WO2019057067A1 - 图像质量评估方法及装置 - Google Patents
图像质量评估方法及装置 Download PDFInfo
- Publication number
- WO2019057067A1 WO2019057067A1 PCT/CN2018/106451 CN2018106451W WO2019057067A1 WO 2019057067 A1 WO2019057067 A1 WO 2019057067A1 CN 2018106451 W CN2018106451 W CN 2018106451W WO 2019057067 A1 WO2019057067 A1 WO 2019057067A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- image
- quality evaluation
- target area
- quality assessment
- evaluated
- Prior art date
Links
- 238000013441 quality evaluation Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 238000011156 evaluation Methods 0.000 claims abstract description 12
- 238000001303 quality assessment method Methods 0.000 claims description 104
- 238000000605 extraction Methods 0.000 claims description 10
- 238000005260 corrosion Methods 0.000 claims description 9
- 230000007797 corrosion Effects 0.000 claims description 9
- 238000012549 training Methods 0.000 claims description 8
- 238000012935 Averaging Methods 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 239000002131 composite material Substances 0.000 description 3
- 238000002372 labelling Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000013527 convolutional neural network Methods 0.000 description 2
- 238000013135 deep learning Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000010801 machine learning Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007430 reference method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/20—Image enhancement or restoration using local operators
- G06T5/30—Erosion or dilatation, e.g. thinning
-
- 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/25—Determination of region of interest [ROI] or a volume of interest [VOI]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/28—Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/40—Extraction of image or video features
- G06V10/44—Local feature extraction by analysis of parts of the pattern, e.g. by detecting edges, contours, loops, corners, strokes or intersections; Connectivity analysis, e.g. of connected components
-
- 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
- G06T2207/10004—Still image; Photographic image
-
- 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
- G06T2207/20092—Interactive image processing based on input by user
- G06T2207/20104—Interactive definition of region of interest [ROI]
-
- 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
- G06T2207/30168—Image quality inspection
Definitions
- the present invention relates to the field of digital image processing technologies, and in particular, to an image quality evaluation method and apparatus.
- the current image quality assessment method is basically based on processing the entire image to obtain its corresponding quality index.
- the quality assessment of computers in this way does not really reflect the process of human vision.
- the human eye vision system implements autofocus when evaluating surrounding scenes. This focusing process is equivalent to finding the target area of real interest, that is, target detection.
- the quality of the region of interest (ROI) in the image is more meaningful for practical applications.
- the present invention is directed to the above problems, and proposes an image quality evaluation method and apparatus.
- An aspect of the present invention provides an image quality evaluation method, the method comprising: performing quality assessment separately on at least one target region in an image to be evaluated to determine a quality assessment result of the at least one target region; based on the determined Determining a quality assessment result of the at least one target area, and performing quality assessment on the image to be evaluated.
- the method further comprises: performing target detection on the image to be evaluated to determine the at least one target area.
- the method for performing target detection on the image to be evaluated includes any one of the following methods: based on a traditional feature extraction method and a depth feature extraction method.
- the step of performing target detection on the image to be evaluated comprises: classifying a contour of the binarized image obtained from the image to be evaluated to determine a text outline; based on the determined text contour, The text is merged in a specified direction to determine the at least one target area.
- the contour of the binarized image is classified based on parameters determined by at least one of: determining a number of non-zero pixels within a contour of the binarized image; determining the two And an aspect ratio and an aspect ratio of the contour of the image; determining a number of similar width contours and a number of similar height contours present within a specified direction neighborhood within a specified direction range of the contour of the binarized image.
- the step of merging the text in the specified direction based on the determined text outline comprises: expanding the determined text outline in a specified direction by setting an expansion operator and a corrosion operator and Corrosion operation.
- the step of separately performing quality assessment on at least one target region in the image to be evaluated comprises: determining a quality assessment of the at least one target region based on the determined at least one target region and an image quality assessment model result.
- the step of determining a quality assessment result of the at least one target region based on the determined at least one target region and image quality assessment model comprises: determining an image quality assessment model using a depth learning based training method And determining a quality assessment result of the at least one target area based on the determined at least one target area and the image quality assessment model.
- the step of separately performing quality assessment on the at least one target region comprises performing quality assessment on the at least one target region based on statistics on pixel grayscale values.
- the step of performing quality assessment on the image to be evaluated based on the determined quality assessment result of the at least one target region comprises: based on the determined at least one by mass weighted averaging The quality assessment result of the target area is used to perform quality assessment on the image to be evaluated.
- the step of separately performing quality assessment on the at least one target area to determine a quality assessment result of the at least one target area comprises: using a non-reference quality evaluation indicator, respectively, for the at least one target area Performing a quality assessment to determine a quality assessment result of the at least one target area, wherein the no-reference quality evaluation indicator includes at least one of an edge intensity, a noise rate, or a uniform brightness distribution.
- Another aspect of the present invention provides an image quality evaluation apparatus, the apparatus comprising: a target area quality evaluation unit configured to perform quality evaluation separately on at least one target area in an image to be evaluated to determine the at least one target area a quality evaluation result; the image quality evaluation unit to be evaluated is configured to perform quality evaluation on the image to be evaluated based on the determined quality evaluation result of the at least one target area.
- the apparatus further includes: a target detecting unit configured to perform target detection on the image to be evaluated to determine the at least one target area.
- the method for performing target detection on the image to be evaluated by the target detecting unit includes any one of the following methods: based on a traditional feature extraction method and a depth feature extraction method.
- the target detecting unit includes: a contour classifying unit configured to classify an outline of the binarized image obtained from the image to be evaluated to determine a text outline; and a text merging unit configured to The text is merged in a specified direction based on the determined text outline to determine the at least one target area.
