Select video conference camera test items
Test HD video camera main test resolution and color reproduction, illumination, backlight compensation, followed by measuring the camera distortion, power consumption, minimum operating voltage, the following first clarity and color reproduction and illumination, backlight compensation measurement steps Let me introduce it first.
1 . Measurement of sharpness: When testing with multiple high-definition conference 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 right and left sides of the monitor screen. Clear and accurate The number of ticks given has a total 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.
2 . Color Reducibility Test: The color monitor selected for this parameter should be selected. First, observe characters and costumes from a distance to see whether there is color distortion or not, and compare the sensitivity of surveillance cameras with high-definition objects. Before taking a color picture album on a surveillance camera, look at the picture clearly, too light or too thick. Once again, you should take pictures of moving colorful objects to see if there are color trails, delays, or blurs.
3 . HD backlight compensation: There are two methods to test this parameter: one is in the dark room, the front of the camera is turned on, adjust the brightness to the brightest, and then put a picture or text under the lamp, the surveillance camera to the light The camera can see whether the image and text can be seen clearly and the picture is not dazzling. Which 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.
4 . HD distortion: Look at the camera distortion. Place the test card at the front of the 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. Then test the edges, angles, and frames at a distance. No arc distortion.