The pixel density analysis of the USB camera module needs to be comprehensively considered in combination with the number of pixels, nghị quyết, quality of the photosensitive device and application scenarios. The following is a specific analysis:
Pixel density and resolution: Pixel density refers to the number of pixels per unit area and is an important indicator for measuring the clarity of an image. Nghị quyết (such as 720P, 1080P, 4K) is determined by the number of horizontal and vertical pixels. Ví dụ, the resolution of 1080P is 1920×1080 pixels, with a total of approximately 2.07 triệu pixel. High resolution means more pixels, but it should be noted that pixel density is also affected by the size of the sensor. Ví dụ, at the same resolution, the smaller the sensor size, the higher the pixel density. Tuy nhiên, an excessively high pixel density may lead to a decline in low-light performance.
Pixel density and image quality: Pixel density is not necessarily the higher the better. High pixel density can capture more details, but it needs to be combined with high-quality photosensitive devices (chẳng hạn như CCD hoặc CMOS) and lenses. If the sensor quality is poor or the lens resolution is insufficient, high pixel density may lead to increased noise and decreased color reproduction. Ví dụ, although low-end cameras are claimed to have high pixels, due to the poor quality of their photosensitive devices, their image quality is still inferior to that of high-end cameras.
Application scenarios and pixel density selection: Different application scenarios have different requirements for pixel density:
Monitoring system: High pixel density is required to capture details, such as face recognition or license plate recognition. 4K or higher resolution is recommended.
Smart home: Scenarios such as facial recognition have relatively low requirements for pixel density, and 2 ĐẾN 5 million pixels are sufficient to meet the needs.
Industrial inspection: High pixel density is required to ensure the detection of minor defects. 5 million or higher pixels are recommended.
Video conferencing: 1080P resolution (2 triệu pixel) is usually sufficient, but it is necessary to pay attention to the balance between frame rate and bandwidth.
Other influencing factors:
Ambient light: Trong điều kiện ánh sáng yếu, high pixel density may lead to an increase in noise, and it is necessary to combine supplementary lighting technology or low-light optimization algorithms.
Chất lượng ống kính: The resolution of the lens must match the pixel density; otherwise, high pixel density cannot bring out its advantages.
Cost and Budget: Cameras with high pixel density are usually more expensive, and performance and cost need to be weighed against the budget.