6 steps to tell you how to test your camera

We know that the six major factors affecting the quality of surveillance cameras are: picture clarity, color reproduction, illumination, backlight compensation, ball distortion, and power consumption. As a company engaged in network cameras for many years, Shenzhen Zhongte Anding Technology Co., Ltd. has extensive industry experience in the development and production of surveillance cameras.

1. Measurement of sharpness

 When testing multiple surveillance cameras, the same lens should be used (it is recommended to use fixed focus and two variable lenses). The center circle of the test card appears on the left and right edges of the monitor screen. Clear and accurate numbers are given. The ticks consist of 10 vertical lines and 10 horizontal lines. 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 is best to use both, and you can see the differences in this camera (for far and near convergence).

2. Color reproduction test

 Test this parameter should choose a good color monitor. First, observe people and clothes from a distance to see whether there is color distortion or not, and compare the sensitivity of the surveillance cameras. Look at the pictures in front of the camera to see if the picture is too clear or too thick. Take a picture of colorful objects in motion 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 illuminance, that is, 10V on the basis of the most illuminance of each camera, and the aperture should maintain the closest state.

3. 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. The indoor illumination can also be adjusted from the darkest to the brightest. When the camera's aperture is open to the maximum, the next lowest illuminance value is recorded during the test (the active light regulator is dimmed to a position that cannot be seen in the dark interior). Hit the minimum and then record the next minimum illuminance value.

4. Backlight compensation

  There are two ways to test 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 below the lamp to watch the camera and watch it. Whether the image and text can be seen, the picture is not dazzling, 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 point, you can see if the image and text can be seen clearly.

5. Spherical distortion

 To see if the ball type is distorted, 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, and put the camera. Move forward to see whether the center of the circle is magnified, and then test whether there are any arc distortions in the edges, corners, and frames.

6. Power consumption

 Minimum operating voltage, use a multimeter to measure current, and use a small regulator to adjust the voltage.