WO2021206053A1 - データ生成装置、データ生成方法及びプログラム - Google Patents

データ生成装置、データ生成方法及びプログラム Download PDF

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Publication number
WO2021206053A1
WO2021206053A1 PCT/JP2021/014494 JP2021014494W WO2021206053A1 WO 2021206053 A1 WO2021206053 A1 WO 2021206053A1 JP 2021014494 W JP2021014494 W JP 2021014494W WO 2021206053 A1 WO2021206053 A1 WO 2021206053A1
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image
images
label
partial images
input
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English (en)
French (fr)
Japanese (ja)
Inventor
修二郎 奥田
由 渡邉
浩 井筒
啓輔 兒玉
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Denka Co Ltd
Niigata University NUC
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Denka Co Ltd
Niigata University NUC
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Priority to KR1020227038232A priority Critical patent/KR20220164755A/ko
Priority to EP21785651.7A priority patent/EP4134909A4/en
Priority to CN202180024507.9A priority patent/CN115380307A/zh
Priority to US17/917,542 priority patent/US12387339B2/en
Priority to JP2022514063A priority patent/JP7236202B2/ja
Publication of WO2021206053A1 publication Critical patent/WO2021206053A1/ja
Anticipated expiration legal-status Critical
Priority to JP2023025993A priority patent/JP7642002B2/ja
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    • G06—COMPUTING OR CALCULATING; COUNTING
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    • G06T7/11—Region-based segmentation
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    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T11/00—Two-dimensional [2D] image generation
    • G06T11/10—Texturing; Colouring; Generation of textures or colours
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
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    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0012—Biomedical image inspection
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    • 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 OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/20—Image preprocessing
    • G06V10/26—Segmentation of patterns in the image field; Cutting or merging of image elements to establish the pattern region, e.g. clustering-based techniques; Detection of occlusion
    • G—PHYSICS
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    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
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    • G06V10/70—Arrangements for image or video recognition or understanding using pattern recognition or machine learning
    • G06V10/77—Processing image or video features in feature spaces; using data integration or data reduction, e.g. principal component analysis [PCA] or independent component analysis [ICA] or self-organising maps [SOM]; Blind source separation
    • G06V10/774—Generating sets of training patterns; Bootstrap methods, e.g. bagging or boosting
    • G—PHYSICS
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    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10024—Color image
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/20—Special algorithmic details
    • G06T2207/20021—Dividing image into blocks, subimages or windows
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/20—Special algorithmic details
    • G06T2207/20081—Training; Learning
    • G—PHYSICS
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    • 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
    • G06T2207/30004—Biomedical image processing
    • G06T2207/30096—Tumor; Lesion
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
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    • G06T2210/00—Indexing scheme for image generation or computer graphics
    • G06T2210/41—Medical
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    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V2201/00—Indexing scheme relating to image or video recognition or understanding
    • G06V2201/03—Recognition of patterns in medical or anatomical images

Definitions

  • the present invention relates to a data generator, a data generation method and a program.
  • Patent Document 1 a system that analyzes pathological images using artificial intelligence and performs pathological diagnosis is known.
  • a machine learning algorithm is trained using a plurality of annotated digital pathological images, and an abnormal image pattern corresponds to a pathological abnormality using a discriminative model generated by the learning. It is described to identify whether or not.
  • an object of the present invention is to provide a technique that enables easier generation of learning data related to images.
  • the data generation device includes a display control unit for displaying an image and a boundary line of a plurality of partial images generated by dividing the image into a plurality of images on a screen, and a plurality of partial images.
  • Learning to train a learning model by associating the input unit that accepts the input of the label given to each of the above, each of the plurality of partial images, and the label given to each of the plurality of partial images. It has a generation unit that generates data for use.
  • FIG. 1 is a diagram showing an example of an image processing system 1 for determining whether or not an abnormality is present in a pathological image.
  • the data generation device 10 is a device that generates learning data (teacher data) for learning a learning model included in the diagnostic device 20 by using the pathological image input to the data generation device 10.
  • the diagnostic device 20 is a device that determines whether or not an abnormality is present in the pathological image by using a learned model trained using the learning data generated by the data generation device 10.
