WO2021031459A1 - 适用于内窥镜的图像增强方法、装置和存储介质 - Google Patents
适用于内窥镜的图像增强方法、装置和存储介质 Download PDFInfo
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- 238000004590 computer program Methods 0.000 claims description 26
- 238000006243 chemical reaction Methods 0.000 claims description 8
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- 230000009466 transformation Effects 0.000 claims description 4
- 238000013507 mapping Methods 0.000 claims description 2
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- 238000010586 diagram Methods 0.000 description 5
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- G06T5/92—Dynamic range modification of images or parts thereof based on global image properties
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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
- G06T2207/10068—Endoscopic image
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- the present invention relates to the technical field of medical devices, in particular to an image enhancement method, device and storage medium suitable for endoscopes.
- Endoscope is a commonly used medical device, which integrates traditional optics, ergonomics, precision machinery, modern electronics, mathematics, and software. It is widely used in non-invasive and minimally invasive surgery.
- the details of the image collected by the endoscope are not ideal, and the usually obtained medical images may There are phenomena such as unclear details and low contrast, which will affect the safety and effectiveness of diagnosis and treatment. Therefore, letting the images collected by the endoscope show clearer texture details is the focus of the endoscope in terms of optical performance.
- the image collected by the endoscope is generally enhanced globally to increase the contrast of the entire image, thereby improving the visibility of the details of the entire image.
- the inventor found in the process of implementing the present invention that when a doctor observes a medical image, he observes the lesion area of the image.
- the global enhancement method cannot effectively enhance the local texture and details, it can only enhance The global contrast enhances the visual effect on the whole, so the enhancement effect and the visibility of details in the area to be observed are low.
- the embodiments of the present invention provide an image enhancement method, device and storage medium suitable for an endoscope, which can locally enhance the target area in the video image collected by the endoscope, thereby improving the target area in the video image. Enhancement effect and visibility of details.
- an embodiment of the present invention provides an image enhancement method suitable for an endoscope, including:
- the method before performing the gray level equalization processing on the pixels whose gray values are in the first interval in the gray level image, the method further includes:
- the gray-scale value transformation of pixels in the gray-scale image that meet the first preset condition is specifically:
- the gray-scale value conversion of pixels in the gray-scale image that meet the second preset condition is specifically:
- the method further includes:
- the two end values of the first interval are respectively equal to the second minimum gray value and the second maximum gray value.
- the gray-level equalization process is performed on the pixels whose gray-level values are in the first interval in the gray-level image to obtain and display the enhanced gray-level image, which specifically includes:
- the enhanced grayscale image is displayed.
- the method further includes:
- a geometric figure is drawn and displayed on the display screen of the endoscope.
- an embodiment of the present invention also provides an image enhancement device suitable for an endoscope, including:
- the response module is configured to respond to the image enhancement start instruction, convert the current frame image collected in real time by the camera of the endoscope into a grayscale image, and obtain the grayscale values of all pixels in the grayscale image;
- the first obtaining module is configured to obtain the target area information input by the user, and determine the target area of the gray scale image according to the target area information;
- the second obtaining module is used to obtain the minimum gray value and the maximum gray value in the target area of the gray image, and record them as the first minimum gray value and the first maximum gray value respectively;
- the image enhancement module is used to perform gray-scale equalization processing on the pixels whose gray-scale values are in the first interval in the gray-scale image to obtain and display the enhanced gray-scale image; wherein, the first interval is based on the The first grayscale minimum value and the first grayscale maximum value are divided.
- an embodiment of the present invention also provides an image enhancement device suitable for an endoscope, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor.
- the processor executes the computer program, the image enhancement method suitable for endoscopes as described in any one of the above is implemented.
- an embodiment of the present invention also provides a computer-readable storage medium, the computer-readable storage medium includes a stored computer program, wherein the device where the computer-readable storage medium is located is controlled when the computer program is running Perform the image enhancement method suitable for endoscopes as described in any of the above.
- the embodiment of the present invention provides an image enhancement method, device, and storage medium suitable for an endoscope.
- the current frame collected by the camera of the endoscope is collected in real time.
