The influencing factors of 6mm diameter Dual-lens camera module imaging, electronic endoscope: endoscope body, optical system, light source, 4 control subsystems and computer image processing and display system. The main body of the endoscope refers to the body part of the endoscope, including an optical imaging system, an area array CCD, a beam transmission and an adjustment mechanism. The control subsystem includes CCD driving circuit and image acquisition circuit (driving CCD, controlling image acquisition), video driving brightness control system (adjusting the luminous brightness of light source), image distortion real-time correction system (for real-time online correction of endoscope optical system) distortion) and real-time image acquisition and 6mm diameter Dual-lens camera module system (controls image acquisition and display).
The working principle of the electronic endoscope is as follows: the light emitted by the light source passes through the light beam (optical fiber), passes through the main body of the endoscope, and is transmitted to the inside of the human body to illuminate the part of the human body that needs to be inspected. The objective lens images the part to be inspected on the area array CCD. On the top, the CCD driving circuit controls the CCD to collect images and output standard video signals. The adjustment mechanism is used to adjust the observation angle of the front end of the 6mm diameter Dual-lens camera module, which can be adjusted up and down, left and right, and rotated. The video-driven brightness control system adjusts the brightness of the light source according to the video signal output by the CCD to ensure that there is no white high-brightness area on the output image. Due to the distortion of the optical system, the CCD outputs a distorted video signal, and the image distortion real-time correction system corrects it and outputs the corrected video signal. The real-time image acquisition and display system collects, saves and processes the corrected video signal, and manages the medical records.
What are the factors that affect the imaging of the 6mm diameter Dual-lens camera module? The electronic endoscope hole probe image is often affected by noise and is not clear enough. There are many reasons for the noise, such as the internal noise of sensitive components, the particle noise of photosensitive materials, Thermal noise, jitter noise caused by relative motion, interference noise of transmission channel, quantization noise, etc. Reflected on the image, the noise makes the originally uniform and continuously changing gray scale suddenly increase or decrease, forming some isolated points and false edges, and sometimes even submerging the features, which brings a lot of difficulties to the analysis. The cause of noise determines the distribution characteristics of noise and its relationship with the image signal. What aspects should I look for when buying an endoscope monitor?
For the requirements of the screen size of the endoscope monitor, the general selection principle is: a monitor that is only used to monitor one picture (including the alternate switching display of one picture). The screen size can be smaller (for example, 14" monitor For monitors used to display multiple pictures at the same time (such as 16 pictures), the screen size should be larger. The screen size of the monitor should be based on the distance between the monitor and the monitor screen. 4-6 times the relationship of the angle line to be selected.
The endoscope monitor used to display the image of the black and white surveillance camera should generally be a black and white monitor; the monitor used for the color surveillance camera should be a color monitor, so that the surveillance camera corresponds to the monitor.
Use a monitor with a metal shell, which has better shielding performance (especially after its shell is grounded), and is not easy to suffer from the interference of space electromagnetic fields.
The technical indicators of the selected endoscope monitor should usually be higher than the technical indicators of the entire system. The number of monitors is determined by the number of surveillance cameras. Generally, the 4,1 method is adopted (if there are 16 camera points, 4 monitors should be selected). The special monitor for video recording can be set separately. According to the resolution index of the surveillance camera used, a monitor with a higher resolution should be selected, generally 100 TV lines higher. Meet the system index requirements. Have a good after-sales service system. What kind of endoscope monitor works well?
The size of the medical endoscope monitor is related to its resolution. The higher the resolution, the larger the size, but it is not proportional. CRT monitors range in size from 17 inches to 21 inches. Liquid crystal (LCD) displays range in size from 18 inches to 32 inches. Regarding the question of whether to choose a horizontal screen or a vertical screen, you can choose according to your own habits. Today's medical LCD manufacturers have designed a function that can be converted between horizontal and vertical, which greatly facilitates clinical use, taking into account the habits and requirements of doctors to read pictures.
The resolution of the endoscope monitor refers to the number of display pixels per unit area, and the cost of the display is proportional to the resolution. Choose a normal monitor resolution of 1024×768. The resolution of the monitor is closely related to the resolution of the image itself. Proper selection of the resolution of the endoscopic monitor can effectively reduce the acquisition cost of the monitor. The response time refers to the response speed of the liquid crystal display to the input signal, that is, the response time of the liquid crystal from bright to dark.
The higher the brightness, the more gray levels the human eye can distinguish. In order to improve the resolution of gray scales, the brightness of the display must be high. The higher the brightness, the more gray levels the human eye can distinguish.
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