Abstract: A data entry and error embedding system in which, first, a document is bitmapped and recorded in a first memory. Then, it is displayed, and portions of it to be replicated by data entry are underlayed by a window, into which window replicated data is entered in location and size such that it is juxtaposed just below that which is replicated, enhancing the accuracy of replication. Second, with this format in place, selected portions of the replicated data are altered by the insertion of character or word substitutions, thus the embedding of errors. Finally, a proofreader would endeavor to correct the error embedded data and a record of his or her changes recorded. In this manner, the skill level of the proofreader and accuracy of the data are computed.

Abstract: An Icon window display area taking precedence over all other display areas is disposed in the display screen. A window which becomes invisible at generation of a new window, a window size change of an existing window, or a position change of an existing window is reduced to a predetermined size so as to be displayed in a new Icon window display area.

Abstract: A solid modelling system for generating a spatial representation of an object defined by a structure having a plurality of linked nodes representing the object in terms of solid geometric primitives combined by a logical expression, which is adapted to recognize redundant primitives automatically. Bitmap generation logic (BGL) is provided for traversing at least certain of the nodes in the structure for generating a bitmap representing the part of the logical expression defined in the traversed nodes and redundant primitive logic (RPL) is provided for testing the bitmap for logical redundancies indicative of redundant geometric primitives. Each bit in the bitmap is representative of a respective one of the constituents of the primitives, a constituent being the volume formed by the intersection of primitives or their complements, and, in order to test for the redundancy of a primitive u, the RPL tests for equivalence of the corresponding utrue and ufalse constituents in the bitmap.

Abstract: A device for editing and displaying an image uses a medium such as a transparent film or a magnetic card on which are recorded both display data and commands for specifying how the display data should be processed. Such data are received by the device through a camera, a magnetic record reader and/or the like and stored in a memory device. Digital image processing is performed on such stored data according to the commands and an image according to the processed data is displayed.