled image is cropped, and the cropping result is a square.
  • Step S2120 Process the cropped sampled image into a binarized image based on the preset monochrome channel, and denoise the binarized image to obtain a preprocessed sampled image.
  • the gray value of the pixel whose brightness value of the preset monochrome channel exceeds the preset brightness threshold can be set to 255, and the preset brightness value can be set to 255.
  • the gray value of the pixel whose brightness value of the monochrome channel does not exceed the preset brightness threshold is set to 0 to obtain a binary image.
  • the connected area and the center of gravity of the connected area in the preprocessed sampled image are obtained.
  • the connected regions in the sampled image correspond to the sub-units in the unit vibration image.
  • the connected area is formed by pixels with a gray value of 255.
  • acquiring the connected regions in the sampled image includes:
  • the connected area is obtained.
  • a group of pixels with gray values of 255 and adjacent to each other is selected from the sampled image, and the set of these pixels constitutes a connected area.
  • obtaining the center of gravity of the connected region includes:
  • the center of gravity of the connected area is obtained.
  • first obtain the center position coordinates of each pixel in the connected area and then calculate the average value of the center position coordinates of all pixels in the connected area, and the average value is the center of gravity coordinates of the connected area.
  • Step S2200 Select multiple centers of gravity that conform to a preset position relationship from the centers of gravity of the connected regions, and determine the starting position of the target image according to the position information of the multiple centers of gravity.
  • the number of selected centers of gravity is four.
  • the step of selecting multiple centers of gravity conforming to the preset position relationship from the centers of gravity of the connected regions includes the following steps S2210-S2220:
  • Step S2210 Preliminarily select four centers of gravity from the centers of gravity of the connected regions, and obtain the centers of gravity of a quadrilateral with the four centers of gravity as vertices as the centers of the four centers of gravity.
  • a quadrilateral can be obtained by taking the four initially selected centers of gravity as vertices. Calculate the center of gravity of the quadrilateral, which is the center of the four centers of gravity.
  • center coordinates of the four centers of gravity are equal to the average of the coordinates of the four centers of gravity.
  • step S2220 in the case where the distance difference between the four centers of gravity to the center is less than a preset threshold, the four centers of gravity are used as multiple centers of gravity that conform to the preset positional relationship.
  • the step of determining the starting position of the target image according to the position information of the multiple centers of gravity includes: taking the centers of the four centers of gravity as the starting position of the target image.
  • the center of the four centers of gravity corresponds to a vertex of the target graph, and can be used as the starting position for determining the target graph.
  • the number of centers of gravity selected in the above example is four.
  • the number of centers of gravity is other numbers, such as three, five, etc., those skilled in the art can also obtain the starting position of the target image according to the matching relationship between the arrangement of these centers of gravity and the target image.
  • step S2300 the outline size of the target image is obtained according to the size information of the standard galvanometer unit image and the size information of multiple centers of gravity.
  • the standard galvanometer unit graph reflects the ideal vibration situation, which includes a group of unit vibration images, and the size information in the graph is known. Among them, a group of unit vibration images includes multiple subunits.
  • the step of obtaining the outline size of the target image according to the size information of the standard galvanometer unit image and the size information of multiple centers of gravity includes the following steps S2310-2320:
  • Step S2310 according to the reference size in the standard galvanometer unit diagram and the corresponding sizes determined by multiple centers of gravity, a scale factor for size conversion is obtained.
  • the reference size is the distance from a vertex of the standard galvanometer unit to the center of gravity of the nearest subunit
  • the corresponding size is the distance from a certain center of gravity to the center of multiple centers of gravity. It is the center of gravity of a polygon with multiple centers of gravity as vertices. According to the ratio of the reference size to the corresponding size, the scale factor used for size conversion can be determined
  • step S2320 the contour size of the target image is obtained according to the contour size and the scale factor in the standard galvanometer unit.
  • step S2400 the target image is obtained according to the starting position of the target image and the outline size of the target image.