- the contour classification unit is further configured to: classify a contour of the binarized image based on parameters determined by at least one of: determining a contour within the contour of the binarized image a non-zero pixel number; determining an aspect ratio and an aspect ratio of the contour of the binarized image; and determining a similar width existing within a specified direction neighborhood within a specified direction range of the contour of the binarized image The number of contours and the number of similar height contours.
- the text merging unit is further configured to perform an expansion operation and a etch operation on the determined text contour in a specified direction by setting an expansion operator and a corrosion operator.
- the target area quality evaluation unit is further configured to determine a quality assessment result of the at least one target area based on the determined at least one target area and an image quality assessment model.
- the target area quality evaluation unit is further configured to: determine an image quality evaluation model by using a depth learning based training method, and based on the determined at least one target area and the image quality evaluation model Determining a quality assessment result of the at least one target area.
- the target area quality evaluation unit is further configured to perform quality assessment on the at least one target area based on statistics on pixel gray values.
- the image quality evaluation unit to be evaluated is further configured to: perform quality on the image to be evaluated based on the determined quality evaluation result of the at least one target region by means of quality weighted averaging Evaluation.
- the target area quality evaluation unit is further configured to perform quality assessment on the at least one target area separately using a non-reference quality evaluation indicator to determine a quality assessment result of the at least one target area.
- the non-reference quality evaluation indicator includes at least one of an edge intensity, a noise rate, or a uniform brightness distribution.
- Another aspect of the present invention also provides a computer device including a memory, a processor, and a computer program stored on the memory by the processor, the processor executing the computer program to implement any of the above The method described in the item.
- Another aspect of the present invention also provides a computer storage medium having stored thereon a processor executable program that, when executed by the processor, implements the method of any of the above.
- the image quality evaluation method provided by the invention makes the image quality evaluation process focus on the target region of interest and ignore the image quality of the insignificant region, thereby realizing the quality evaluation of the image to be evaluated, the evaluation speed is fast, the evaluation accuracy is high, and the objective The quality of the image to be evaluated is effectively evaluated so that the quality assessment results are as consistent as possible with the perception of the human eye.
- FIG. 1 is a flow chart of an image quality evaluation method according to an embodiment of the present invention.
- FIG. 2 is a flow chart of another method of image quality assessment in accordance with an embodiment of the present invention.
- FIG. 3 is a flow chart of a text image quality assessment method in accordance with an embodiment of the present invention.
- FIG. 4 is an illustration of a text image in accordance with an embodiment of the present invention.
- Figure 5 is a binarized image of the text image of Figure 4.
- FIG. 6 is a schematic diagram of a text line area obtained after performing target detection in FIG. 4.
- FIG. 6 is a schematic diagram of a text line area obtained after performing target detection in FIG. 4.
- FIG. 7 is a schematic diagram of a composite image of an image quality assessment model in accordance with an embodiment of the present invention.
- FIG. 8 is an evaluation result of the text image of FIG. 4.
- FIG 9 is an illustration of another text image in accordance with an embodiment of the present invention.
- Figure 10 is a binarized image of the text image of Figure 9.
- FIG. 11 is a schematic diagram of a text line area obtained after performing target detection in FIG. 9.
- FIG. 11 is a schematic diagram of a text line area obtained after performing target detection in FIG. 9.
- Figure 12 is a result of evaluation of the text image of Figure 9.
- Figure 13 is a schematic diagram of an image quality evaluation apparatus according to an embodiment of the present invention.
- FIG. 1 is a flow chart of an image quality evaluation method according to an embodiment of the present invention.
- S101 Perform quality assessment on at least one target area in the image to be evaluated to determine a quality assessment result of each target area in the at least one target area;
- S102 Perform quality assessment on the image to be evaluated based on the determined quality assessment result of each target region of the at least one target region.
- the manner of determining the target area may be preset, or may be performed before each evaluation.
- FIG. 2 is a flow chart of another method of image quality assessment in accordance with an embodiment of the present invention.
- the present invention provides a quality assessment method that includes the steps shown in Figure 1:
- S201 Perform target detection on the image to be evaluated to determine at least one target area
- S202 Perform quality assessment on the at least one target area separately to determine a quality assessment result of each target area in the at least one target area;
- S203 Perform quality assessment on the image to be evaluated based on the determined quality assessment result of each target region of the at least one target region.
- the image to be evaluated may be subjected to target detection based on traditional feature extraction method, target detection based on depth feature extraction method (such as CTPN method, Haar classifier, Fater-rcnn), etc., wherein the image to be evaluated may include any object, for example, Animals, faces, food, cars or text lines, etc.
- the image to be evaluated herein may be a color image or a grayscale image.
- the result returned after the target detection is a plurality of target regions of interest, which are saved as images.
- the quality assessment uses non-reference quality evaluation indicators, including edge strength, noise rate or uniform brightness distribution.
- a machine learning-based approach can be used to train the quality assessment model prior to quality assessment for quality assessment of the input image to be evaluated.
- Model training needs to collect various target area images in advance, and perform quality labeling.
- the size of the mass labeling is represented by an integer ranging from 0 to 100. The larger the labeling value, the better the corresponding image quality. It should be understood that it can also be used. Other suitable ways to define the size of the quality annotation.
- model training employs a deep learning (Convolutional Neural Network CNN) based training method to determine a higher accuracy image quality model.
- weighted average is performed on the quality assessment result of each target quality region in the at least one target region.
- the method can respectively assign weights according to the importance of each target area, and the importance of the target area depends on the size and definition of the target area, the degree of interest in the target area, and the like.
- the weighted average manner evolves into the arithmetic mean of the quality assessment results for the respective target regions.
