What if the surveillance camera doesn't display the picture?

There are many cases where the monitor does not display the picture, and the exclusion method is generally used. First, look at whether there is a problem with the software driver, whether there is a bug in the software, and then look at whether the camera is damaged, blocked, or whether there is a problem with the computer system.

Reason:

1, first look at the contact, acquisition card, camera.

2, the acquisition card driver problem, reinstall the driver.

3, hardware problems, need to find professionals to repair.

Solution:

1. Reinstall the monitor driver.

2. Check whether the camera is damaged or blocked, and check whether the connecting cable is damaged.

3. Try a different computer. If the monitor returns to the screen, there is something wrong with the computer system. Just reinstall the system.

Extended data:

Monitor workflow:

According to different applications, the following mainly explains the control and process of monitoring camera in digital film shooting:

1. Use the monitor to control the exposure.

First, adjust the monitor to a relatively standard state, and adjust this state at any time during shooting. The high-definition monitor has a waveform diagram, which is of great practical significance for controlling exposure and distinguishing the details of light and dark parts.

2. Automatic aperture control exposure

At this time, the automatic aperture is used as an exposure instrument, and the photographer should have a particularly clear understanding of the dynamic range curve of the monitoring camera.

3. zebra crossing control exposure

A zebra crossing is usually designated with an amplitude of 90%-95% of the signal level. The high-definition surveillance camera adopts two-stage zebra stripe design. The first stage is set to 70%, that is, the level amplitude of 700 mV video signal is 60%-65%, which is basically the level value of video signal corresponding to 23% wampee reflectivity. The other is 100% zebra crossing, in which 70% corresponds to the gray area in the image, and 100% is the bright part.

In 2006, the number of films shot by digital equipment reached 1 10, accounting for 1/3 of the national output. The technical differences between digital film and film film in actual shooting are mainly the control of tone, color and exposure, and the shooting process is also different.

In the exposure process of digital film, lens-beam splitter -CCD-A/D analog-to-digital conversion-black spot correction-gain adjustment-white balance-stray light correction-detail adjustment-color giant array-inflection point adjustment-GMA adjustment-white cutting and black cutting.

The exposure of film movies is controlled by exposure meters, which are also used by some digital photographers. Generally speaking, the sensitivity of digital cameras is equivalent. For SONYF900, it is equivalent to 3200K color temperature, shutter 1/48 seconds, and 320 degrees in 24P mode.

Exposure meter is rarely used in digital movies because it is set by exposure meter according to the photographic characteristics of film emulsion. Film is sensitive to blue and ultraviolet light, while digital film is sensitive to red light.

Video surveillance camera, the product has the characteristics of clear image, vivid color, high line number and low illumination. With the continuous investment in technology research and development, the surveillance camera will promote the market innovation process with the growth of its CCD technology and image sensor solution lineup.

References:

Baidu encyclopedia-monitor

Baidu Encyclopedia-screen display interface