  • the data generation device 10 and the diagnostic device 20 can communicate with each other via a wireless or wired communication network N.
  • the data generation device 10 superimposes the pathological image input to the data generation device 10 and the boundary line of a plurality of partial images generated by dividing the pathological image into a plurality of images and displays them on the screen.
  • the partial image may be referred to as a tile.
  • the size of the partial image (the number of pixels in the vertical direction and the horizontal direction) is the same size as the training data that can be input to the training model.
  • the data generation device 10 assigns each partial image displayed on the screen to the partial image by a pathologist or the like (hereinafter, referred to as “user”) who uses the data generation device 10. Accepts the input of the label related to.
  • the label will be described on the premise that it is two types of labels indicating whether or not a pathological abnormality is present in the partial image, but the present embodiment is not limited thereto. This embodiment can also be applied to the case where three or more types of labels are attached.
  • the data generation device 10 may generate learning data from one pathological image, or may generate learning data from a plurality of pathological images. When generating learning data from a plurality of pathological images, the data generation device 10 repeats a process of dividing the pathological image into a plurality of partial images and accepting input of a label for each pathological image. When the user has completed labeling of all the pathological images, the data generation device 10 generates learning data by associating the image data of each partial image with the label assigned to each partial image. The generated learning data is sent to the diagnostic device 20.
  • the diagnostic device 20 trains (trains) a learning model using the learning data sent from the data generation device 10.
  • the learning model is, for example, a neural network capable of having a predetermined ability by learning.
  • the diagnostic device 20 inputs a pathological image to be diagnosed into the learned model generated by learning, and determines whether or not an abnormality exists in the pathological image based on the output result from the learned model.
  • the data generation device 10 is illustrated as one information processing device, but the present embodiment is not limited to this.
  • the data generation device 10 may be configured by one or a plurality of physical servers or the like, or may be configured by using a virtual server operating on a hypervisor. It may be configured using a cloud server.
  • FIG. 2 is a diagram showing a hardware configuration example of the data generation device 10.
  • the data generation device 10 includes a processor 11 such as a CPU (Central Processing Unit) and a GPU (Graphical processing unit), a storage device 12 such as a memory, an HDD (Hard Disk Drive) and / or an SSD (Solid State Drive), and a wired or wireless device. It has a communication IF (Interface) 13 for communication, an input device 14 for accepting input operations, and an output device 15 for outputting information.
  • the input device 14 is, for example, a keyboard, a touch panel, a mouse and / or a microphone.
  • the output device 15 is, for example, a display, a touch panel, and / or a speaker.
  • FIG. 3 is a diagram showing an example of a functional block configuration of the data generation device 10.
  • the data generation device 10 includes a storage unit 100, a display control unit 101, an input unit 102, a generation unit 103, and an image processing unit 104.
  • the storage unit 100 can be realized by using the storage device 12 included in the data generation device 10.
  • the display control unit 101, the input unit 102, the generation unit 103, and the image processing unit 104 are realized by the processor 11 of the data generation device 10 executing the program stored in the storage device 12. Can be done.
  • the program can be stored in a storage medium.
  • the storage medium in which the program is stored may be a non-transitory computer readable medium.
  • the non-temporary storage medium is not particularly limited, but may be, for example, a storage medium such as a USB memory or a CD-ROM.
  • the storage unit 100 is generated as a pathological image DB (image DB) for storing one or more pathological images (images) used for generating learning data, and a label DB for storing labels given to partial images by the user. It stores a learning data DB that stores the learning data.
  • image DB pathological image DB
  • label DB label DB
  • the display control unit 101 causes an output device 15 such as a display, another information processing device that communicates with the data generation device 10, and the like to display various screens according to the present embodiment. Further, the display control unit 101 causes the pathological image (image) to display a screen on which the boundary line of the partial image is superimposed.
  • the input unit 102 receives various inputs from the user. Further, the input unit 102 receives input of a label to be given to each of the plurality of partial images from the user via the input device 14.
  • the input unit 102 stores the label given to each partial image in the label DB.
  • the input unit 102 may store the partial image ID that uniquely identifies each partial image in the label DB in association with the label given to each partial image.
  • the label may be input, for example, by selecting a partial image for inputting a label from each of the partial images displayed on the screen and accepting the designation of the label to be given to the partial image.