- the image is converted into a grayscale image, and the grayscale values of all pixels in the grayscale image are obtained; then, the target area information input by the user is obtained, and the target area of the grayscale image is determined according to the target area information; then Obtain the minimum gray value and maximum gray value in the target area of the gray image, and record them as the first minimum gray value and the first maximum gray value respectively;
- the pixels whose values are in the first interval divided according to the first gray-scale minimum value and the first gray-scale maximum value are subjected to gray-scale equalization processing to obtain and display an enhanced gray-scale image, thereby realizing real-time internal
- the video images collected by the speculum are enhanced.
- the embodiment of the present invention obtains and displays an enhanced grayscale image by performing grayscale equalization processing on pixels whose grayscale values are in the first interval in the grayscale image, so the processing range of grayscale equalization can be reduced.
- Locally increase the grayscale contrast in the grayscale image which can more closely highlight the detail layering in the target area, so as to realize the local enhancement of the target area that needs to be observed in the video image collected by the endoscope.
- the enhancement effect and detail visibility of the target area in the video image solves the problem that in the prior art the global enhancement method can only enhance the global contrast and visual effect, the enhancement effect and detail visibility of the area that needs to be observed is low.
- the pixels in the first interval in the non-target area of the grayscale image are also subjected to grayscale equalization. Therefore, the processing of the non-target area in the grayscale image is not completely removed, which effectively avoids the enhancement
- the gray image has abrupt gray changes.
- FIG. 1 is a schematic flowchart of an embodiment of an image enhancement method suitable for an endoscope provided by the present invention.
- Fig. 2 is a schematic partial flowchart of an embodiment of an image enhancement method suitable for an endoscope provided by the present invention.
- Fig. 3 is a schematic partial flowchart of an embodiment of an image enhancement method suitable for an endoscope provided by the present invention.
- Fig. 4 is a schematic structural diagram of an embodiment of an image intensifier suitable for an endoscope provided by the present invention.
- Fig. 5 is a schematic structural diagram of another embodiment of an image intensifier suitable for an endoscope provided by the present invention.
- FIG. 1 is a schematic flowchart of an embodiment of an image enhancement method suitable for an endoscope provided by the present invention.
- the embodiment of the present invention provides an image enhancement method suitable for an endoscope, including steps S10 to S40, which are specifically as follows:
- the current frame image collected by the camera of the endoscope is grayed out in real time to obtain the grayscale image of the current frame image, and obtain the grayscale of all pixels in the grayscale image value.
- the user can select the area to be observed in the grayscale image through an input device such as a touch screen or a mouse, thereby inputting target area information.
- the determined target area of the grayscale image is the target area that the user needs to observe.
- the first interval is divided according to the first gray-scale minimum value and the first gray-scale maximum value, and then the gray value in the grayscale image is in the first interval.
- Pixels in one interval are subjected to gray level equalization processing, so that the probability density of gray in the first interval is uniformly distributed, thereby obtaining an enhanced gray image, and displaying the enhanced gray image, thereby realizing partial
- the enhancement processing of the target area that needs to be observed in the image collected by the endoscope can effectively improve the enhancement effect of the target area in the image and the visibility of details.
- steps S50 to S60 are further included, which are specifically as follows:
- S50 Perform grayscale value conversion on pixels in the grayscale image that meet a first preset condition; wherein the first preset condition is that the grayscale value is greater than or equal to the first grayscale maximum value.
- S60 Perform grayscale value conversion on pixels in the grayscale image that meet a second preset condition; wherein the second preset condition is that the grayscale value is less than or equal to the first grayscale minimum value.
- the grayscale value of the pixels whose grayscale value is greater than or equal to the first grayscale maximum value and the pixels whose grayscale value is less than or equal to the first grayscale minimum value in the grayscale image are transformed to further enhance The contrast of the gray image to make the display effect of the enhanced gray image more clear.
- step S50 is specifically:
- the preset value is 255.
- step S60 is specifically:
- steps S70 to S90 are further included, which are specifically as follows:
- the two end values of the first interval are respectively equal to the second minimum gray value and the second maximum gray value.
- steps S50 to S60 perform the grayscale value on the pixels whose grayscale value is greater than or equal to the first grayscale maximum value in the grayscale image and the pixels whose grayscale value is less than or equal to the first grayscale minimum value. Therefore, the second gray-scale minimum value and the second gray-scale maximum value are calculated by re-obtaining the gray values of all pixels in the gray-scale image to re-determine the two end values of the first interval.