  • the preprocessed sampled image take the above-mentioned starting position as a starting point and perform cropping according to the above-mentioned outline size, and the obtained image is the target image.
  • the sub-unit images can be extracted based on the target image, the tilt angle difference of each sub-unit image before and after the vibration of the galvanometer is calculated, and the working state of the galvanometer is determined according to the tilt angle difference.
  • the method for extracting the target image in the galvanometer measurement of the projector provided by the embodiment of the present invention realizes the automatic extraction of the target image and improves the accuracy of the extraction work.
  • the following provides a specific example of the implementation of the method for extracting the target image in the galvanometer measurement.
  • the left side of Figure 4 is a sampled image obtained by shooting a projected image with an industrial camera.
  • the sampled image is cropped to obtain a square with the short side of the sampled image as the side length and the center of the sampled image as the center, as shown on the right side of FIG. 4.
  • pixels with a gray value of 255 and adjacent relationships are selected to form connected areas, and multiple white connected areas shown in FIG. 5 are obtained.
  • For each white connected area calculate the average value of the coordinates of all pixels in the connected area to obtain the barycentric coordinates of the connected area.
  • the center of gravity of the connected region thus obtained is shown as point A, point B, point C... in Figure 5.
  • the center of gravity A is selected.
  • the other three centers of gravity are selected from the preset distance range of point A, for example, the centers of gravity B, C, and D are selected, and the four centers of gravity are initially selected.
  • the center of gravity that is far away from A can be excluded, such as the center of gravity E, F, and G, thereby reducing the amount of calculation.
  • Verify that the initially selected centers of gravity A, B, C, and D meet the preset positional relationship. Calculate the average value of the coordinates of the center of gravity A, B, C, and D. The average value is the center coordinates of the center of gravity A, B, C, and D. From this, the center of the center of gravity A, B, C, and D is obtained as point O in Figure 6 Shown. Obtain the lengths of OA, OB, OC, and OD. Assuming that the largest value of the above-mentioned length is OA, and the smallest is OD, calculate the difference between OA and OD, and record it as diff OA-OD.
  • diff ⁇ 5 it is considered that the center of gravity A, B, C, and D meet the preset positional relationship, and subsequent calculations can be performed. If diff ⁇ 5 (pixels), the center of gravity A, B, C, and D do not meet the preset positional relationship. In this case, discard the points A, B, C, and D selected in this round, and follow the distance to the far point. Continue to select a center of gravity in the order of near to far, for example, select center of gravity E, and continue to select and verify in the above-mentioned manner.
  • the center of gravity O of A, B, C, and D is taken as the starting position of the target map.
  • Figure 7 shows a diagram of the standard galvanometer unit used in this example. It can be seen that the standard galvanometer unit includes four sub-units represented by black areas, and the size information in the figure is known, for example, the side length of the standard galvanometer unit is 32 pixels.
  • Figure 8 shows the reference edge O'A' in the standard galvanometer unit diagram in this example.
  • O' is a vertex in the standard galvanometer unit graph
  • A' is the center of gravity of the subunit closest to the vertex.
  • the length of O'A' is Correspondingly, the corresponding edge in the binarized image is OA.
  • the binarized image is cropped according to the starting position O of the target image and the outline size w of the target image to obtain the target image, which is the area within the dashed box in FIG. 9.
  • Fig. 10 is a block diagram of a device for extracting a target image in a galvanometer measurement of a projector according to an embodiment of the present invention.
  • the device 100 for extracting the target image of the projector galvanometer test includes an image acquisition module 101, a starting position acquisition module 102, an outline size acquisition module 103 and a target image acquisition module 104.
  • the image acquisition module 101 is used to preprocess the sampled image taken by the industrial camera, and acquire the connected area and the center of gravity of the connected area in the preprocessed sampled image.