- FIG. 3 is a flow chart of a text image quality evaluation method according to the present invention. As shown in FIG. 2, the method includes the following steps:
- the image to be evaluated is a text image (for example, as shown in FIG. 4 or FIG. 9), the text line is an object of interest in the image, and the purpose of target detection of the text line is to detect the position of the text line in the image. .
- step S303 If the image to be evaluated is a color image, step S303 is performed, otherwise skip S303 to perform step S304;
- step S302 when the input image to be evaluated is a grayscale image (for example, as shown in FIG. 4 and FIG. 9), the image to be evaluated is the grayscale image to be processed, and after step S302 is performed, the process proceeds directly to step S303.
- step S304 the image to be evaluated is binarized; when the image to be evaluated is a color image, the image to be evaluated is an image subjected to gradation processing in step S303.
- the local adaptive binarization method is used to perform binarization processing on the grayscale image, that is, the binarization threshold on the pixel position is determined according to the pixel value distribution of the pixel neighborhood, and the grayscale image to be processed is processed. For all pixels, do the following:
- N is between [2, 5];
- the pixel value is compared to the threshold obtained in the previous step. If the pixel value is greater than the threshold, the pixel value is set to 255 in the image, otherwise the pixel value is set to 0 in the image. After binarizing the images of FIGS. 4 and 9, the corresponding binarized images as shown in FIGS. 5 and 10 can be obtained.
- S305 classify all the contours of the binarized image and remove the non-text type contour to determine the outline of the text, and perform the following operations on each contour in the binarized image:
- the contour is considered to be a non-text contour, at a binary value Set the pixel value of all positions in the outline to 0 in the image.
- the first threshold is between [2, 5]
- the second threshold is between [8, 12]
- the third threshold is between [2, 5]
- the fourth threshold is [8, Between 12]
- the fifth threshold is between [2, 5].
- a similar width profile of a profile having a width W and a height H is defined as a profile width ranging between [0.7 W, 1.3 W] and a profile height of a similar height profile being between [0.7H, 1.3H].
- the contour in the binarized image processed in step S305 is subjected to an expansion operation and a etching operation in a horizontal direction (it should be understood that the vertical direction or any suitable direction may also be performed), Get the text line area.
- the expansion operation is to add a boundary to the operation object
- the erosion is to delete some pixels of the object boundary, wherein the definition of the boundary is given by the corresponding operation operator, for example, if the size of the expansion operator is 5 ⁇ 1, The pixel is centered, and pixels in the range of 5 ⁇ 1 are set as target pixels.
- steps S304 and S305 are completed, 20 expansion operations are performed by using an expansion operator with a size of 5 ⁇ 1, and the size is The 5 ⁇ 1 corrosion operator performs 15 etching operations, and the circumscribed rectangle of all the contours is used as a mask to obtain the text line area of the image. It should be understood that in the specific operation, those skilled in the art can expand the expansion operator and expand the expansion operator. The number of operations and the number of corrosions are appropriately adjusted. 6 and 11 are text line areas obtained after the image to be evaluated is completed in step S306.
- S307 Perform quality assessment on the text line area detected in S306.
- an image quality assessment model oriented to the text line region is pre-trained using a deep learning based approach.
- the training text line data can be synthesized by itself, or the annotation can be directly intercepted from the text image.
- the self-synthesized text line first randomly selects the candidate characters from the commonly used Chinese words, English words and common punctuation marks in Chinese and English, and then combines the strings with different background images, adds different degrees of blur, and then compresses them into Different levels of quality and preservation.
- the quality parameter of the composite image the quality of the corresponding image is marked, and the size is between 0 and 100.
- FIG. 7 is a schematic diagram of the composite image.
- the 10 text line regions in FIG. 6 and the 4 text line regions in FIG. 11 are respectively input into the trained image quality evaluation model of the text-oriented line region, and the corresponding text line region quality evaluation result is obtained.
- 8 shows the quality evaluation results of all the text line areas line_1, line_2, line_3, line_4, line_5, line_6, line_7, line_8, line_9, and line_10 of FIG. 6, and
- FIG. 12 shows all the text line areas line_1a, line_2a of FIG.
- the quality assessment results of line_3a and line_4a are respectively input into the trained image quality evaluation model of the text-oriented line region, and the corresponding text line region quality evaluation result is obtained.
- 8 shows the quality evaluation results of all the text line areas line_1, line_2, line_3, line_4, line_5, line_6, line_7, line_8, line_9, and line_10 of FIG. 6, and
- FIG. 12 shows all the text line areas line_1a, line_2a of FIG.
- S308 Perform quality assessment on the image to be evaluated by means of quality weighted average based on the quality assessment result of the text line region obtained in S307;
- the weighting value is determined according to the importance of the target area.
- the importance of the target area is assumed to be the same, so that the weighted average mode is simplified to the arithmetic average mode, and the quality evaluation result of the text image of FIG. 4 is a figure.
- the average value of the quality evaluation results of all the text line areas line_1, line_2, line_3, line_4, line_5, line_6, line_7, line_8, line_9 and line_10 shown in 7 is 16 and the quality evaluation result of the text image of Fig. 9 is the figure.
- the average value of the quality evaluation results of all the text line areas line_1a, line_2a, line_3a, and line_4a shown in 12 is 97.
- the quality evaluation method of the above embodiment is adopted, and the target area of interest is paid attention to, the evaluation speed is fast, the evaluation accuracy is high, the quality of the text image is effectively evaluated, and the text image with different quality is conveniently processed. .
- the flow of quality assessment may also include steps S201, S202, and S203.
- a depth learning based algorithm may be employed in the target detection step.
- the quality of the target area can be evaluated based on the statistics of the gray value of the pixel, for example, using the Laplacian variance algorithm.
