Abstract: A method of detecting fields in document images includes: receiving a codebook comprising a set of visual words, each visual word corresponding to a center of a cluster of local descriptors; calculating, based on a set of user labeled document images, for each visual word of the codebook, a respective frequency distribution of a field position of a specified labeled field with respect to the visual word; loading a document image for extraction of target fields; calculating a statistical predicate of a possible position of a target field in the document image based on the frequency distributions; and detecting, using the trained model, fields in the document image based on the calculated statistical predicate.

Abstract: Apparatus for changing the rotation speed of a workpiece holder axle relative to the axle of a drive shaft, the tangential acceleration of this movement, and the pressure between the surface of workpieces and lapping tools. These changes are set cyclically, directly in the apparatus for finishing. The machines for the realization of such control of the finishing process are equipped with units which are capable of regulating the value of the complex eccentricity of holder rotation and have independent drive systems for adjusting the kinematic factors in the course of finishing. This ensures uniform abrasion over the entire working surface of the lapping tools.