  • the input unit 102 when the input unit 102 generates learning data from a plurality of pathological images (plurality of images), the input unit 102 includes a plurality of pathological types corresponding to the plurality of pathological images (pathological types common to the plurality of pathological images). You may accept the input of the information about the image type corresponding to the image).
  • the generation unit 103 generates learning data for training the learning model by associating each of the plurality of partial images with the labels given to each of the plurality of partial images by the input unit 102. For example, the generation unit 103 acquires a partial image ID and a label from the label DB, and also obtains a partial image corresponding to the partial image ID from the pathological image (image) stored in the pathological image DB (image DB). Extract image data. Subsequently, the generation unit 103 generates learning data by combining the image data of the extracted partial image and the label corresponding to the partial image ID.
  • the image processing unit 104 changes the colors of a plurality of pathological images (plurality of images) according to a color changing method determined according to the type of pathology (image type) input to the input unit 102.
  • the changing method includes a method of changing the RGB value of each pixel in a plurality of pathological images (plural images) to a standardized value, and a method of randomly changing the RGB value of each pixel in a plurality of pathological images (plural images). It may include a way to change it.
  • FIG. 4 is a flowchart showing an example of a processing procedure performed by the data generation device 10.
  • the input unit 102 receives input of a pathological image used for generating learning data from the user, and stores the input pathological image in the pathological image DB (S10).
  • Pathological images are usually stained to make it easier to determine if they are abnormal. Examples of the staining method include hematoxylin-eosin staining, PAS staining, May-Gimza staining, Alcian blue staining, papanicorow staining, Azan staining, Elastica Wangison staining, and Elastica Masson staining.
  • the user When inputting a plurality of pathological images, the user inputs pathological images having the same pathological type. In the following description, it is assumed that a plurality of pathological images have been input by the user.
  • the input unit 102 receives input of information regarding the type of pathology from the user for the plurality of pathological images input in the processing procedure of step S10 (S11).
  • the type of pathology that can be input may be, for example, either "tumor” or "supermutation".
  • the user inputs "tumor” as the type of pathology when each of the plurality of pathological images is a tumor image, and when each of the plurality of pathological images is a hypervariant image, the user inputs "supermutation" as the type of pathology. ".
  • the image processing unit 104 changes the colors of the plurality of pathological images according to the color changing method according to the type of pathology input in the processing procedure of step S11 (S12).
  • the method of changing the color may be to change the RGB value of each pixel in a plurality of pathological images to a standardized value.
  • the image processing unit 104 sets the average value and standard deviation of the R (Red) value, the average value and standard deviation of the G (Green) value, and the average of the B (Blue) values for all the pixels in the plurality of pathological images. Calculate the value and standard deviation.
  • the image processing unit 104 standardizes the R values of all the pixels in the plurality of pathological images by using the average value and the standard deviation of the R values.
  • the color changing method may be a method of randomly shifting the RGB value of each pixel in a plurality of pathological images for each pathological image.
  • the image processing unit 104 randomly determines the number of RGB values to be shifted for each pathological image, and shifts the R value, the G value, and the B value by the determined values. For example, when the image processing unit 104 determines that the number of RGB values to be shifted is "5" for the first pathological image, the R value, G value, and B value of each pixel included in the pathological image are set to "5". Add 5 to.
  • the image processing unit 104 determines that the number for shifting the RGB values of the second pathological image is "-2", the R value, G value, and B value of each pixel included in the pathological image. Add -2 to.
  • the image processing unit 104 repeats the same processing for all pathological images. This makes it possible to disperse the colors of a plurality of pathological images.
  • the display control unit 101 selects one pathological image from the plurality of input pathological images, and displays a screen on which the boundary line of the partial image is superimposed on the selected pathological image (S13).
  • the input unit 102 accepts the input of the label to be given for each partial image (S14).
  • the label given to each partial image by the user is a label indicating that the partial image is a tumor image, or the partial image is not a tumor image. Is one of the labels indicating.
  • the label given to each partial image by the user is a label indicating that the partial image is a super-mutated image, or the partial image is super-mutated. It is one of the labels indicating that it is not an image of.
  • the input unit 102 stores the received label in the label DB in association with the partial image ID.
