Projection stitching, also known as projection stitching, refers to two or more projectors projecting and stitching a large picture at the same time, without using projection edge fusion processing, directly allowing each projector to project the picture directly together.

I. Projection Stitching Equipment and Principle

Projection splicing system mainly consists of signal source, signal processing equipment, picture splitter, projector, projection screen, control system and so on. On the way to the large screen, the signal source passes through three processes: signal processing equipment, picture splitter and projector. The signal source consists of various DVD players and notebook computers. Signal processing equipment, including video matrix, RGB matrix and cable, is the channel between signal source and picture divider, which directly affects video quality. Matrix bandwidth and switching delay time are important parameters. Cable quality has a great impact on the signal. Each cable transmits a signal with a certain transmission distance at each resolution. If the distance exceeds, the image will become worse.

The most important thing in the system is the picture divider and projector: the picture divider achieves the picture segmentation of the signal source. For example, you are spliced by three projectors. The picture divider divides the signal source into three pictures, one projector projects one third of the signal source picture, thus forming a complete signal on the large screen. Frame. The choice of projector is the most important, because there is no edge fuser, the overlap of the two projector pictures will occur at the intersection of the two projector pictures, which will lead to the enhancement of brightness in the area and blurred signal. It is difficult to adjust the picture for ordinary commercial projection because of the absence of electric lens displacement technology. When doing this projection splicing, all of them are selected. Select project projector.

2. Disadvantages of Projection Mosaic

1. There are irrevocable screen physical seams.

2. There are irremovable projection optical joints.

4. Severe chromatic aberration exists

III. Development Trends

Projection stitching appeared in 2002 or so, because there is no software for projection edge fusion, and the market needs large screen projection display, so people think of the method of hard stitching several projection pictures together, but because of the shortcomings of projection stitching itself, and in recent years, the rise of projection edge fusion, the market has now. Hard projection stitching is rarely used.