Rubber Sheeting Algorithm

Fig 1 daugman s rubber sheet model shows how a circular shape iris can be.

Rubber sheeting algorithm.

Inherent errors in the conversion process from maps to digital information cause variations in the location of common boundary lines between adjacent maps. Rubber sheeting preserves the interconnectivity between points and objects through stretching shrinking or reorienting their interconnecting lines. The sources of data are vectorized maps from adjacent scanned sheets not necessarily of the same scale or with the same accuracy which will be part of a future geographical information system gis database. Corrects randomly deformed maps with reference to new maps provided with a grid of control points.

A rubber sheeting algorithm for non rectangular maps1 doytsher yerahmiel. It achieves an ideal balance to create an all purpose weather resistant rubber. The rubber sheeting process is defined by a linear spreading of the random corrections given at each point on the map perimeter. For each point the corrections are independent of other corrections on the x and y axes.

In order to eliminate these discrepancies and define a continuous database the popular practice is to. The algorithm has four stages and resembles the spreading of soap bubbles limited by a polygonal ring changing its shape and size. Epdm sheet rubber is a versatile blended sheet epdm sheet rubber is a versatile blended sheet composed of ethylene propylene diene monomer and styrene butadiene rubber. A procedure for adjusting the coordinates of all the data points in a dataset to allow a more accurate match between known locations and a few data points within the dataset.

The corrections must be diminished based on two assumptions. The purpose is to develop a simple tool to automatically rectify a large number of images using four corner coordinates known. A raster map file gives you the capability to adopt some sophisticated mathematical algorithms transformations which allow you to reach a precision up to 10 times more accurate than a manual inspection. The proposed system then evolved and achieved better performance in time.

For the geometric adaptation rubber sheeting algorithms have been proposed where in the simple case a vector field is calculated from some given object correspondences doytsher 2000. After a few years of scientific experiments daugman proposed and developed a high confidence iris recognition system and published the results in 1993 7. For this reason epdm material is an excellent medium for outdoor uses.