Resolution, or sensor pixel, is often referred to as the number of pixels camera, is one of the important indicators to measure the camera, some products will be marked on the box of 300,000 pixels or 350,000 pixels. In practice, the higher the pixels of the camera, shooting out of the image quality is better, but on the other hand also not pixels, the higher the better, for the same picture, its resolution image pixel and the higher the product ability is stronger, but it records the amount of data will be much bigger, so the requirement of storage devices are much higher, so in the choice of using the current mainstream products. Due to the influence of camera price, computer hardware, imaging effect and other factors, cameras on the market are basically sold at the level of 300,000 pixels. And because CMOS imaging is not ideal at high pixels, the dominant market for high pixel cameras is still CCD cameras. It is worth noting that some resolution labels refer to the interpolation resolution that these products can achieve by using software. Although the accuracy of the obtained images can be appropriately improved, there is still a certain gap between them and the resolution of hardware.
The capture ability of video is realized by software, so the requirements on the computer are very high, that is, the processing power of the CPU should be fast enough, and the capture ability is not the same with different requirements on the picture. At present, the maximum resolution of the picture captured by the camera is 640×480. No digital camera can capture 30 frames per second at this resolution, so the picture will jump. What is more realistic is that at the resolution of 320×240, it is possible to achieve the capture index of standard rate depending on the combination of hardware and software. Therefore, for complete video capture speed, it is only a theoretical index.
In addition to the above mentioned, other factors to consider include the attached software, camera appearance, lens sensitivity, built-in microphone and so on