Abstract: A system for recognizing and locating in an image, printed data of a known spatial characteristic. A digital matched filter is used to identify the presence of the printed data via an auto correlation between the filter coefficients and the printed data. When an auto correlation is identified, approximate areas are selected and further processing is undertaken only within such areas.

Abstract: A system for compressing information arranges unprocessed information into a plurality of data planes. The data planes are converted into a combined planar data output. The combined planar data output is created by regrouping data elements which make up the unprocessed information. The regrouping is such that the entropy of the unprocessed information is increased. This provides increased compressibility of the data. The combined planar data output is compressed using standard information compression techniques. Data is reconstructed by uncompressing compressed data and rearranging it into its original format.

Abstract: A selection agent within a symbol determination system receives input character codes (ICCs) each with an associated confidence factor (CF) from a plurality of OCR processors. The selection agent selects the mathematically most probable character (MPC) from among the ICCs based on the relative values of the joint confidence factor (JCF) in accordance with the relationship:JCF.sub.n =1-(1-CF.sub.1)(1-CF.sub.2) . . . (1-CF.sub.n).for n like ICCs from N OCR processors.

Abstract: A grid apparatus which has a multiplicity of ribbon-shaped grid elements stretched in tension and attached to a frame which comprises a pair of support bars and a pair of resilient support members. Metallic members which have a larger thermal expansion coefficient than the resilient support members are connected to the reverse surfaces of the resilient support members opposite the side to which the grid-elements are attached. In the grid apparatus during heat treatment, thermal creep of the grid elements is prevented so that the tension of the grid elements will remain high when the normal temperature state is resumed. A method of making such grid apparatus includes an additional heat treatment such as a blackening process after the reduction of the tension applied to the grid elements by the resilient support members and the support bars, hence preventing thermal creep of the grid elements to produce a high-reliability with high tension of the grid elements.

Abstract: A method and apparatus for modifying an image data signal has a serial channel for obtaining a desired number of current M-bit patterns from the image data. Unique bit patterns are recognized in the current bit patterns, and new bit patterns are generated, each being specific to the detected unique bit pattern. The current and new bit patterns are combined in a predetermined manner to modify the image data as desired. For example, if the unique bit patterns are recognized as dark images on a leading edge of an image, the new bit patterns are generated and combined with the current bit patterns to lighten the image, particularly at the leading edge to improve stripping of the print media on which the image is printed from a fuser roll of the printer.

Abstract: An original reader apparatus for reading an image formed on an original placed on an original table by moving a fluorescent lamp, an optical system, a photoelectric converter and the like disposed on a carriage. The timing of driving a stepping motor for moving the carriage is controlled by use of a 1/n-line synchronization timing signal during both an acceleration operation and a constant speed operation, thereby smoothly moving the carriage along the axis perpendicular to the axis along which the photoelectric converter reads an original, without deviation of the timing when an acceleration operation is changed to a constant speed operation.

Abstract: A process, and a corresponding device, for temporal image interpolation with corrected movement compensation, respectively use a consistency analysis step or circuit to analyse the defects in a field of movement which results from the movemenet estimation process step or device to perform either compensated-movement interpolation, or linear interpolation, depending whether the field of movement is estimated to be corrected or defective for the current point of the frame to be interpolated. Preferentially, to avoid abrupt transition between the two modes of interpolation, a process step or circuit enables intermediate values to be found which take into account the two modes of interpolation in the transition zones.

Abstract: A symbol analyzing system processes spectral power data of an input test symbol for deriving line width and line count information about the symbol, and for generating a reliability confidence for each line count. An excellent controller progressively reduces the spectral power by progressively excluding a larger portion of the upper frequency end of the power spectrum. The excluded power levels are compared to a set of predetermined reference power levels from an ideal reference symbol. Each excluded power level that compares with a reference level is matched with reference coefficients Kw and Kc for that reference level. Each matched excluded power level has a remaining non-excluded power level Pbw in the non-excluded bandwidth BW at the lower end of the frequency spectrum. These included power levels and bandwidths are matched with the reference coefficients.

Abstract: An image signal representing radiation images is detected from a recording medium on which the radiation images have been recorded in a subdivision pattern. The whole image recording area of the recording medium is divided into four regions which have the same shape and the same size and which are vertically and horizontally adjacent to one another. Calculations are made from the image signal in order to find characteristic amounts which represent resemblances in image between the divided regions which are vertically adjacent to each other and between the divided regions which are horizontally adjacent to each other. The subdivision pattern of the radiation images is determined by judging that the divided regions which are found as resembling each other in image are the subdivisions into which the whole recording area of the recording medium was divided when the radiation images were recorded thereon.

Abstract: An apparatus for detecting a distribution of a surface potential on a measured object comprises a reading head opposing the measured object. The reading head includes an optical modulator subjected to an electric field representative of the surface potential distribution. The electric field applied to the optical modulator is varied in an alternating manner.