1. Measurement of sharpness: When testing by multiple high-speed dome cameras, the same lens should be used (recommended for fixed focus and two variable lenses). The center circle of the test card appears on the left and right sides of the monitor screen. Clearly and accurately count the 10 vertical lines and 10 horizontal lines that have been given. Represents vertical resolution and horizontal resolution, respectively, and the corresponding set has given the number of lines. For example, the vertical 350 line level 800 line, at this time it is best to use a black and white monitor. The test can focus on distant objects or focus on the edge. It's best to use both, and you can see the difference in this high-speed dome camera (for far and near convergence).
2, high-speed ball camera color reproduction test: test this parameter should choose a good color monitor. First, observe the characters and costumes from a distance to see if there is any color distortion. Compare the objects with bright colors. Look at the sensitivity of the high-speed dome camera. Take the color album in front of the high-speed dome camera. See the picture clearly and clearly. Again, take pictures of moving colored objects to see if there are color trails, delays, blurs, etc. The test conditions such that the maximum illuminance of the camera at 50V should be measured under the condition of 50+10V illumination, that is, ten volts is added to the highest illumination of each high-speed dome camera, and the aperture should maintain the closest state.
3. Illumination: Place the high-speed dome camera in the dark room, before and after the darkroom, use an active 220V self-firing lamp, set a pressure regulator at the place, and adjust the darkness of the dark room lamp with the voltage regulator to adjust the brightness of the dark room lamp. The voltage can be adjusted from 0V to 250V. The indoor illumination can also be adjusted from the darkest to the brightest. When the speed dome of the high-speed dome camera is set to the maximum during the test, the next lowest illumination value is recorded (the dimming of the active lamp regulator is darkened so that the screen cannot be cleared). When the aperture is at a minimum, the next minimum illuminance value is recorded, and the front and rear lamps can be individually adjusted for pressure and light.
4. High-speed dome camera backlight compensation: There are two methods to test this parameter: one is in the dark room, the front of the high-speed dome camera is turned on, the brightness is adjusted to the brightest, and then a picture or text is placed under the lamp. High-speed dome camera to meet the light camera, to see whether the image and text can be seen, the screen is not harsh glare, and adjust the AL, AX gear switch to see if there is a change, which effect is best. The other is to take the camera out of the window when the sun is shining. At this time, you can see if the image and text are clear.
5, high-speed ball camera distortion: to see the high-speed ball camera distortion test card placed in front of the camera so that the entire sphere appears on the screen to see whether the spherical ball oval, the camera forward, see the center of the circle without amplification, and then long-distance test Whether the edges, corners, boxes have arc distortion.
6, high-speed ball camera power consumption: the minimum operating voltage, use a multimeter to measure the current, use a small regulator to adjust the voltage to see.
2, high-speed ball camera color reproduction test: test this parameter should choose a good color monitor. First, observe the characters and costumes from a distance to see if there is any color distortion. Compare the objects with bright colors. Look at the sensitivity of the high-speed dome camera. Take the color album in front of the high-speed dome camera. See the picture clearly and clearly. Again, take pictures of moving colored objects to see if there are color trails, delays, blurs, etc. The test conditions such that the maximum illuminance of the camera at 50V should be measured under the condition of 50+10V illumination, that is, ten volts is added to the highest illumination of each high-speed dome camera, and the aperture should maintain the closest state.
3. Illumination: Place the high-speed dome camera in the dark room, before and after the darkroom, use an active 220V self-firing lamp, set a pressure regulator at the place, and adjust the darkness of the dark room lamp with the voltage regulator to adjust the brightness of the dark room lamp. The voltage can be adjusted from 0V to 250V. The indoor illumination can also be adjusted from the darkest to the brightest. When the speed dome of the high-speed dome camera is set to the maximum during the test, the next lowest illumination value is recorded (the dimming of the active lamp regulator is darkened so that the screen cannot be cleared). When the aperture is at a minimum, the next minimum illuminance value is recorded, and the front and rear lamps can be individually adjusted for pressure and light.
4. High-speed dome camera backlight compensation: There are two methods to test this parameter: one is in the dark room, the front of the high-speed dome camera is turned on, the brightness is adjusted to the brightest, and then a picture or text is placed under the lamp. High-speed dome camera to meet the light camera, to see whether the image and text can be seen, the screen is not harsh glare, and adjust the AL, AX gear switch to see if there is a change, which effect is best. The other is to take the camera out of the window when the sun is shining. At this time, you can see if the image and text are clear.
5, high-speed ball camera distortion: to see the high-speed ball camera distortion test card placed in front of the camera so that the entire sphere appears on the screen to see whether the spherical ball oval, the camera forward, see the center of the circle without amplification, and then long-distance test Whether the edges, corners, boxes have arc distortion.
6, high-speed ball camera power consumption: the minimum operating voltage, use a multimeter to measure the current, use a small regulator to adjust the voltage to see.
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