The test camera mainly tests sharpness and color reproduction, illumination, and backlight compensation, followed by measurement of ball distortion, power consumption, and minimum operating voltage. The following first measurement steps for sharpness and color reproduction and illumination and backlight compensation introduce.
1. Sharpness measurement When testing multiple 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 counts are available. The ticks given have 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. 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 reproducibility test test This parameter should be selected color monitor. First observe the characters and costumes from a distance to see whether there is color distortion or not. Compare the objects with vivid colors. Look at the sensitivity of the camera. Take the color picture book in front of the camera. Look at the picture clearly, too light or too thick, and respond to the motion again. The color objects are photographed for color smearing, lag, blur, 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, plus ten volt on the basis of the most illuminance of each camera, and the aperture should be kept in the closest state.
3. Illumination The camera is placed in a darkroom. Before and after the darkroom, there is an active 220V self-firing lamp. A voltage regulator is provided to adjust the darkness of the dark room lamp with a voltage regulator to adjust the darkness 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 minimum 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. There are two methods for back light compensation test: one is in the dark room, the front lamp of the camera is turned on, the light is adjusted to the brightest, and then a picture or text is placed under the lamp, and the camera is photographed to see the light. 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 any change, which kind of 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. Ball Distortion Watch Ball Distortion Place the test card on the front of the camera so that the entire sphere appears on the screen. See whether the sphere has an ellipse or not. Move the camera forward to see if the center of the circle is magnified. Then test the edges, angles, and frames at a distance. There is no arc distortion and so on.
6. Power consumption minimum operating voltage, use a multimeter to measure current, use a small regulator to adjust the voltage
1. Sharpness measurement When testing multiple 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 counts are available. The ticks given have 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. 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 reproducibility test test This parameter should be selected color monitor. First observe the characters and costumes from a distance to see whether there is color distortion or not. Compare the objects with vivid colors. Look at the sensitivity of the camera. Take the color picture book in front of the camera. Look at the picture clearly, too light or too thick, and respond to the motion again. The color objects are photographed for color smearing, lag, blur, 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, plus ten volt on the basis of the most illuminance of each camera, and the aperture should be kept in the closest state.
3. Illumination The camera is placed in a darkroom. Before and after the darkroom, there is an active 220V self-firing lamp. A voltage regulator is provided to adjust the darkness of the dark room lamp with a voltage regulator to adjust the darkness 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 minimum 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. There are two methods for back light compensation test: one is in the dark room, the front lamp of the camera is turned on, the light is adjusted to the brightest, and then a picture or text is placed under the lamp, and the camera is photographed to see the light. 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 any change, which kind of 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. Ball Distortion Watch Ball Distortion Place the test card on the front of the camera so that the entire sphere appears on the screen. See whether the sphere has an ellipse or not. Move the camera forward to see if the center of the circle is magnified. Then test the edges, angles, and frames at a distance. There is no arc distortion and so on.
6. Power consumption minimum operating voltage, use a multimeter to measure current, use a small regulator to adjust the voltage
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