  • the starting position acquiring module 102 is configured to select multiple centers of gravity that conform to a preset position relationship from the centers of gravity of the connected regions, and determine the starting position of the target image according to the position information of the multiple centers of gravity;
  • the outline size obtaining module 103 is configured to obtain the outline size of the target image according to the size information of the standard galvanometer unit image and the size information of multiple centers of gravity;
  • the target image acquisition module 104 is configured to obtain the target image according to the starting position of the target image and the outline size of the target image.
  • the starting position acquisition module 102 executes the step of selecting multiple centers of gravity that conform to the preset position relationship from the centers of gravity of the connected regions, it is also used to: initially select four centers of gravity from the centers of gravity of the connected regions, Obtain the center of gravity of the quadrilateral with the four centers of gravity as the vertices, as the centers of the four centers of gravity; when the distance difference between the four centers of gravity to the center is less than the preset threshold, the four centers of gravity are regarded as multiples that conform to the preset position relationship Center of gravity.
  • the starting position acquiring module 102 is also used to use the centers of the four centers of gravity as the starting position of the target image when performing the step of determining the starting position of the target image by the position information of the multiple centers of gravity.
  • the contour size obtaining module 103 is also used to: according to the standard galvanometer unit diagram size information and multiple center of gravity size information to obtain the contour size of the target image
  • the reference size and the corresponding sizes determined by the multiple centers of gravity are used to obtain the scale factor for size conversion; the outline size of the target image is obtained according to the outline size and the scale factor in the standard galvanometer unit.
  • the starting position acquisition module 102 when the starting position acquisition module 102 performs the four steps of preliminarily selecting the center of gravity from the center of gravity of the connected area, it is also used to: first select a center of gravity from the center of gravity of the connected area, and then start from the preset of the center of gravity. Choose the other three centers of gravity within the distance range to get four centers of gravity.
  • the reference size is the distance from a vertex of the standard galvanometer unit graph to the center of gravity of the nearest subunit, and the corresponding size is the distance from a center of gravity to the center of the multiple centers of gravity.
  • the center of each center of gravity is the center of gravity of a polygon with multiple centers of gravity as vertices.
  • the image acquisition module 101 when the image acquisition module 101 executes the step of acquiring the connected region and the center of gravity of the connected region in the preprocessed sampled image, it is also used to: according to the pixel value of each pixel in the preprocessed sampled image The connected area is obtained by the adjacent relationship between the pixel and the pixel; and the center of gravity of the connected area is obtained according to the pixel distribution of the connected area.
  • the image acquisition module 101 when the image acquisition module 101 performs the step of preprocessing the sampled image taken by the industrial camera, it is also used to: crop the sampled image; process the cropped sampled image based on the preset monochrome channel It is a binarized image, and the binarized image is denoised to obtain a preprocessed sampled image.
  • the electronic device may include the device 100 for extracting the target image in the galvanometer measurement of the projector according to any embodiment of the present invention, which is used to implement the method for extracting the target image in the galvanometer measurement of the projector according to any embodiment of the present invention.
  • the electronic device 110 shown in FIG. 11 may include a processor 112 and a memory 111.
  • the memory 111 is used for storing executable instructions
  • the processor 120 is used for operating the electronic device 110 according to the control of the instructions to execute the method for extracting the target image in the galvanometer measurement of the projector according to any embodiment of the present invention.
  • a computer-readable storage medium is also provided, on which a computer program is stored.
  • the computer program is executed by the processor, the method for extracting the target image in the galvanometer measurement of the projector as in any embodiment of the present invention is realized. .
  • the present invention may be a system, a method and/or a computer program product.
  • the computer program product may include a computer-readable storage medium loaded with computer-readable program instructions for enabling a processor to implement various aspects of the present invention.
  • the computer-readable storage medium may be a tangible device that can hold and store instructions used by the instruction execution device.
  • the computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing.