- the foregoing step S40 specifically includes steps S41 to S46:
- S42 Calculate the probability distribution of each gray value according to the number of pixels corresponding to each gray value and the total number of pixels in the gray image.
- the number of pixels in the grayscale image corresponding to each grayscale value in the first interval and the total number of pixels in the grayscale image are obtained, and the probability distribution of each grayscale value is calculated .
- the cumulative distribution probability of each gray value is calculated, and then according to the cumulative distribution probability of each gray value, the equalized corresponding to each gray value can be calculated Gray value, and then map the equalized gray value corresponding to each gray value to its corresponding pixel in the gray image, so that the probability density of the gray in the first interval is uniformly distributed, improving The contrast of the target area, thereby obtaining an enhanced grayscale image, and displaying the enhanced grayscale image.
- the method further includes:
- a geometric figure is drawn and displayed on the display screen of the endoscope.
- geometric figures are drawn and displayed on the display screen of the endoscope, thereby marking the target area, so that the user can quickly find the target area to be observed when observing the image.
- the image enhancement method suitable for endoscopes is to obtain and display the enhanced gray scale by performing gray-scale equalization processing on the pixels whose gray-scale value is in the first interval in the gray-scale image. Therefore, the processing range of gray level equalization can be reduced, the gray contrast in the gray image can be improved locally, and the detailed layering in the target area can be highlighted in more detail, so as to realize the video captured by the endoscope locally.
- the target area that needs to be observed in the image is enhanced, which improves the enhancement effect and the visibility of the details of the target area in the video image, and solves the need for observation in the prior art because the global enhancement method can only enhance the global contrast and visual effects.
- the enhancement effect of the area of the grayscale and the problem of low visibility of details, and the pixels in the first interval in the non-target area of the grayscale image are also grayscale equalized, so the grayscale image is not completely removed
- the processing of the non-target area effectively avoids sudden gray changes in the enhanced gray image.
- the embodiment of the present invention also provides an image enhancement device suitable for an endoscope, which can implement all the processes of the image enhancement method suitable for an endoscope.
- FIG. 4 is a schematic structural diagram of an embodiment of an image intensifier suitable for an endoscope provided by the present invention.
- the response module 21 is configured to respond to the image enhancement start instruction, convert the current frame image collected in real time by the camera of the endoscope into a grayscale image, and obtain the grayscale values of all pixels in the grayscale image;
- the first obtaining module 22 is configured to obtain the target area information input by the user, and determine the target area of the gray scale image according to the target area information;
- the second acquisition module 23 is configured to acquire the minimum gray value and the maximum gray value in the target area of the gray image, and record them as the first minimum gray value and the first maximum gray value respectively;
- the image enhancement module 24 is configured to perform grayscale equalization processing on the pixels whose grayscale values are in the first interval in the grayscale image to obtain and display an enhanced grayscale image; wherein, the first interval is based on The first grayscale minimum value and the first grayscale maximum value are divided.
- the image enhancement device suitable for endoscopes obtained by the embodiment of the present invention obtains and displays the enhanced gray scale by performing gray-scale equalization processing on pixels whose gray-scale values are in the first interval in the gray-scale image. Therefore, the processing range of gray level equalization can be reduced, the gray contrast in the gray image can be improved locally, and the detailed layering in the target area can be highlighted in more detail, so as to realize the video captured by the endoscope locally.
- the target area that needs to be observed in the image is enhanced, which improves the enhancement effect and the visibility of the details of the target area in the video image, and solves the need for observation in the prior art because the global enhancement method can only enhance the global contrast and visual effects.
- the enhancement effect of the area of the grayscale and the problem of low visibility of details, and the pixels in the first interval in the non-target area of the grayscale image are also grayscale equalized, so the grayscale image is not completely removed
- the processing of the non-target area effectively avoids sudden gray changes in the enhanced gray image.
- FIG. 5 is a schematic structural diagram of another embodiment of an image intensifier suitable for an endoscope provided by the present invention.
- An image enhancement device suitable for an endoscope provided by an embodiment of the present invention includes a processor 31, a memory 32, and a computer program stored in the memory and configured to be executed by the processor 31.
- the processing The device 31 implements the image enhancement method suitable for endoscopes as described in any of the above embodiments when the computer program is executed.
