IMAGE DATA PROCESSOR SYSTEM

摘要

An image data processor system includes a plurality of subprocessors arranged in a pipeline for carrying out functions of pixel normalization, background suppression, spot and void removal, image scaling, and size detection. Processed image data contain useful image formation data and background feature a background suppression scheme used to convert each pixel value to preselected values in a smaller range in order to facilitate data processing such as compression and scaling. The initially presented image data in the form of an array of multi-bit pixels having plural scale values are filtered. The scale value pixels are converted to an array of binary pixels in which each pixel is associated with either background or image formation data. Patterns of pixels are used to transform a center pixel in a manner to remove isolated spots or voids from the image. Processed imaged pixel data are analyzed to indicate the size of the document being scanned. Processed image pixel data permit a scaling processor to change the size of the image for further processing.