- the quality evaluation result based on the target region may be used, and the quality of the image to be evaluated is evaluated by mass weighted average.
- Figure 13 is a schematic diagram of an image quality evaluation apparatus according to an embodiment of the present invention.
- the present invention also provides a quality evaluation device 1200 as shown in FIG. 13, which includes a target detection unit 1201, a target region quality evaluation unit 1202, and an image quality evaluation unit 1203 to be evaluated.
- the target detecting unit 1201 is configured to detect an image to be evaluated to confirm the target area.
- the target area quality evaluating unit 1202 is configured to perform quality evaluation on the target area determined in the target detecting unit 1201 to determine a quality evaluation result of the target area.
- the image quality evaluation unit to be evaluated 1203 is configured to perform quality evaluation on the image to be evaluated based on the quality evaluation result of the target region determined in the target region quality evaluation unit 1202.
- the image quality evaluation unit 1203 to be evaluated may perform quality evaluation on the image to be evaluated by mass weighted average.
- the target detecting unit 1201 includes a contour classifying module 1202a and a text combining module 1202b.
- the contour classification unit 1202a is configured to classify the contour of the binarized image based on parameters determined by at least one of the following operations to determine a text contour: determining a non-zero pixel number nonz within the contour of the binarized image; Determining an aspect ratio hw and an aspect ratio wh of the contour of the binarized image; and determining the number of similar width profiles and similar height profiles present within a specified direction neighborhood within a specified direction range of the contour of the binarized image The number SH.
- the text merging unit 1202b is further configured to perform an expansion operation and a etch operation on the determined text contour in a specified direction by setting an expansion operator and a corrosion operator.
- the text merging unit 1202b is configured to merge the text in a specified direction based on the text outline determined in the contour categorizing unit 1202a to determine the target area.
- the target area quality assessment unit 1202 is further configured to determine a quality assessment result of the target area based on the determined target area and the image quality assessment model.
- the target area quality assessment unit 1202 is further configured to perform quality assessment of the target area based on statistics of pixel grayscale values.
- the flow of the quality assessment method of Figures 1, 2, 3 also represents machine readable instructions comprising a program executed by a processor.
- the program can be embodied in software stored on a tangible computer readable medium such as a CD-ROM, floppy disk, hard disk, digital versatile disk (DVD), Blu-ray disk or other form of memory.
- a tangible computer readable medium such as a CD-ROM, floppy disk, hard disk, digital versatile disk (DVD), Blu-ray disk or other form of memory.
- some or all of the example methods in Figures 1, 2 may utilize an application specific integrated circuit (ASIC), programmable logic device (PLD), field programmable logic device (EPLD), discrete logic, hardware, firmware Any combination of the like is implemented.
- ASIC application specific integrated circuit
- PLD programmable logic device
- EPLD field programmable logic device
- the example processes of Figures 1, 2 can be implemented using coded instructions (such as computer readable instructions) stored on a tangible computer readable medium, such as a hard disk, flash memory, read only memory (ROM), optical disk. (CD), digital versatile disc (DVD), cache, random access memory (RAM), and/or any other storage medium on which information can be stored for any time (eg, long, permanent, transient) Situation, temporary buffering, and/or caching of information).
- a tangible computer readable medium such as a hard disk, flash memory, read only memory (ROM), optical disk. (CD), digital versatile disc (DVD), cache, random access memory (RAM), and/or any other storage medium on which information can be stored for any time (eg, long, permanent, transient) Situation, temporary buffering, and/or caching of information).
- a tangible computer readable medium such as a hard disk, flash memory, read only memory (ROM), optical disk. (CD), digital versatile disc (DVD), cache, random access memory (RAM), and/or any other storage medium on which information
- Figures 1, 2 may be implemented with encoded instructions (such as computer readable instructions) stored on a non-transitory computer readable medium, such as a hard disk, flash memory, read only memory, optical disk, Digital versatile disc, cache, random access memory and/or any other storage medium in which information can be stored at any time (eg, long time, permanently, transient, temporary buffering, and/or caching of information). ).
- a non-transitory computer readable medium such as a hard disk, flash memory, read only memory, optical disk, Digital versatile disc, cache, random access memory and/or any other storage medium in which information can be stored at any time (eg, long time, permanently, transient, temporary buffering, and/or caching of information).
