SHOWLOGIX software that warps input from capture cards.Warpalizer, software using this technique.This adds a latency to the display system that could be a problem in simulators that need fast response time, for instance fighter jet simulators.
The process unit also needs several lines of image information before it can start sending out the warped image. The problem with this technique is that it depends on the type of signal and the quality of the signal from the graphics card to warp it correctly. This processing unit was inserted between the graphics card and the projector.
The first warping technologies used a hardware image processing unit to warp the image. With this technique a “filter” is inserted on the edge that fades the image from 100% light strength ( luminance) to 0% (the lowest luminance depends on the contrast ratio of the projector). This is solved by using a technique called edge blending. A problem with using several projectors on the same screen is that the edges between the projected images get about twice the amount of light. To make it possible to cover a dome with a 360 degree view you need to use several projectors.
These are usually used in vehicle simulators, for instance boat-, car- and airplane simulators. The softwarp can be used to project virtual views on curved walls and domes. The information from the sensors is sent to the software so that it can analyze the data and calculate the curvature of the projection screen. There are several techniques to auto calibrate the warping by projecting a pattern and using cameras and/or sensors. The problem is to know how the image should be warped to look correct on the curved screen. This can be done in real time by inserting the softwarp as a last step in the rendering cycle. Softwarp is a software technique to warp an image so that it can be projected on a curved screen.
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