- the embodiment of the present invention also provides a computer-readable storage medium, the computer-readable storage medium includes a stored computer program, wherein, when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute The image enhancement method suitable for endoscopes as described in any of the above embodiments.
- the steps in each embodiment of the image enhancement method suitable for endoscopes are implemented, for example, all the steps of the image enhancement method suitable for endoscopes shown in FIG. 1.
- the functions of the modules/units in the embodiments of the image intensifier suitable for endoscopes are implemented, for example, the image intensifier suitable for endoscopes shown in FIG. 4 The function of each module.
- the computer program may be divided into one or more modules, and the one or more modules are stored in the memory 32 and executed by the processor 31 to complete the present invention.
- the one or more modules may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program in the image intensifying device suitable for endoscopes.
- the computer program can be divided into a response module, a first acquisition module, a second acquisition module, and an image enhancement module.
- each module is used to respond to the image enhancement start instruction, and the endoscope
- the current frame image collected by the camera in real time is converted into a grayscale image, and the grayscale value of all pixels in the grayscale image is obtained
- the first obtaining module is used to obtain the target area information input by the user, and according to the target area information Determine the target area of the grayscale image
- the second acquisition module is used to acquire the minimum grayscale value and the maximum grayscale value in the target area of the grayscale image, and record them as the first minimum grayscale value and the A grayscale maximum value
- an image enhancement module for performing grayscale equalization processing on pixels whose grayscale values are in the first interval in the grayscale image to obtain and display an enhanced grayscale image; wherein, the The first interval is divided according to the first gray-scale minimum value and the first gray-scale maximum value.
- the image enhancement device suitable for endoscopes may be computing devices such as desktop computers, notebooks, palmtop computers, and cloud servers.
- the image enhancement device suitable for an endoscope may include, but is not limited to, a processor 31 and a memory 32.
- a processor 31 and a memory 32 may be included in the image enhancement device suitable for endoscopes.
- the schematic diagram is only an example of an image intensifier suitable for an endoscope, and does not constitute a limitation on an image intensifier suitable for an endoscope, and may include more or less than that shown in the figure.
- the image enhancement device suitable for endoscopes may also include input and output devices, network access devices, buses, etc., or a combination of some components, or different components.
- the so-called processor 31 may be a central processing unit (Central Processing Unit, CPU), other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), Ready-made programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
- the general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.
- the processor 31 is the control center of the image intensifying device suitable for endoscopes, and is connected by various interfaces and lines. The whole is applicable to all parts of the image intensifying device of the endoscope.
- the memory 32 may be used to store the computer program and/or module, and the processor 31 runs or executes the computer program and/or module stored in the memory 32, and calls data stored in the memory 32,
- the various functions of the image intensifier suitable for endoscopes are realized.
- the memory 32 may mainly include a program storage area and a data storage area.
- the program storage area may store an operating system, an application program required by at least one function (such as a sound playback function, an image playback function, etc.), etc.; Store data (such as audio data, phone book, etc.) created based on the use of mobile phones.
- the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disks, memory, plug-in hard disks, smart media cards (SMC), and secure digital (SD) cards , Flash Card, at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.
- non-volatile memory such as hard disks, memory, plug-in hard disks, smart media cards (SMC), and secure digital (SD) cards , Flash Card, at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.
- the integrated module/unit of the image enhancement device suitable for endoscope is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
- the present invention implements all or part of the processes in the above-mentioned embodiments and methods, and can also be completed by instructing relevant hardware through a computer program.
- the computer program can be stored in a computer-readable storage medium. When the program is executed by the processor, the steps of the foregoing method embodiments can be implemented.
- the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file, or some intermediate forms.
- the computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory) , Random Access Memory (RAM, Random Access Memory), electrical carrier signal, telecommunications signal, and software distribution media, etc.
- the device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physically separate. Units can be located in one place or distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
- the connection relationship between the modules indicates that they have a communication connection, which can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art can understand and implement it without creative work.