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Quality & Reliability (AREA)
- Image Analysis (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
Description
Claims (24)
- 一种图像质量评估方法,其特征在于,包括:对待评估图像中的至少一个目标区域分别进行质量评估,以确定所述至少一个目标区域的质量评估结果;基于所确定的所述至少一个目标区域中的质量评估结果,对所述待评估图像进行质量评估。
- 根据权利要求1所述的图像质量评估方法,其特征在于,进一步包括:对所述待评估图像进行目标检测,以确定所述至少一个目标区域。
- 根据权利要求2所述的图像质量评估方法,其特征在于,对所述待评估图像进行目标检测的方法包括如下方法中的任一种:基于传统特征提取方式、基于深度特征提取方式。
- 根据权利要求2或3所述的图像质量评估方法,其特征在于,对所述待评估图像进行目标检测的步骤包括:对从所述待评估图像得到的二值化图像的轮廓进行分类,以确定文本轮廓;基于所确定的文本轮廓,在指定方向上对文本进行合并,以确定所述至少一个目标区域。
- 根据权利要求4所述的图像质量评估方法,其特征在于,基于以下至少一个操作所确定的参数来对所述二值化图像的轮廓进行分类:确定所述二值化图像的轮廓内的非零像素个数;确定所述二值化图像的轮廓的高宽比以及宽高比;确定所述二值化图像的轮廓的指定方向范围内的指定方向邻域范围内存在的相似宽度轮廓的数目和相似高度轮廓的数目。
- 根据权利要求4或5所述的图像质量评估方法,其特征在于,基于所确定的文本轮廓,在指定方向上对文本进行合并的步骤包括:通过设置膨胀算子和腐蚀算子,在指定方向上对所确定的文本轮廓进行膨胀操作和腐蚀操作。
- 根据权利要求1至6中任一项所述的图像质量评估方法,其特征在于,对待评估图像中的至少一个目标区域分别进行质量评估的步骤包括:基于所确定的所述至少一个目标区域和图像质量评估模型,确定所述至少一个目标区域的质量评估结果。
- 根据权利要求7所述的图像质量评估方法,其特征在于,基于所确定的所述至少一个目标区域和图像质量评估模型,确定所述至少一个目标区域的质量评估结果的步骤包括:采用基于深度学习的训练方法确定图像质量评估模型,并基于所确定的所述至少一个目标区域和所述图像质量评估模型,确定所述至少一个目标区域的质量评估结果。
- 根据权利要求1至8中任一项所述的图像质量评估方法,其特征在于,对所述至少一个目标区域分别进行质量评估的步骤包括:基于对像素灰度值的统计来对所述至少一个目标区域进行质量评估。
- 根据权利要求1至9中任一项所述的图像质量评估方法,其特征在于,基于所确定的所述至少一个目标区域的质量评估结果,对所述待评估图像进行质量评估的步骤包括:通过质量加权平均的方式,基于所确定的所述至少一个目标区域的质量评估结果,对所述待评估图像进行质量评估。
- 根据权利要求1至10中任一项所述的图像质量评估方法,其特征在于,对所述至少一个目标区域分别进行质量评估,以确定所述至少一个目标区域的质量评估结果的步骤包括:采用无参考质量评价指标,对所述至少一个目标区域分别进行质量评估,以确定所述至少一个目标区域的质量评估结果,其中,所述无参考质量评价指标包括边缘强度、噪声率或统一亮度分布中的至少一个。
- 一种图像质量评估装置,其特征在于,包括:目标区域质量评估单元,被配置为对待评估图像中的至少一个目标区域分别进行质量评估,以确定所述至少一个目标区域的质量评估结果;待评估图像质量评估单元,被配置为基于所确定的所述至少一个目标区域的质量评估结果,对所述待评估图像进行质量评估。
- 根据权利要求12所述的图像质量评估装置,其特征在于,进一步包括:目标检测单元,被配置为对所述待评估图像进行目标检测,以确定所述至少一个目标区域。
- 根据权利要求13所述的图像质量评估装置,其特征在于,所述目标检测单元对所述待评估图像进行目标检测的方法包括如下方法中的任一种:基于传统特征提取方式、基于深度特征提取方式。
- 根据权利要求13或14所述的图像质量评估装置,其特征在于,所述目标检测单元包括:轮廓分类单元,被配置为对从所述待评估图像得到的二值化图像的轮廓进行分类,以确定文本轮廓;文本合并单元,被配置为基于所确定的文本轮廓,在指定方向上对文本进行合并,以确定所述至少一个目标区域。
- 根据权利要求15所述的图像质量评估装置,其特征在于,所述轮廓分类单元还被配置为:基于以下至少一个操作所确定的参数来对所述二值化图像的轮廓进行分类:确定所述二值化图像的轮廓内的非零像素个数;确定所述二值化图像的轮廓的高宽比以及宽高比;确定所述二值化图像的轮廓的指定方向范围内的指定方向邻域范围内存在的相似宽度轮廓的数目和相似高度轮廓的数目。
- 根据权利要求15或16所述的图像质量评估装置,其特征在于,所述文本合并单元还被配置为:通过设置膨胀算子和腐蚀算子,在指定方向上对所确定的文本轮廓进行膨胀操作和腐蚀操作。
- 根据权利要求12至17中任一项所述的图像质量评估装置,其特征在于,所述目标区域质量评估单元还被配置为:基于所确定的所述至少一个目标区域和图像质量评估模型,确定所述至少一个目标区域的质量评估结果。
- 根据权利要求18中任一项所述的图像质量评估装置,其特征在于,所述目标区域质量评估单元还被配置为:采用基于深度学习的训练方法确定图像质量评估模型,并基于所确定的所述至少一个目标区域和所述图像质量评估模型,确定所述至少一个目标区域的质量评估结果。
- 根据权利要求12至19中任一项所述的图像质量评估装置,其特征在于,所述目标区域质量评估单元还被配置为:基于对像素灰度值的统计来对所述至少一个目标区域进行质量评估。
- 根据权利要求12至20中任一项所述的图像质量评估装置,其特征在于,所述待评估图像质量评估单元还被配置为:通过质量加权平均的方式,基于所确定的所述至少一个目标区域的质量评估结果,对所述待评估图像进行质量评估。
- 根据权利要求12至21中任一项所述的图像质量评估装置,其特征在于,所述目标区域质量评估单元还被配置为:采用无参考质量评价指标,对所述至少一个目标区域分别进行质量评估,以确定所述至少一个目标区域的质量评估结果,其中,所述无参考质量评价指标包括边缘强度、噪声率或统一亮度分布中的至少一个。
- 一种计算机设备,包括存储器、处理器以及存储在所述存储器上被所述处理器执行的计算机程序,其特征在于,所述处理器执行所述计算机程序时实现如权利要求1至11中任一项所述的方法。
- 一种计算机存储介质,其上存储有处理器可执行程序,当所述处理器执行所述可执行程序时,实现如上任一项所述的方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SG11201907815V SG11201907815VA (en) | 2017-09-20 | 2018-09-19 | Method for assessing image quality and device thereof |
JP2020504760A JP2020513133A (ja) | 2017-09-20 | 2018-09-19 | 画像品質の評価方法及び装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710854415.9 | 2017-09-20 | ||