  • Non-exhaustive list of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) Or flash memory), static random access memory (SRAM), portable compact disk read-only memory (CD-ROM), digital versatile disk (DVD), memory stick, floppy disk, mechanical encoding device, such as a printer with instructions stored thereon
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable programmable read-only memory
  • flash memory flash memory
  • SRAM static random access memory
  • CD-ROM compact disk read-only memory
  • DVD digital versatile disk
  • memory stick floppy disk
  • mechanical encoding device such as a printer with instructions stored thereon
  • the computer-readable storage medium used here is not interpreted as the instantaneous signal itself, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (for example, light pulses through fiber optic cables), or through wires Transmission of electrical signals.
  • the computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to various computing/processing devices, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and/or a wireless network.
  • the network may include copper transmission cables, optical fiber transmission, wireless transmission, routers, firewalls, switches, gateway computers, and/or edge servers.
  • the network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network, and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing/processing device .
  • the computer program instructions used to perform the operations of the present invention may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, status setting data, or in one or more programming languages.
  • Programming languages include object-oriented programming languages-such as Smalltalk, C++, etc., and conventional procedural programming languages-such as "C" language or similar programming languages.
  • Computer-readable program instructions can be executed entirely on the user's computer, partly on the user's computer, executed as a stand-alone software package, partly on the user's computer and partly executed on a remote computer, or entirely on the remote computer or server carried out.
  • the remote computer can be connected to the user's computer through any kind of network-including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (for example, using an Internet service provider to connect to the user's computer) connection).
  • LAN local area network
  • WAN wide area network
  • an electronic circuit such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), can be customized by using the status information of the computer-readable program instructions.
  • the computer-readable program instructions are executed to implement various aspects of the present invention.
  • These computer-readable program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine that makes these instructions when executed by the processor of the computer or other programmable data processing device , A device that implements the functions/actions specified in one or more blocks in the flowcharts and/or block diagrams is produced. It is also possible to store these computer-readable program instructions in a computer-readable storage medium. These instructions make computers, programmable data processing apparatuses, and/or other devices work in a specific manner. Thus, the computer-readable medium storing the instructions includes An article of manufacture, which includes instructions for implementing various aspects of the functions/actions specified in one or more blocks in the flowcharts and/or block diagrams.
  • each block in the flowchart or block diagram can represent a module, program segment, or part of an instruction, and the module, program segment, or part of an instruction contains one or more executables for implementing the specified logical functions. instruction.
  • the functions marked in the block may also occur in a different order than the order marked in the drawings. For example, two consecutive blocks can actually be executed in parallel, or they can sometimes be executed in the reverse order, depending on the functions involved.
  • each block in the block diagram and/or flowchart, and the combination of the blocks in the block diagram and/or flowchart can be implemented by a dedicated hardware-based system that performs the specified functions or actions Or it can be realized by a combination of dedicated hardware and computer instructions. It is well known to those skilled in the art that implementation through hardware, implementation through software, and implementation through a combination of software and hardware are all equivalent.

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Abstract

L'invention concerne un procédé et un appareil d'extraction d'une image cible de test de verre d'inclinaison XPR de projecteur, et un dispositif électronique, le procédé comprenant : le prétraitement d'une image d'échantillon capturée par une caméra industrielle et l'acquisition d'une zone de communication dans l'image d'échantillon prétraitée ainsi que des centres de gravité de la zone de communication (S2100) ; la sélection, parmi les centres de gravité de la zone de communication, de multiples centres de gravité qui sont conformes à une relation de position prédéfinie, et la détermination d'une position de départ d'une image cible en fonction des informations de position des multiples centres de gravité (S2200) ; l'obtention de la taille de contour de l'image cible selon des informations de taille d'une image d'unité de verre d'inclinaison XPR standard et des informations de taille des multiples centres de gravité (S2300) ; et l'obtention de l'image cible en fonction de la position de départ de l'image cible et de la taille de contour de l'image cible (S2400).
PCT/CN2019/129219 2019-09-03 2019-12-27 Procédé et appareil d'extraction d'une image cible de test d'un verre d'inclinaison xpr de projecteur, et dispositif électronique WO2021042638A1 (fr)

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CN201910828707.4 2019-09-03

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