Abstract: A digitizing CCD array system calibrates the CCD array precisely, masks a data medium automatically, and recovers data from the data medium accurately. The system uses a substantially opaque film mask to eliminate the effects of diffused light and flare during a digitization process when the data medium is smaller than an illumination source. A multiple optical density filters are used in calibrating the CCD array to provide a precise optical density reference for digitization of the data medium. In addition, the invention increases contrast sensitivity in data recovery by selectively switching the CCD array on and off to control the duration of multiple exposure times, i.e., integration periods, during a single line scan.

Abstract: An apparatus and method using non-destructive testing and evaluation analyzes pipes to accurately measure the depth of corrosion and/or erosion in the pipe. Two penetrameter shims are attached to the outside surface of the pipe near the area of corrosion. Then, a radiograph of the pipe in the area of corrosion is generated using an X-ray source and an X-ray sensitive film. The radiograph is subsequently digitized, and the digital information is entered into a computer. A computer operator (user) is then asked to input several parameters concerning the diameter of the pipe, the thickness of the shims, etc., using, for example, a keyboard and to select the areas of interest using, for example, a computer mouse. All the while the computer operator is navigated through several user-friendly screens in a window environment driven by a Graphical User Interface.

Abstract: A digitizing CCD array system calibrates the CCD array precisely, masks a data medium automatically, and recovers data from the data medium accurately. The system uses a substantially opaque film mask to eliminate the effects of diffused light and flare during a digitization process when the data medium is smaller than an illumination source. A multiple optical density filters are used in calibrating the CCD array to provide a precise optical density reference for digitization of the data medium. In addition, the invention increases contrast sensitivity in data recovery by selectively switching the CCD array on and off to control the duration of multiple exposure times, i.e., integration periods, during a single line scan.