CN201710854415.9A CN107481238A (zh) | 2017-09-20 | 2017-09-20 | 图像质量评估方法及装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019057067A1 true WO2019057067A1 (zh) | 2019-03-28 |
Family
ID=60586643
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2018/106451 WO2019057067A1 (zh) | 2017-09-20 | 2018-09-19 | 图像质量评估方法及装置 |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP2020513133A (zh) |
CN (1) | CN107481238A (zh) |
SG (1) | SG11201907815VA (zh) |
WO (1) | WO2019057067A1 (zh) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110232381A (zh) * | 2019-06-19 | 2019-09-13 | 梧州学院 | 车牌分割方法、装置、计算机设备及计算机可读存储介质 |
CN110236544A (zh) * | 2019-05-29 | 2019-09-17 | 中国科学院重庆绿色智能技术研究院 | 基于相关系数的中风灌注成像病变区域检测系统及方法 |
CN111046886A (zh) * | 2019-12-12 | 2020-04-21 | 吉林大学 | 号码牌自动识别方法、装置、设备及计算机可读存储介质 |
CN111275681A (zh) * | 2020-01-19 | 2020-06-12 | 浙江大华技术股份有限公司 | 图片质量的确定方法及装置、存储介质、电子装置 |
CN111696083A (zh) * | 2020-05-20 | 2020-09-22 | 平安科技(深圳)有限公司 | 一种图像处理方法、装置、电子设备及存储介质 |
CN112102309A (zh) * | 2020-09-27 | 2020-12-18 | 中国建设银行股份有限公司 | 一种确定图像质量评估结果的方法、装置及设备 |
CN112287898A (zh) * | 2020-11-26 | 2021-01-29 | 深源恒际科技有限公司 | 一种图像的文本检测质量评价方法及系统 |
CN112365451A (zh) * | 2020-10-23 | 2021-02-12 | 微民保险代理有限公司 | 图像质量等级的确定方法、装置、设备及计算机可读介质 |
CN112767318A (zh) * | 2020-12-31 | 2021-05-07 | 科大讯飞股份有限公司 | 一种图像处理效果的评价方法、装置、存储介质及设备 |
CN112801132A (zh) * | 2020-12-28 | 2021-05-14 | 泰康保险集团股份有限公司 | 一种图像处理方法和装置 |
CN113450323A (zh) * | 2021-06-22 | 2021-09-28 | 深圳盈天下视觉科技有限公司 | 质量检测方法、装置、电子设备及计算机可读存储介质 |
CN113627419A (zh) * | 2020-05-08 | 2021-11-09 | 百度在线网络技术(北京)有限公司 | 兴趣区域评估方法、装置、设备和介质 |
JP2022519469A (ja) * | 2020-01-02 | 2022-03-24 | ▲広▼州大学 | 画像品質評価方法及び装置 |
CN115239961A (zh) * | 2022-09-21 | 2022-10-25 | 江苏跃格智能装备有限公司 | 一种激光切割机工作状态监测方法 |
CN116246273A (zh) * | 2023-03-07 | 2023-06-09 | 广州市易鸿智能装备有限公司 | 图像标注一致性评价方法、装置、电子设备及存储介质 |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107481238A (zh) * | 2017-09-20 | 2017-12-15 | 众安信息技术服务有限公司 | 图像质量评估方法及装置 |
CN108875731B (zh) * | 2017-12-28 | 2022-12-09 | 北京旷视科技有限公司 | 目标识别方法、装置、系统及存储介质 |
CN108122231B (zh) * | 2018-01-10 | 2021-09-24 | 山东华软金盾软件股份有限公司 | 监控视频下基于roi拉普拉斯算法的图像质量评价方法 |
CN111417981A (zh) * | 2018-03-12 | 2020-07-14 | 华为技术有限公司 | 一种图像清晰度检测方法及装置 |
CN108446621A (zh) * | 2018-03-14 | 2018-08-24 | 平安科技(深圳)有限公司 | 票据识别方法、服务器及计算机可读存储介质 |
CN108460766B (zh) * | 2018-04-12 | 2022-02-25 | 四川和生视界医药技术开发有限公司 | 一种视网膜图像清晰度评估方法以及评估装置 |
CN108596084A (zh) * | 2018-04-23 | 2018-09-28 | 宁波Gqy视讯股份有限公司 | 一种充电桩自动识别方法及装置 |
CN108805172A (zh) * | 2018-05-08 | 2018-11-13 | 重庆瑞景信息科技有限公司 | 一种面向对象的图像效能盲评价方法 |
CN109104568A (zh) * | 2018-07-24 | 2018-12-28 | 苏州佳世达光电有限公司 | 监控摄像头的智能清洁驱动方法及驱动系统 |
CN110874547B (zh) * | 2018-08-30 | 2023-09-12 | 富士通株式会社 | 从视频中识别对象的方法和设备 |
CN111368837B (zh) * | 2018-12-25 | 2023-12-05 | 中移(杭州)信息技术有限公司 | 一种图像质量评价方法、装置、电子设备及存储介质 |
CN109948625A (zh) * | 2019-03-07 | 2019-06-28 | 上海汽车集团股份有限公司 | 文本图像清晰度评估方法及系统、计算机可读存储介质 |
CN110245577A (zh) * | 2019-05-23 | 2019-09-17 | 复钧智能科技(苏州)有限公司 | 目标车辆识别方法、装置及车辆实时监控系统 |
CN110287826B (zh) * | 2019-06-11 | 2021-09-17 | 北京工业大学 | 一种基于注意力机制的视频目标检测方法 |
CN110414519B (zh) * | 2019-06-27 | 2023-11-14 | 众安信息技术服务有限公司 | 一种图片文字的识别方法及其识别装置、存储介质 |
CN112396574B (zh) * | 2019-08-02 | 2024-02-02 | 浙江宇视科技有限公司 | 一种车牌图像质量处理方法、装置、存储介质及电子设备 |
CN110796624B (zh) * | 2019-10-31 | 2022-07-05 | 北京金山云网络技术有限公司 | 一种图像生成方法、装置及电子设备 |
CN110827261B (zh) * | 2019-11-05 | 2022-12-06 | 泰康保险集团股份有限公司 | 图像质量检测方法及装置、存储介质及电子设备 |
