The resolution of an analog camera is calculated based on the number of horizontal scanning lines. The resolution of a network camera is calculated based on the pixels on the sensor (CCD/CMOS chip).
The approximate relationship between the two is as follows:
Analog Camera | Network Camera | |
---|---|---|
330 Horizontal TV lines | = | 512x492 pixels |
330 Horizontal TV lines | = | 512x582 pixels |
400 Horizontal TV lines | = | 640x480 pixels |
470 Horizontal TV lines | = | 768x492 pixels |
470 Horizontal TV lines | = | 768x582 pixels |
800 Horizontal TV lines | = | 1280x960 pixels |
When using a network camera's digital image, you can choose the image quality yourself. However, remember that the higher the image quality, the more data is involved. Images with more data will take longer to transmit and require more hard drive storage space.
Some basic principles regarding the amount of data in images:
For estimates regarding resolution, bandwidth, and storage capacity, please refer to the following sections:
蘊藏許多助人的知識與智慧。