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Abstract
Description
Claims (10)
- 一种适用于内窥镜的图像增强方法,其特征在于,包括:响应于图像增强启动指令,将由内窥镜的摄像头实时采集的当前帧图像转换为灰度图,并获取所述灰度图内所有像素的灰度值;获取用户输入的目标区域信息,并根据所述目标区域信息确定所述灰度图的目标区域;获取所述灰度图的目标区域内的灰度最小值和灰度最大值,并分别记录为第一灰度最小值和第一灰度最大值;对所述灰度图中灰度值处于第一区间内的像素进行灰度均衡化处理,得到并显示增强后的灰度图;其中,所述第一区间是根据所述第一灰度最小值和所述第一灰度最大值划分的。
- 如权利要求1所述的适用于内窥镜的图像增强方法,其特征在于,所述对所述灰度图中灰度值处于第一区间内的像素进行灰度均衡化处理前,还包括:对所述灰度图中满足第一预设条件的像素进行灰度值变换;其中,所述第一预设条件为灰度值大于或等于所述第一灰度最大值;对所述灰度图中满足第二预设条件的像素进行灰度值变换;其中,所述第二预设条件为灰度值小于或等于所述第一灰度最小值。
- 如权利要求2所述的适用于内窥镜的图像增强方法,其特征在于,所述对所述灰度图中满足第一预设条件的像素进行灰度值变换,具体为:将所述灰度图中满足第一预设条件的像素的灰度值,修改为其原灰度值与预设值之和的一半。
- 如权利要求2或3所述的适用于内窥镜的图像增强方法,其特征在于, 所述对所述灰度图中满足第二预设条件的像素进行灰度值变换,具体为:将所述灰度图中满足第二预设条件的像素的灰度值,修改为其原灰度值的一半。
- 如权利要求2所述的适用于内窥镜的图像增强方法,其特征在于,所述对所述灰度图中满足第二预设条件的像素进行灰度值变换后,还包括:重新获取所述灰度图内所有像素的灰度值;计算所述灰度图内所有像素的灰度值中大于所述第一灰度最大值的最小值,作为第二灰度最大值;计算所述灰度图内所有像素的灰度值中小于所述第一灰度最小值的最大值,作为第二灰度最小值;则,所述第一区间的两个端值分别等于所述第二灰度最小值和所述第二灰度最大值。
- 如权利要求1所述的适用于内窥镜的图像增强方法,其特征在于,所述对所述灰度图中灰度值处于第一区间内的像素进行灰度均衡化处理,得到并显示增强后的灰度图,具体包括:获取所述第一区间内的每一灰度值在所述灰度图中对应的像素个数,及所述灰度图的总像素个数;根据所述每一灰度值对应的像素个数和所述灰度图的总像素个数,计算所述每一灰度值的概率分布;根据所述每一灰度值的概率分布,计算所述每一灰度值的累积分布概率;根据所述每一灰度值的累积分布概率,计算所述每一灰度值对应的均衡化后的灰度值;将所述每一灰度值对应的均衡化后的灰度值映射至其对应的像素上,得到增强后的灰度图;显示所述增强后的灰度图。
- 如权利要求1所述的适用于内窥镜的图像增强方法,其特征在于,所述根据所述目标区域信息确定所述灰度图的目标区域后,还包括:根据所述目标区域信息,在所述内窥镜的显示屏中绘制并显示几何图形。
- 一种适用于内窥镜的图像增强装置,其特征在于,包括:响应模块,用于响应于图像增强启动指令,将由内窥镜的摄像头实时采集的当前帧图像转换为灰度图,并获取所述灰度图内所有像素的灰度值;第一获取模块,用于获取用户输入的目标区域信息,并根据所述目标区域信息确定所述灰度图的目标区域;第二获取模块,用于获取所述灰度图的目标区域内的灰度最小值和灰度最大值,并分别记录为第一灰度最小值和第一灰度最大值;图像增强模块,用于对所述灰度图中灰度值处于第一区间内的像素进行灰度均衡化处理,得到并显示增强后的灰度图;其中,所述第一区间是根据所述第一灰度最小值和所述第一灰度最大值划分的。
- 一种适用于内窥镜的图像增强装置,包括处理器、存储器以及存储在所述存储器中且被配置为由所述处理器执行的计算机程序,所述处理器执行所述计算机程序时实现如权利要求1-7中任一项所述的适用于内窥镜的图像增强方法。
- 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质包括存储的计算机程序,其中,在所述计算机程序运行时控制所述计算机可读存储介质所在设备执行如权利要求1-7中任一项所述的适用于内窥镜的图像增强方法。
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