  • the data generation device 10 repeats the processing procedure of step S14.
  • the generation unit 103 generates learning data by associating the assigned label with the image data of each partial image for which labeling has been completed. (S16).
  • the determination of whether or not the label input is completed depends on whether or not the input unit 102 detects that a predetermined button (for example, a button for starting the generation of learning data) has been pressed on the screen. You may be told. Alternatively, it may be performed depending on whether or not a label is attached to a predetermined number of partial images.
  • a label is given to a predetermined number of partial images and the ratio of the given label (ratio for each type of label) is within a predetermined range (for example, a label showing an image of a tumor and an image of a tumor).
  • the ratio of the label to the label indicating that the label is not the same is approximately 1: 4, etc.), and it may be automatically determined that the label has been attached.
  • the generation unit 103 may divide the generated learning data into folders for each label and store them in the learning data DB. For example, the image data of the partial image labeled with a tumor and the image data of the partial image labeled without a tumor may be stored in separate folders.
  • the partial image in which the portion where the tissue does not exist is a predetermined ratio or more (the partial image satisfying the predetermined condition) may be excluded from the learning data.
  • the input unit 102 inputs a label for a partial image in which a specific color portion (for example, a white portion) is a predetermined ratio or more among the plurality of partial images in each pathological image. You may not accept it.
  • the generation unit 103 may not include the partial image in which the input of the label is not accepted by the input unit 102 among the plurality of partial images in the learning data to be generated. .. As a result, it is possible to prevent the generation of learning data inappropriate for learning the learning model.
  • FIG. 5 is a diagram showing an example of a screen for labeling.
  • FIG. 5 shows an example when the pathological image is an image containing tumor cells.
  • the selection menu M10 is a menu for designating the type of pathological image input by the user.
  • the selection menu M11 is a menu for designating a pathological image to be displayed on the screen when a plurality of pathological images are input.
  • 40 pathological images related to tumor cells have been input, and it is shown that the third pathological image is currently displayed.
  • a grid-like boundary line is superimposed on an enlarged image of a part of the pathological image.
  • one area surrounded by a boundary line corresponds to one partial image.
  • an image of the entire pathological image and a display frame V11 indicating an area of the pathological image that is enlarged and displayed in the display area W10 are displayed.
  • the position or size of the display frame V11 may be arbitrarily changed by, for example, operating a mouse.
  • the display control unit 101 enlarges and displays the pathological image in the display area W10 according to the changed position and size of the display frame V11. To change.
  • the size of the partial image (the number of pixels in the vertical direction and the horizontal direction) is predetermined according to the learning model of the learning target, the user may not be able to change it arbitrarily.
  • the size of the partial image is 300 pixels (pixels) in the vertical direction and 300 pixels (pixels) in the horizontal direction.
  • a display frame T10 indicating the position of the partial image that accepts the input of the label from the user is displayed.
  • the position of the display frame T10 can be arbitrarily changed by selecting a partial image in which the user wants to input a label. By displaying the display frame T10, the user can recognize at which position the partial image is to be labeled.
  • the information indicating the input label is displayed superimposed on the partial image.
  • the letter "T” is displayed in the upper left, indicating that the partial image is not an image of a tumor cell.
  • the letter "N” is displayed in the upper left of the partial image to which the indicated label is attached.
  • the ratio of the labels already assigned is displayed as information indicating the actual value of the ratio of each label assigned to the plurality of partial images. That is, in the example of FIG. 5, it is desirable that the ratio of the number of partial images labeled with T to the number of partial images labeled with N is 1: 4, but at present, the portion labeled with T. It is shown that the ratio of the number of images to the number of partial images labeled N is 1: 2. Therefore, the user can recognize that it is necessary to find and label a partial image that is not an image of tumor cells until the ratio displayed in the display area N10 is 1: 4.
  • the display control unit 101 causes the labeling screen to display both the target value of the number of partial images to be labeled and the information indicating the actual value of the number of partial images to which the label is attached. You may. For example, it is assumed that there is a condition that the recognition accuracy of the learning model becomes high when 2,000 images are trained as the learning data.
  • a standard of "the target number of tiles to be labeled is 2,000" is displayed as a target value. This indicates that it is desirable for the user who gives the label to give the label to 2,000 partial images.
