Double exposure refers to multiple exposures on the same negative. It is a skill that many people must play when contacting the camera. The mysterious and unspeakable visual effect often makes people indulge in it. At present, medium and advanced automatic cameras have multiple exposure function. Multiple exposure can be set by using function settings.
As early as the era of film SLR, many photographers and photography lovers superimposed two or more lighting negatives through double exposure to achieve the purpose of increasing the illusory effect of pictures.
After entering the digital age, it is easier to realize double exposure. We can import the captured pictures into the computer, and then overlap the pictures with image processing software to achieve the effect of double exposure. Moreover, when overlapping, the picture can also be partially enlarged or reduced. This digital “bottom stacking” method greatly increases the convenience of double exposure.