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.

但是這也不是一定的，因為像素數與CMOS尺寸存在一定關系，在有限的CMOS尺寸下，像素數往往也有一個黃金值，并非越高越好。像素數越多，每個像素的尺寸越小，小到一定程度反而會影響整體的成像質量。

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.

早期的管道內窺鏡，探頭的視野比較小，一般在75o-150o之間，隨著現在技術的發展，視野可以擴大到120°，深度也可以更加自由的調節。常用的管道內窺鏡攝像系統，一般適用于直徑25-120mm的管道內部檢測使用，適用于人體無法直接進入和觀察的管道內壁的檢查。

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.

現有國產內窺鏡主流像素一般為45萬像素，但有部分研制實力強的內窺鏡廠家能夠供給100萬甚至200萬像素的產品，性能能夠與進口產品媲美。當然相對于一般像素的來講，價格也會更高一些。

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.