  • the display area N11 the actual value of the number of partial images to which the label has been given is displayed. This allows the user to recognize that an additional 1,000 partial images need to be labeled.
  • the plurality of partial images are divided from a reference point (for example, the upper left pixel) in the pathological image at predetermined intervals in the right direction and the downward direction (for example, 300 pixel intervals in the right direction and 300 pixel intervals in the downward direction). It may be an image generated by the above.
  • the plurality of partial images are not limited to this, and the points deviated by a predetermined distance from the reference point in the pathological image are spaced apart by a predetermined distance in the left-right direction and the up-down direction (for example, an interval of 300 pixels in the right-left direction and an interval of 300 pixels in the up-down direction). It may be an image generated by dividing by (etc.).
  • the pathological image is divided in the right direction and the downward direction at predetermined intervals based on the points (pixels) shifted to the right and / or downward by a predetermined distance from the reference point (upper left image) in the pathological image.
  • the image may be generated by the above.
  • the offset value designation area M12 is an area for designating how many pixels the reference point in the pathological image is shifted to the right.
  • the offset value designation area M13 is an area for designating how many pixels the reference point in the pathological image is shifted downward.
  • the partial image P1 shows the partial image located at the upper left of the pathological image when the partial image is generated by dividing the pathological image in the right direction and the downward direction at predetermined intervals with reference to the upper left of the pathological image.
  • the image P6 shows a partial image to the right of the partial image P1.
  • 50 pixels and 0 pixels are input to the offset value designation areas M12 and M13 in FIG. 5, respectively.
  • the partial image P2 is generated based on the point shifted by 50 pixels from the upper left to the right of the pathological image.
  • 100 pixels and 0 pixels are input to the offset value designation areas M12 and M13 in FIG. 5, respectively.
  • the partial image P3 is generated based on the point shifted by 100 pixels from the upper left to the right of the pathological image.
  • the data generation device 10 divides the image into a plurality of partial images and displays them, and accepts a label input from the user for each partial image. This makes it possible to more easily generate learning data related to images.
  • the data generation device 10 changes the pixel values related to the colors of the plurality of pathological images according to the method of changing the pixel values determined according to the image types corresponding to the plurality of images.
  • the color of a plurality of images can be changed to a more appropriate color suitable for learning the learning model according to the image type, and a learning model with higher recognition accuracy can be generated. ..
  • the data generation device 10 displays a target value and an actual value for the ratio of each type of label given to each partial image.
  • the user can label each partial image so that the actual value approaches the target value, so that the learning data for generating the learning model with higher recognition accuracy can be efficiently generated. It will be possible to do.
  • the data generation device 10 makes it possible to divide the image into partial images based on arbitrary points (pixels) on the image. As a result, after labeling, the user repeats the work of shifting the reference point when dividing the image into partial images and performing the labeling again, so that the number of input images is small. Can also generate a large number of training data.

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PCT/JP2021/014494 2020-04-06 2021-04-05 データ生成装置、データ生成方法及びプログラム Ceased WO2021206053A1 (ja)

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KR1020227038232A KR20220164755A (ko) 2020-04-06 2021-04-05 데이터 생성 장치, 데이터 생성 방법 및 프로그램
EP21785651.7A EP4134909A4 (en) 2020-04-06 2021-04-05 DATA GENERATION DEVICE, DATA GENERATION METHOD AND PROGRAM
CN202180024507.9A CN115380307A (zh) 2020-04-06 2021-04-05 数据生成装置、数据生成方法及程序
US17/917,542 US12387339B2 (en) 2020-04-06 2021-04-05 Data generation apparatus, data generation method, and program
JP2022514063A JP7236202B2 (ja) 2020-04-06 2021-04-05 データ生成装置、データ生成方法及びプログラム
JP2023025993A JP7642002B2 (ja) 2020-04-06 2023-02-22 データ生成装置、データ生成方法及びプログラム

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024247991A1 (ja) 2023-05-31 2024-12-05 デンカ株式会社 プログラム、支援方法及びシステム
WO2024247990A1 (ja) * 2023-05-31 2024-12-05 デンカ株式会社 プログラム、生成方法及びシステム

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