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Paper waveform extraction method and device

A waveform extraction and waveform technology, which is applied in the field of data processing, can solve problems such as poor image quality, paper damage, and printing curve color fading, etc.

Active Publication Date: 2020-02-07
WUHAN ZHONGQI BIOLOGICAL MEDICAL ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Electrocardiogram is an important inspection method for diagnosing heart diseases. Most ECG reports are recorded by thermal printing paper. Due to the chemical characteristics and storage conditions of thermal printing paper, the color of the printed curve will become lighter, the quality of the picture will deteriorate, and even The paper is damaged, so that the typical clinical ECG signals cannot be preserved for a long time

Method used

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  • Paper waveform extraction method and device
  • Paper waveform extraction method and device
  • Paper waveform extraction method and device

Examples

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no. 1 example

[0025] Please refer to figure 2 , figure 2 It is a flowchart of a paper waveform extraction method provided by the first embodiment of the present invention, and the method is applied to the client. The following will figure 2 The illustrated process is elaborated, and the method includes:

[0026] Step S110: Obtain the data of the electrocardiogram, and separate the background grid area included in the electrocardiogram based on the threshold method to obtain the waveform and the text area.

[0027] Since the thermal printing paper of the ECG report graph is light red background grid, the printed curve and text are all black, the picture of the printed report is a color graph, according to the principle of RGB composite color image, the light red background grid and The threshold of the black curve in the R, G, and B layer pictures is obviously different. The grid and the curve text are separated according to the threshold offset, and a black and white picture with only the cur...

no. 2 example

[0052] Please refer to Figure 4 , Figure 4 It is a structural block diagram of a paper waveform extraction device 400 provided by the second embodiment of the present invention. The following will Figure 4 The illustrated structural block diagram is illustrated, and the illustrated device includes:

[0053] The first obtaining module 410 is configured to obtain data of the electrocardiogram, and separate the background grid area included in the electrocardiogram based on the threshold method to obtain the waveform and the text area;

[0054] The projection module 420 is configured to obtain the upper, lower, left, and right boundary positions of the lead waveform in the waveform and text area based on the projection contour method, and extract the complete lead waveform;

[0055] The segmentation module 430 is configured to segment the lead waveform into a plurality of sub-areas according to the position of the upper, lower, left, and right borders and the print layout included in...

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Abstract

The invention provides a paper waveform extraction method and a paper waveform extraction device. In the method, waveform and character areas are separated from an electrocardiogram via a threshold method; a complete lead waveform area is acquired via a projection profile method; a lead waveform is divided into a plurality of sub-areas; under the condition that lead waveform pixels of the sub-areas are not lost, a lead waveform communicated area can be significantly distinguished from a lead symbol and a lead separator via the characteristic that the number of the pixels of the lead waveform communicated area is maximum, the lead waveform can be extracted at a time, and positioning of a projection threshold is not needed; when the waveform areas of the sub-areas do not communicate, distances between the communicated areas in the sub-areas are compared via a distance judgment method to screen out the shortest distance, the communicated areas belonging to the waveform areas are combinedend to end to generate a communicated waveform area, and thus the lead waveform is extracted. The problem that the traditional threshold projection method cannot be accurately extracted due to existence of a part of special waveforms can be solved.

Description

Technical field [0001] The invention relates to the field of data processing, and in particular to a method and device for extracting paper waveforms. Background technique [0002] The electrocardiogram is an important examination method for diagnosing heart diseases. Most of the electrocardiogram reports are recorded on thermal printing paper. Due to the chemical properties of thermal printing paper and storage conditions, the color of the printed curve will become lighter, the picture quality will deteriorate, and even The paper is damaged, making the typical clinical ECG signals unable to be preserved for a long time. If the retained ECG paper file report is converted into a picture by a laser printer or a digital camera, and then the waveform data in the picture is extracted through image processing technology, the waveform curve in the picture is digitized, and then archived in a certain format, which is not only beneficial The hospital's management of patient information, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/34G06K9/46A61B5/0402A61B5/04
Inventor 张玮
Owner WUHAN ZHONGQI BIOLOGICAL MEDICAL ELECTRONICS