In an information registering and retrieving apparatus, primary information of image signals converted from an original document or documents is registered by adding secondary information to the primary information and any desired primary information is retrieved by utilizing the secondary information. The apparatus is provided with a first output reservation device for storing, in a storage device, desired secondary information designated in the entire secondary information retrieved on the bas...

The invention is a method and apparatus primarily for generating pixel representations for the video display of three-dimensional objects projected onto a two-dimensional pixel plane. The scanlines of the pixel plane are associated into N interlaced sets, each set having as members only scanlines having an equivalent vertical pixel location Modulo N. The image memory unit block utilizes both serial and parallel processing. For each color (red, green and blue) and for calculating depths, each ima...

This invention relates to a device for pumping high delivery volumes of a liquid, with at least two pumps each forming a single structural unit, which are jointly hooked up to a pressure line on the delivery side, and coupled to a single drive. The device according to the invention further develops the known device described in greater detail above in such a way as to provide an easily transported and space-saving device. This is achieved by virtue of the fact that at least one pump (4) is posit...

A system is disclosed for subdividing parametric patches for use in a computer graphics system to develop images. The system utilizes initial data, provided as by an interactive user, to represent control points for an initial patch from which the system rapidly computes control points for subpatches using parallel processors. The disclosed system is recursive so that each level of subdivision leads to greater refinement of an initial patch. In one embodiment, the processors in the system comput...

A mapping-type data signal optimizer performs a code-point sorting function to optimize downloading of programmed symbols. A present-state list of values of programmed symbols already downloaded to a peripheral device is sorted, and a similar intended-state list of programmed symbols intended to be downloaded is likewise sorted. A search is performed to detect any commonalities that might exist between the present-state and intended-state programmed-symbol values, even under differing programmed...

A host system executes one or more application programs which results in graphic data structures. These graphic data structures are then continuously and asynchronously traversed. Traversal requests by competing application programs are scheduled and performed so that each application views the graphics processing as its own. The traversal and ordering of traversal requests provide efficient use of resources for multiple application programs.

A bit-image printer is disclosed, having a page memory, a font memory and a font library. Fonts are selected from the library for use in composing a page image in the page memory. Loading of font characters into the page memory is controlled by the position of a cursor located within page memory. The font characters include cursor parameters which control the loading of the character into page memory, based upon current cursor position, and control movement of the cursor to a new location, in pr...

An electronic calculator having a graph display function which displays a graph of a desired function on a liquid-crystal display screen, within a designated range, input from a keyboard. The electronic calculator can change the range using a predetermined point or range on the screen as the center, thus enlarging or reducing the displayed graph to a desired magnification.

A compact electronic calculator having a graph display function of the invention has function keys for inputting functional formulas, a memory for storing an input functional formula, range input keys for inputting range data for variables in the formula, a memory for storing the range data, and a read-only memory (ROM) for storing a control program which sequentially calculates the values of the dependent variable for the independent variable with an ALU in accordance with the functional formul...

In order to improve the efficiency of test and debug procedure based on delarative program understanding of a program described by a logical language, the operation which has been executed for each procedure is grasped. On the basis of information relating to the grasped operation, the operation range of each procedure is expressed clearly by making thick only sides which have actually operated among four sides of a box-shaped figure surrounding each head term and end body term of each clause in...