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Method and device for evaluating white blood cell image definition

A technology of image definition and evaluation method, which is applied in image enhancement, image analysis, image data processing, etc. It can solve the problems of image evaluation, image definition evaluation is not accurate enough, definition detection speed is slow, etc., and achieve real-time evaluation , Realize partial evaluation and avoid evaluation errors

Active Publication Date: 2018-10-19
JIANGSU KONSUNG BIOMEDICAL TECH
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Problems solved by technology

[0005] Purpose of the invention: In order to overcome the deficiencies of the prior art, the present invention provides a method and device for evaluating the clarity of white blood cell images, which solves the problems of slow detection speed of clarity, inaccurate evaluation of image clarity and inability to accurately evaluate local blur and blur degree. Problems with evaluating large images

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  • Method and device for evaluating white blood cell image definition
  • Method and device for evaluating white blood cell image definition
  • Method and device for evaluating white blood cell image definition

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Embodiment Construction

[0064] In order to verify the feasibility and effectiveness of the present invention, the present invention has done a preliminary simulation and measurement experiment. The experimental blood sample comes from the laboratory department of the hospital. The white blood cell extraction and analysis are completed in the software Matlab2017a, the image size is 1920×1080, and the white blood cell magnification is 4 times; the statistical t-test analysis of the sample parameters is completed by SPSS21.0, such as figure 1 Shown, method described in the present invention comprises:

[0065] 101. Obtain the input original white blood cell image and convert it to a grayscale image. The original image can be recorded as f 0 , the grayscale image can be written as f gray ;

[0066] 102. Convert the grayscale image f gray performing block formation to form image blocks, and randomly extracting the image blocks to be analyzed;

[0067] Optionally, in an embodiment of the present invent...

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Abstract

The invention discloses a method for evaluating the white blood cell image definition. The method comprises: acquiring an input original white blood cell image and converting the original white bloodcell image into a grayscale image; dividing the grayscale image into image blocks, and randomly extracting the to-be-analyzed image block; performing denoising on the extracted image block to obtain anoise reduction image; performing cell region segmentation of the noise reduction image by using the OTSU method to obtain an optimal segmentation threshold; performing low-pass filtering on the noise reduction image to acquire a degraded image; acquiring TenenGrad parameters of the noise reduction image and the degraded image corresponding to the noise reduction image, and calculating the definition of the image block, wherein the optimal segmentation threshold is used as a customization image threshold of a TenenGrad function; and calculating the mean of the definitions of all extracted image blocks, and analyzing samples to obtain a virtual focus degree threshold. The present invention achieves local evaluation of the image definition while evaluating the overall definition of the image by analyzing definition parameters at different positions of the image.

Description

technical field [0001] The invention relates to a definition evaluation method and device, in particular to a white blood cell image definition evaluation method and device. Background technique [0002] Thanks to the rapid development of POCT, portable white blood cell counters have been extensively studied in recent years due to their advantages of speed and convenience. However, the accuracy of portable white blood cell counting equipment is not accurate enough. One of the main reasons affecting its accuracy is the image virtual focus: the detection starts when the cells to be tested are not completely adhered to the wall; improper placement of the reagent sheet will cause image virtual focus or partial virtual focus. Image defocus seriously affects the accuracy of subsequent white blood cell count and classification. Currently commonly used image sharpness judgment methods cannot evaluate the absolute quality under the sharpness standard completely independently of the...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T5/00G06T7/136
CPCG06T7/0012G06T7/136G06T2207/10056G06T2207/20021G06T2207/30004G06T5/92G06T5/70
Inventor 张雪项智
Owner JIANGSU KONSUNG BIOMEDICAL TECH
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