Unlock instant, AI-driven research and patent intelligence for your innovation.

A Method for Correcting the Slope of Electrocardiogram Scanning Image

A technology of scanning images and correction methods, which is applied in the directions of instruments, calculations, character and pattern recognition, etc., and can solve problems such as processing speed that cannot meet real-time requirements, poor image effects, and large amount of calculations

Active Publication Date: 2020-04-24
TIANJIN UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The projection-based method is simple and fast, but it is not effective for ECG images with dense grid lines
The transformation-based method judges the inclination angle by detecting straight line segments, but whether it is Hough transform or Rodon transform, the amount of calculation required is large. If the resolution of the input scanned image is high, the processing speed will not meet the real-time requirements.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Method for Correcting the Slope of Electrocardiogram Scanning Image
  • A Method for Correcting the Slope of Electrocardiogram Scanning Image
  • A Method for Correcting the Slope of Electrocardiogram Scanning Image

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] At present, the paper used for printing ECG in most hospitals in China is usually thermal paper. The paper is calibrated with a crisscross red grid, and the ECG waveform is printed on the paper as a black waveform. Scanned color ECG images mainly include three types of color points (such as figure 1 Shown): (1) black dots, including ECG waveform and marked characters; (2) red dots, mainly background grid dots, (3) white background dots. Among the three types of color points, the white background points have the largest number, the black points with a small number are mainly used to extract the waveform information of the ECG, and the red grid points can be used to help detect the image rotation angle. The red grid points are composed of many mutually perpendicular horizontal lines and vertical lines, and the rotation angle of the horizontal lines is basically the same as that of the scanned image. The method proposed in the present invention utilizes the gradient dire...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for correcting the inclination of an electrocardiogram scanning image, comprising: bilateral filter processing; converting from RGB color space to HSV color space; enhancing the saturation component map FS; using Otsu method to binarize and construct a binary map ; Morphological expansion processing; calculate the gradient value and direction of each point with a value of 1 in the binary image; construct the gradient direction histogram HOG; obtain the local extremum point sequence {HSTm}, and select the first principal point close to 0° The direction angle and the second main direction angle close to 90°; calculate the inclination angle of the electrocardiogram scanning image; obtain the corrected image.

Description

technical field [0001] The invention relates to a digital processing technology of electrocardiogram scanning images, in particular to a method for correcting the inclination of electrocardiogram scanning images. Background technique [0002] In the clinical diagnosis process, hospitals have always relied on the electrocardiogram as an instrument to monitor the electrical activity of the patient's heart. Because the paper is fragile and the writing on thermal paper is unstable and easy to fade, most paper ECGs will be damaged to varying degrees. And these paper ECGs are a valuable asset, which can establish a rich case database, help scholars conduct scientific research and analysis, increase doctors' clinical diagnosis experience, and support online remote diagnosis, etc. Therefore, the extraction of digital information from paper ECG has become an urgent problem to be solved. [0003] The paper ECG is composed of criss-cross background coordinate grid, ECG waveform curve...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/32
CPCG06V10/245
Inventor 王建庞彦伟
Owner TIANJIN UNIV