CN111192241B (zh) * | 2019-12-23 | 2024-02-13 | 深圳市优必选科技股份有限公司 | 一种人脸图像的质量评估方法、装置及计算机存储介质 |
CN111595267B (zh) * | 2020-05-18 | 2022-08-16 | 浙江大华技术股份有限公司 | 确定物体相位值的方法、装置、存储介质及电子装置 |
CN112396050B (zh) * | 2020-12-02 | 2023-09-15 | 度小满科技(北京)有限公司 | 图像的处理方法、设备以及存储介质 |
CN112991313B (zh) * | 2021-03-29 | 2021-09-14 | 清华大学 | 图像质量的评估方法及装置、电子设备和存储介质 |
CN113537192B (zh) * | 2021-06-30 | 2024-03-26 | 北京百度网讯科技有限公司 | 图像检测方法、装置、电子设备及存储介质 |
CN113506260B (zh) * | 2021-07-05 | 2023-08-29 | 贝壳找房(北京)科技有限公司 | 一种人脸图像质量评估方法、装置、电子设备及存储介质 |
CN113781428A (zh) * | 2021-09-09 | 2021-12-10 | 广东电网有限责任公司 | 一种图像处理方法、装置、电子设备及存储介质 |
CN114067006B (zh) * | 2022-01-17 | 2022-04-08 | 湖南工商大学 | 一种基于离散余弦变换的屏幕内容图像质量评价方法 |
CN114219803B (zh) * | 2022-02-21 | 2022-07-15 | 浙江大学 | 一种三阶段图像质量评估的检测方法与系统 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103049893A (zh) * | 2011-10-14 | 2013-04-17 | 深圳信息职业技术学院 | 一种图像融合质量评价的方法及装置 |
CN106686377A (zh) * | 2016-12-30 | 2017-05-17 | 佳都新太科技股份有限公司 | 一种基于深层神经网络的视频重点区域确定算法 |
CN107123122A (zh) * | 2017-04-28 | 2017-09-01 | 深圳大学 | 无参考图像质量评价方法及装置 |
CN107481238A (zh) * | 2017-09-20 | 2017-12-15 | 众安信息技术服务有限公司 | 图像质量评估方法及装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3400151B2 (ja) * | 1994-12-08 | 2003-04-28 | 株式会社東芝 | 文字列領域抽出装置および方法 |
JP3710164B2 (ja) * | 1995-05-02 | 2005-10-26 | キヤノン株式会社 | 画像処理装置及び方法 |
JP2003208568A (ja) * | 2002-01-10 | 2003-07-25 | Ricoh Co Ltd | 画像処理装置、画像処理方法、及び同方法に用いるプログラム |
JP2007156741A (ja) * | 2005-12-02 | 2007-06-21 | Koito Ind Ltd | 文字抽出方法、文字抽出装置およびプログラム |
US9298979B2 (en) * | 2008-01-18 | 2016-03-29 | Mitek Systems, Inc. | Systems and methods for mobile image capture and content processing of driver's licenses |
CN101533474B (zh) * | 2008-03-12 | 2014-06-04 | 三星电子株式会社 | 基于视频图像的字符和图像识别系统和方法 |
JP4821869B2 (ja) * | 2009-03-18 | 2011-11-24 | 富士ゼロックス株式会社 | 文字認識装置、画像読取装置、およびプログラム |
CN102054271B (zh) * | 2009-11-02 | 2013-11-20 | 富士通株式会社 | 文本行检测方法和装置 |
-
2017
- 2017-09-20 CN CN201710854415.9A patent/CN107481238A/zh active Pending
-
2018
- 2018-09-19 JP JP2020504760A patent/JP2020513133A/ja active Pending
- 2018-09-19 WO PCT/CN2018/106451 patent/WO2019057067A1/zh active Application Filing
- 2018-09-19 SG SG11201907815V patent/SG11201907815VA/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103049893A (zh) * | 2011-10-14 | 2013-04-17 | 深圳信息职业技术学院 | 一种图像融合质量评价的方法及装置 |
CN106686377A (zh) * | 2016-12-30 | 2017-05-17 | 佳都新太科技股份有限公司 | 一种基于深层神经网络的视频重点区域确定算法 |
CN107123122A (zh) * | 2017-04-28 | 2017-09-01 | 深圳大学 | 无参考图像质量评价方法及装置 |
CN107481238A (zh) * | 2017-09-20 | 2017-12-15 | 众安信息技术服务有限公司 | 图像质量评估方法及装置 |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110236544A (zh) * | 2019-05-29 | 2019-09-17 | 中国科学院重庆绿色智能技术研究院 | 基于相关系数的中风灌注成像病变区域检测系统及方法 |
CN110236544B (zh) * | 2019-05-29 | 2023-05-02 | 中国科学院重庆绿色智能技术研究院 | 基于相关系数的中风灌注成像病变区域检测系统及方法 |
CN110232381A (zh) * | 2019-06-19 | 2019-09-13 | 梧州学院 | 车牌分割方法、装置、计算机设备及计算机可读存储介质 |
CN110232381B (zh) * | 2019-06-19 | 2023-06-20 | 梧州学院 | 车牌分割方法、装置、计算机设备及计算机可读存储介质 |
CN111046886A (zh) * | 2019-12-12 | 2020-04-21 | 吉林大学 | 号码牌自动识别方法、装置、设备及计算机可读存储介质 |
JP2022519469A (ja) * | 2020-01-02 | 2022-03-24 | ▲広▼州大学 | 画像品質評価方法及び装置 |
CN111275681A (zh) * | 2020-01-19 | 2020-06-12 | 浙江大华技术股份有限公司 | 图片质量的确定方法及装置、存储介质、电子装置 |
