The method of image test of CCD board machine

1, the test of CCD machine is a big engineering graphics, ready to test figure, conditional ready striped light box, but the thing is too expensive, few people have today is mainly about how to use a test CCD figure machine effect.

1) generally where several meters away from the camera, the camera fixed adjustment to the clear place, at the same time by comparing can roughly know the camera line number, compared several cameras and clarity, and wide dynamic effect of general performance. Fine-tuning a camera, you must pay attention to science, a good camera for debugging is bad instead affects the quality of normal play, debugging the camera must be in strict accordance with the technical process to a good surveillance cameras: usually have 8 or 9 mm, manual two variable aperture lens, lens is very critical, with a good shot, seiko lens or Computar
2) a good monitor: it is best to high resolution, more than 500, it is better to black and white high resolution measurement resolution, but for the sake of convenience, color of use, and will monitor, color, brightness, contrast knob to middle.
3) a test diagram of a monitoring camera
Will begin testing: 1. The test figure is, surveillance cameras pointed at the test center, adjust the surveillance cameras and test pattern distance until the display shows the pattern of "just right" fill the entire screen, that is, the "test pattern corners into the box," if the monitor! 2) in the test pattern on each side put an incandescent bulb, according with 45 degree Angle on the chart, the chart surface is uniform irradiation light. 3. The surveillance cameras mounted on a tripod or stand as far as possible on 4. Will monitor the camera off the backlight compensation (BLC), automatic gain (AGC) off, white balance in ATW,
Cut to AES (automatic electronic shutter, namely that a manual lens with), turned to the lens aperture, adjust the focal length, let the image transferred to the most clear, then you can use a ring radial among test figure, indicate the Focus Target, the block diagram as a Focus, remember, test pattern curtain, still need to fill a battalion too much or too little (four corners into the box)
Cut the monitor camera AES/ALC to the ALC, the automatic aperture, and the screen will turn white! Turn down the lens aperture by about 1/3 until the image is restored correctly. If you overdo it, you need to turn it back.
Resolution test: watching carefully test pattern has four upwards in the synthesis of a beam line, (of course, is to see the inside of the screen), from the bottom up, more and more close, until the four lines together quickly, not every distinguish, remember, is this, come back to see the picture view, find the line number beside the point target, is the resolution of the surveillance cameras! This test will not have more than 20 errors
Bandwidth test at top left a row of straight line (indicate the Bandwidth in MHz), look at the screen, that piece is barely points clear, this is digital surveillance cameras Bandwidth, this data is for reference only, in general, the higher the resolution of machines, the greater the Bandwidth.
CCD figure on the four corners of flatness test each have a concentric circles, such as right: there are two functions: 1. To look at test pattern set is not straight, if the straighten, four circle diagram should clear. 2. When put right, if you have one or two concentric circles will be out of focus, says CCD is uneven, the returned goods
Impedance matching test principle diagram on the left there is a large black and white: if regional permeability to white or black white to black area, it means you have a problem of impedance matching, or reflections, may be a joint is not ready, there is something wrong with the wire, and so on, this method can be used to test a long wire transfer impedance matching.
Color reduction
Using the Color Bar on the test pattern: compare with the actual test chart from the monitor to see see, surveillance cameras can be read easily Color reduction degrees. In fact the most unpredictable, how can you be sure is right surveillance cameras or monitor with this Color is not correct? If you think your monitor is good, that's the color, brightness, contrast knobs are placed in the middle. If unable to determine the display no problem, you can get a test CDS, get to monitor colour.
ATW (automatic white balance) test track automatic white balance, color reduction degree on test, switch the light source, such as natural light, fluorescent lamp, lamp light source, such as good surveillance cameras under different color temperature switch can quickly find the right color, some machines, when under the light bulb suddenly moved out of the window, will the whole slant red, or through the window quickly moved to the light, color slant blue, white balance is poorly designed.

Because testing the image effect of CCD plate machine is the main content of our detection, today we talked about it in detail. I hope you can have a good taste of it. No test figure friends can contact shenzhen kung fu, we can offer you free CCD machine testing figure, if you have any good test method is also hope you to contact us, shenzhen into jia technology thanks to everybody!