Infrared night vision/falling frame, Infrared night vision/falling frame, what does it mean

Infrared night vision/falling frame, Infrared night vision/falling frame, what does it mean

Infrared night vision

The visible light that the human eye can see is arranged from long to short according to the wavelength, which is red, orange, yellow, green, cyan, blue, and purple. The wavelength range of red light is 0.62~0.76μm; the wavelength range of purple light is 0.38~0.46μm. Light with a shorter wavelength than purple light is called ultraviolet light, and light with a longer wavelength than red light is called infrared light. The human eye cannot see infrared light. Because digital cameras use CCD to sense all light (visible light, infrared light, ultraviolet light, etc.), this causes the image captured to be very different from the image produced by our naked eyes that only sees visible light. In order to solve this problem, digital cameras have an infrared filter installed between the lens and CCD. Its function is to block infrared light from entering the CCD, so that the CCD can only sense visible light, so that the image captured by the digital camera is consistent with the image seen by our naked eyes.

Infrared night vision means that in the night vision state, the digital camera will emit infrared light that is invisible to the naked eye to illuminate the object being photographed. When the infrared filter is turned off, it will no longer block the infrared light from entering the CCD. The infrared light is reflected by the object and enters the lens for imaging. At this time, what we see is the image formed by the reflection of infrared light, not the image formed by the reflection of visible light. That is, images that are invisible to the naked eye in dark environments can be captured at this time.

Drop

The ending picture of a moving shot. It is required to be smooth and natural when switching from moving to fixed picture. What is more important is accuracy, that is, the picture should be stopped just right according to the pre-designed scene range or the position of the main subject. In scenes with performances, the picture should not be stopped too early or too late according to the action of the characters. When the picture stops, it should be of appropriate length to bring the performance to an end. The composition of the falling picture should be accurate, but under special conditions, when the moving shots are connected, the picture can be kept steady and the method of connecting movement to movement can be adopted.