For the pipeline endoscope, there are many factors affecting the imaging definition, including the number of CMOS pixels used in China, the resolution of the display, lighting technology, etc. the HD index of the pipeline endoscope usually refers to the number of CMOS pixels, also known as the resolution. It is generally believed that the higher the number of CMOS pixels, the clearer the imaging.

但是这也不是一定的，因为像素数与CMOS尺寸存在一定关系，在有限的CMOS尺寸下，像素数往往也有一个黄金值，并非越高越好。像素数越多，每个像素的尺寸越小，小到一定程度反而会影响整体的成像质量。

However, this is not certain, because there is a certain relationship between the number of pixels and CMOS size. Under the limited CMOS size, the number of pixels often has a gold value, which is not the higher the better. The more pixels, the smaller the size of each pixel, which will affect the overall imaging quality to a certain extent.

早期的管道内窥镜，探头的视野比较小，一般在75o-150o之间，随着现在技术的发展，视野可以扩大到120°，深度也可以更加自由的调节。常用的管道内窥镜摄像系统，一般适用于直径25-120mm的管道内部检测使用，适用于人体无法直接进入和观察的管道内壁的检查。

In the early pipeline endoscope, the field of vision of the probe was relatively small, generally between 75o and 150O. With the development of current technology, the field of vision can be expanded to 120 °, and the depth can be adjusted more freely. The commonly used pipeline endoscope camera system is generally suitable for the internal inspection of pipelines with a diameter of 25-120mm, and for the inspection of the inner wall of pipelines that cannot be directly entered and observed by the human body.

现有国产内窥镜主流像素一般为45万像素，但有部分研制实力强的内窥镜厂家能够供给100万甚200万像素的产品，性能能够与进口产品媲美。当然相对于一般像素的来讲，也会更高一些。

At present, the mainstream pixels of domestic endoscope are generally 450000 pixels, but some endoscope manufacturers with strong development strength can supply products with 1 million or even 2 million pixels, and the performance can be comparable with imported products. Of course, the price will be higher than that of ordinary pixels.