According to the record mode to classify the time, the camera type can be divided into analog record and digital record mode, the current type of camera operation is digital record mode, this is due to analog record mode after After copying and copying many times, the simulated lamp symbol will be lost. That is, the more copies are copied, the worse the picture quality is. After the digital record mode flashes, the analog record mode will gradually wear out. Loss of the meaning of his existence; the digital record mode can only obtain the picture quality that is completely faithful to the original shooting because it only needs to go through the simple number combination of the processes “1†and “0â€. In the future, it will also be recorded digitally. Mainly.
There are many kinds of cameras and the basic principles of their work are the same: the optical image signals are converted into electrical signals for storage or transmission. When we shoot an object, the light reflected by this object is collected by the camera lens so that it is focused on the light-receiving surface (such as the target surface of the camera tube) of the imaging device, and then the light is converted into electrical energy through the imaging device. "Video signal". Photoelectric signals are very weak, need to be amplified by pre-amplifying circuits, and then processed and adjusted through various circuits. The resulting standard signals can be sent to recording media such as video recorders, or transmitted through a transmission system or sent to a monitor. display.
The conference camera belongs to the security system. The image generation is mainly from the CCD camera. CCD is the abbreviation of Charge Coupled Device. It can convert light into charge and store and transfer the charge. It can also store The charge is taken out to make the voltage change, so it is an ideal camera component. The CCD camera that is composed of it has a small size, light weight, is not affected by the magnetic field, has the characteristics of anti-vibration and impact, and is widely used.
CCD cameras can be roughly divided into the following categories:
A. Dividing by imaging color (1) Color camera: It is suitable for identifying the details of a scene, such as identifying the color of clothing or scenery. Because of the color, the amount of information is increased. The amount of information is generally considered to be 10 times that of a black-and-white camera.
(2) Black-and-white camera: It is used in areas with insufficient light and areas where lighting equipment cannot be installed at night. When monitoring the location or movement of a scene, a black-and-white camera with a higher resolution than a color camera can be used.
(3) Digital Network Cameras: The use of the network to transmit video images generally uses the pixel level to express its clarity. Currently, there are 350,000, 1 million, 1.3 million, 3 million, and even 5 million pixels high-definition web conference cameras.
B. Divided by the size of the CCD target surface of the image pickup element (1) The size of the 1in target surface is 12.7mm in width X 9.6mm in height and 16mm in diagonal line
(2) The dimensions of the 2/3in target surface are 8.8mm wide, 6.6mm high, and 11mm diagonal
(3) 1/2in target surface size width 6.4mmX height 4.8mm, diagonal 8mm
(4) 1/3in target surface size is 4.8mm wide, 3.6mm high, and 6mm diagonal
(5) 1/4in target surface dimensions are 3.2mm wide, 2.4mm wide, and 4mm diagonal
(6) 1/5in is under development, and no formal product has yet been introduced. In addition, the CCD camera has the PAL system and the NTSC system, and it can be divided by the image signal processing method or the camera structure.
There are many kinds of cameras and the basic principles of their work are the same: the optical image signals are converted into electrical signals for storage or transmission. When we shoot an object, the light reflected by this object is collected by the camera lens so that it is focused on the light-receiving surface (such as the target surface of the camera tube) of the imaging device, and then the light is converted into electrical energy through the imaging device. "Video signal". Photoelectric signals are very weak, need to be amplified by pre-amplifying circuits, and then processed and adjusted through various circuits. The resulting standard signals can be sent to recording media such as video recorders, or transmitted through a transmission system or sent to a monitor. display.
The conference camera belongs to the security system. The image generation is mainly from the CCD camera. CCD is the abbreviation of Charge Coupled Device. It can convert light into charge and store and transfer the charge. It can also store The charge is taken out to make the voltage change, so it is an ideal camera component. The CCD camera that is composed of it has a small size, light weight, is not affected by the magnetic field, has the characteristics of anti-vibration and impact, and is widely used.
CCD cameras can be roughly divided into the following categories:
A. Dividing by imaging color (1) Color camera: It is suitable for identifying the details of a scene, such as identifying the color of clothing or scenery. Because of the color, the amount of information is increased. The amount of information is generally considered to be 10 times that of a black-and-white camera.
(2) Black-and-white camera: It is used in areas with insufficient light and areas where lighting equipment cannot be installed at night. When monitoring the location or movement of a scene, a black-and-white camera with a higher resolution than a color camera can be used.
(3) Digital Network Cameras: The use of the network to transmit video images generally uses the pixel level to express its clarity. Currently, there are 350,000, 1 million, 1.3 million, 3 million, and even 5 million pixels high-definition web conference cameras.
B. Divided by the size of the CCD target surface of the image pickup element (1) The size of the 1in target surface is 12.7mm in width X 9.6mm in height and 16mm in diagonal line
(2) The dimensions of the 2/3in target surface are 8.8mm wide, 6.6mm high, and 11mm diagonal
(3) 1/2in target surface size width 6.4mmX height 4.8mm, diagonal 8mm
(4) 1/3in target surface size is 4.8mm wide, 3.6mm high, and 6mm diagonal
(5) 1/4in target surface dimensions are 3.2mm wide, 2.4mm wide, and 4mm diagonal
(6) 1/5in is under development, and no formal product has yet been introduced. In addition, the CCD camera has the PAL system and the NTSC system, and it can be divided by the image signal processing method or the camera structure.
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