What is a time lapse and what does a time lapse mean in a nutshell

Time-lapse photography is also known as time-lapse photography (English: time-lapse photography), also known as time-lapse photography on dash cams. It is a shooting technique that compresses time.

It shoots a group of **or**, and the post-production is carried out in series or **frame extraction, compressing the process of minutes, hours or even days and years in a relatively short period of time. In a period of time-lapse photography**, the process of slow change of an object or scene is compressed into a relatively short period of time, presenting a strange and wonderful scene that is not normally perceptible to the naked eye. Time-lapse photography can be thought of as the opposite of high-speed photography.

Time-lapse photography is often used to photograph urban landscapes, natural landscapes, astronomical phenomena, urban life, architectural manufacturing, biological evolution, and other subjects. At present, in addition to cameras, mobile phones and dash cams also have this function.

In fact, for digital cameras, there will be this phenomenon - shooting time-lapse. The so-called "shooting delay" means that after the first shot is taken, the second shot can be taken at an interval of time. This is not the case with traditional cameras, but digital cameras almost all have this interval, and some models even have a delay between pressing the shutter and the actual action of the camera.

Due to the time-lapse nature of digital camera recordings, not all digital cameras are suitable for shooting in quick succession in this case.

So what is the reason for this shooting delay? It turns out that after pressing the shutter, the camera needs to spend a few seconds internally processing, generating an image, compressing it, then saving the image in the internal memory, the CCD clearing the charge, and finally the camera internally resetting. That is to say, the digital camera shoots through the process of "optical signal, analog electrical signal, digital electrical signal recorded on the storage medium", and it takes time to convert and record, especially the recording takes a lot of time.

Due to the relatively small storage buffers in digital cameras, the continuous shooting speed of all existing digital cameras is not very fast. Once all the work is done, it's time to shoot the next shot. However, as the camera's internal memory grows and compression technology improves, this delay will become shorter and shorter.

While many digital cameras offer continuous shooting, there are also digital cameras that support high-speed continuous shooting that can take several consecutive images at once. However, it is not difficult for you to notice that in ordinary digital cameras, most of them can only shoot low-resolution ** continuously, because the amount of data in high-resolution ** is very large, and it must be processed for a certain amount of time. The shooting delay time of different models of digital cameras varies from a fraction of a second to a few seconds or even a dozen seconds.

Of course, in order not to miss the shooting moment, the shorter this delay and the faster the response, the better. Moreover, the continuous shooting data provided by some manufacturers is not achievable in practice, so when you actually buy it, you should use it yourself and feel the delay time - you must use the same resolution. That's the best way to go.

That is, the moment you press the shutter button, you will not immediately take a picture of the current thing, it will be extended for a while, and then you will shoot.

Fix the camera and don't move, shoot the same frame for a while, and then compress the time. It's like shooting clouds flowing in the sky, shooting for 30 minutes, and then compressing it into 10s, the clouds will go very fast You can also shoot the sunrise, traffic, and water.