With the development of the security industry, users need to pay attention to several factors when choosing a surveillance camera.
1. Sharpness measurement When testing multiple surveillance cameras, the same lens should be used to test that the center circle of the test card appears on the left and right sides of the monitor screen. Clearly and accurately, the given tick marks are counted for a total of 10 groups. Line and 10 horizontal lines.
2. Illumination The surveillance camera is placed in a dark room. Before and after the dark room, there is an active 220V self-firing lamp. A voltage regulator is provided at the place where the voltage regulator adjusts the voltage generation to adjust the brightness of the dark room lamp. The voltage can be adjusted from 0V to 250V.
3. Color Reducibility Test Test This parameter should be selected color monitor. First of all observe the characters and costumes from a distance to see if there is any color distortion. Compare the objects with vivid colors. Look at the sensitivity of the surveillance camera. Take the color picture book in front of the camera and see the picture clearly outlined, too light or too thick. Take a picture of colorful objects in motion to see if there are color trails, delays, blurs, etc.
4. Ball Distortion Whether the ball is distorted or not, place the test card at the front of the surveillance camera so that the entire sphere appears on the screen. See if the sphere has an ellipse. Move the camera forward to see if the center of the circle is magnified and then test the distance. Whether the edges, corners, boxes have arc distortion.
5. Backlight Compensation Test There are two methods for this parameter: one is in the dark room, turn on the front of the surveillance camera, adjust the light to the brightest, and then place a picture or text under the lamp to greet the surveillance camera. Optical camera to see if images and text can be seen.
With the deepening of video surveillance and combined with video surveillance technology, video surveillance will become the main technology in the Internet of Things, smart cities, smart cars and other industries.
1. Sharpness measurement When testing multiple surveillance cameras, the same lens should be used to test that the center circle of the test card appears on the left and right sides of the monitor screen. Clearly and accurately, the given tick marks are counted for a total of 10 groups. Line and 10 horizontal lines.
2. Illumination The surveillance camera is placed in a dark room. Before and after the dark room, there is an active 220V self-firing lamp. A voltage regulator is provided at the place where the voltage regulator adjusts the voltage generation to adjust the brightness of the dark room lamp. The voltage can be adjusted from 0V to 250V.
3. Color Reducibility Test Test This parameter should be selected color monitor. First of all observe the characters and costumes from a distance to see if there is any color distortion. Compare the objects with vivid colors. Look at the sensitivity of the surveillance camera. Take the color picture book in front of the camera and see the picture clearly outlined, too light or too thick. Take a picture of colorful objects in motion to see if there are color trails, delays, blurs, etc.
4. Ball Distortion Whether the ball is distorted or not, place the test card at the front of the surveillance camera so that the entire sphere appears on the screen. See if the sphere has an ellipse. Move the camera forward to see if the center of the circle is magnified and then test the distance. Whether the edges, corners, boxes have arc distortion.
5. Backlight Compensation Test There are two methods for this parameter: one is in the dark room, turn on the front of the surveillance camera, adjust the light to the brightest, and then place a picture or text under the lamp to greet the surveillance camera. Optical camera to see if images and text can be seen.
With the deepening of video surveillance and combined with video surveillance technology, video surveillance will become the main technology in the Internet of Things, smart cities, smart cars and other industries.
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