CN111275681B (zh) * | 2020-01-19 | 2023-09-01 | 浙江大华技术股份有限公司 | 图片质量的确定方法及装置、存储介质、电子装置 |
CN113627419A (zh) * | 2020-05-08 | 2021-11-09 | 百度在线网络技术(北京)有限公司 | 兴趣区域评估方法、装置、设备和介质 |
CN111696083A (zh) * | 2020-05-20 | 2020-09-22 | 平安科技(深圳)有限公司 | 一种图像处理方法、装置、电子设备及存储介质 |
CN111696083B (zh) * | 2020-05-20 | 2024-05-14 | 平安科技(深圳)有限公司 | 一种图像处理方法、装置、电子设备及存储介质 |
CN112102309A (zh) * | 2020-09-27 | 2020-12-18 | 中国建设银行股份有限公司 | 一种确定图像质量评估结果的方法、装置及设备 |
CN112365451A (zh) * | 2020-10-23 | 2021-02-12 | 微民保险代理有限公司 | 图像质量等级的确定方法、装置、设备及计算机可读介质 |
CN112287898A (zh) * | 2020-11-26 | 2021-01-29 | 深源恒际科技有限公司 | 一种图像的文本检测质量评价方法及系统 |
CN112801132A (zh) * | 2020-12-28 | 2021-05-14 | 泰康保险集团股份有限公司 | 一种图像处理方法和装置 |
CN112767318A (zh) * | 2020-12-31 | 2021-05-07 | 科大讯飞股份有限公司 | 一种图像处理效果的评价方法、装置、存储介质及设备 |
CN112767318B (zh) * | 2020-12-31 | 2023-07-25 | 科大讯飞股份有限公司 | 一种图像处理效果的评价方法、装置、存储介质及设备 |
CN113450323A (zh) * | 2021-06-22 | 2021-09-28 | 深圳盈天下视觉科技有限公司 | 质量检测方法、装置、电子设备及计算机可读存储介质 |
CN115239961A (zh) * | 2022-09-21 | 2022-10-25 | 江苏跃格智能装备有限公司 | 一种激光切割机工作状态监测方法 |
CN116246273A (zh) * | 2023-03-07 | 2023-06-09 | 广州市易鸿智能装备有限公司 | 图像标注一致性评价方法、装置、电子设备及存储介质 |
CN116246273B (zh) * | 2023-03-07 | 2024-03-22 | 广州市易鸿智能装备有限公司 | 图像标注一致性评价方法、装置、电子设备及存储介质 |
Also Published As
Publication number | Publication date |
---|---|
SG11201907815VA (en) | 2019-11-28 |
CN107481238A (zh) | 2017-12-15 |
JP2020513133A (ja) | 2020-04-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2019057067A1 (zh) | 图像质量评估方法及装置 | |
US10896349B2 (en) | Text detection method and apparatus, and storage medium | |
WO2017121018A1 (zh) | 二维码图像处理的方法和装置、终端、存储介质 | |
US8902053B2 (en) | Method and system for lane departure warning | |
KR102146560B1 (ko) | 영상 보정 방법 및 장치 | |
US9251614B1 (en) | Background removal for document images | |
EP3467774A1 (en) | Method for tracking and segmenting a target object in an image using markov chain, and device using the same | |
CN109255350B (zh) | 一种基于视频监控的新能源车牌检测方法 | |
CN105469027A (zh) | 针对文档图像的水平和垂直线检测和移除 | |
JP2018524732A (ja) | 半自動画像セグメンテーション | |
US9275030B1 (en) | Horizontal and vertical line detection and removal for document images | |
JP2006301847A (ja) | 顔検出方法および装置並びにプログラム | |
US9171224B2 (en) | Method of improving contrast for text extraction and recognition applications | |
JP6440278B2 (ja) | 撮像装置及び画像処理方法 | |
CN105303190B (zh) | 一种基于对比度增强法的降质文档图像二值化方法 | |
EP2821935A2 (en) | Vehicle detection method and device | |
US8442348B2 (en) | Image noise reduction for digital images using Gaussian blurring | |
CN117094975A (zh) | 钢铁表面缺陷检测方法、装置及电子设备 | |
US8300927B2 (en) | Mouth removal method for red-eye detection and correction | |
CN104268845A (zh) | 极值温差短波红外图像的自适应双局部增强方法 | |
CN113537037A (zh) | 路面病害识别方法、系统、电子设备及存储介质 | |
CN110287752B (zh) | 一种点阵码检测方法及装置 | |
CN109948605B (zh) | 一种针对小目标的图片增强方法及装置 | |
JP2008165496A (ja) | 画像正規化装置、対象物検出装置、対象物検出システム及びプログラム | |
US20190259168A1 (en) | Image processing apparatus, image processing method, and storage medium |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18857750 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2020504760 Country of ref document: JP Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 16.09.2020) |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 18857750 Country of ref document: EP Kind code of ref document: A1 |