A method, system and device for partially updating and drawing an electrocardiogram
An electrocardiogram and local technology, which is applied in the field of data processing, can solve the problem of insufficient drawing performance, and achieve the effect of improving drawing performance and reducing the occupancy rate of CPU computing resources.
Active Publication Date: 2020-01-24
WUHAN EASYDIAGNOSIS BIOMEDICINE
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, propose a method, system and device for partially updating and drawing an electrocardiogram, and solve the technical problem that the drawing performance in the prior art is not high enough
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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0026] The present invention provides a method for locally updating and drawing an electrocardiogram, which includes:
[0027] S1, according to the size of the screen DC (Device Context, device description table), create a background DC and an electrocardiogram DC having the same width and height as the screen DC in the memory;
[0028] In step S1, the background DC and the electrocardiogram DC created in the memory are used as the electrocardiogram buffer. It can be understood that the size of the screen DC refers to the size of the area where the drawn electrocardiogram is displayed on the screen...
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The invention discloses a method for partially updating and drawing an electrocardiogram, which includes the following steps: creating a background DC and an electrocardiogram DC having the same width and height as the screen DC in memory according to the size of the screen DC; drawing an electrocardiogram background in the background DC; The ECG background is pasted to the ECG DC and the screen DC; when a frame of ECG is drawn in the ECG DC, the ECG data of the corresponding channel is obtained from the cache, and the acquired ECG data of each channel is drawn to the corresponding local area in the ECG DC to Partially update the ECG DC; paste the locally updated ECG DC to the screen DC. The method draws the electrocardiogram in a local area update manner to reduce the CPU computing resource occupancy rate and greatly improves the drawing performance. By sleeping the drawing thread and dynamically adjusting the sleep time according to the queue length, the smoothness of the electrocardiogram drawing is improved. The invention also provides a system for locally updating and drawing an electrocardiogram and an electrocardiogram acquisition device with the system.
Description
technical field [0001] The invention relates to the technical field of data processing, in particular to a method, system and device for locally updating and drawing an electrocardiogram. Background technique [0002] ECG workstations and electrocardiographs are used as medical diagnostic equipment for ECG examination. During the process of collecting ECG signals from patients, real-time display of ECG waveforms is a basic clinical requirement when selecting stable and effective waveforms. When realizing the real-time drawing of ECG waveform, the method of drawing ECG by scanning the screen is a relatively common method. In the ECG machine, because real-time drawing of graphics requires a high computing power for the main control, the background network is generally not used. Instead, use a solid color background for drawing and erasing, which simplifies the drawing logic and reduces the performance requirements for the main control. In order to facilitate the realization o...
Claims
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IPC IPC(8): A61B5/044
CPCA61B5/339
Inventor 左涛王颖王锐向小飞
Owner WUHAN EASYDIAGNOSIS BIOMEDICINE