Abstract: There is described a method for generating an image view from at least one input image for a 3D display using a backward processing enabling post processing for handling holes in the image view.

Abstract: There is described a method for generating an image view from at least one input image for a 3D display using a backward processing enabling post processing for handling holes in the image view.

Abstract: The invention provides a method of receiving and/or transmitting information in a well drilled in a geological formation between a first location and a second location, the well comprising a casing communicating with the geological formation. The method comprises placing a first transducer at a first location, placing a second transducer at a second location. Transmitting an electric signal between the first and second transducers.

Abstract: An EM antenna for location on a pipe (10) surrounded by a casing (12). The antenna has a power source (21) for injecting a current across a first insulated section (25) of the pipe (10) and an electrode (22) for conducting the current from the pipe (10) to the casing (12). There is also a second insulated section (23) of the pipe arranged to operate together with the electrode (22) and first insulated section (25) for directing a path flow of the current. Such antennas are described both in relation to repeater arrangements as well as land and sea applications.

Abstract: The invention provides a method of receiving and/or transmitting information in a well drilled in a geological formation between a first location and a second location, the well comprising a casing communicating with the geological formation. The method comprises placing a first transducer at a first location, placing a second transducer at a second location. Transmitting an electric signal between the first and second transducers.

Abstract: A downhole electromagnetic telemetry unit for use with a tubing string (5) includes an insulated electrically conductive member (31) and a processing unit (15). The insulated electrically conductive member (31) is electrically coupled to the tubing string (5) at an upper measuring point (23) and a lower measuring point (25). The processing unit (15) is configured to process a voltage difference measured between the upper measuring point (23) and the lower measuring point (25) across the insulated electrically conductive member (31) and to derive therefrom a signal transmitted from a surface location (13).

Abstract: An EM antenna for location on a pipe (10) surrounded by a casing (12). The antenna has a power source (21) for injecting a current across a first insulated section (25) of the pipe (10) and an electrode (22) for conducting the current from the pipe (10) to the casing (12). There is also a second insulated section (23) of the pipe arranged to operate together with the electrode (22) and first insulated section (25) for directing a path flow of the current. Such antennas are described both in relation to repeater arrangements as well as land and sea applications.

Abstract: A well instrumentation system, comprising: a power and data supply; and a plurality of functional units attached to the power and data supply and distributed throughout the well, characterised in that the power and data supply comprises first and second substantially identical cables, and in that each unit comprises a first power supply channel and a first data channel connected to the first cable, a second power supply channel and a second data channel connected to the second cable, and a functional module which draws power from the first power supply channel or the second power channel module, and data from the first data channel or the second data channel. The power and data supply can comprise a surface unit that can be selectably connected to either the first or second cable. The selection of connection of the surface unit to one or other cable is effective to select the corresponding power and data channels in the functional units.

Abstract: The present invention relates to a memory management unit (MMU) for storing data values, said memory management unit comprising a memory unit (IM) which is adapted to store temporarily at least two sets of data values; and a controller (CTRL) which is configured such that it is able to store a first set of data values in a first area of the memory unit, and to store a second set of data values spatially adjacent to the first set of data values in a horizontal and/or in a vertical direction in such a way that a first part of the second set of data values is stored in a second area of the memory unit adjacent to the first area in a horizontal and/or in a vertical direction, respectively, and that the other part of the second set of data values to be stored which exceeds the memory unit size in a horizontal and/or in a vertical direction, respectively, is stored in at least one other area of the memory unit according to a torus principle.

Abstract: A method of mapping an input image split into input triangles including texels onto an output image also split into corresponding output triangles including pixels. Said method comprising the steps of: determining an inverse affine transform (BT) for transforming an intermediate rectangle triangle (T0) into an input triangle (T1); determining a direct affine transform (FT) for transforming the intermediate rectangle triangle (T0) into an output triangle (T2); applying the inverse affine transform to intermediate points of the intermediate rectangle triangle (T0) so as to determine intermediate intensity values corresponding to said intermediate points on the basis of input intensity values of texels; and applying the direct affine transform to the intermediate points so as to determine output intensity values of pixels on the basis of the intermediate intensity values.

Abstract: A well instrumentation system, comprising: a power and data supply; and a plurality of functional units attached to the power and data supply and distributed throughout the well, characterised in that the power and data supply comprises first and second substantially identical cables, and in that each unit comprises a first power supply channel and a first data channel connected to the first cable, a second power supply channel and a second data channel connected to the second cable, and a functional module which draws power from the first power supply channel or the second power channel module, and data from the first data channel or the second data channel. The power and data supply can comprise a surface unit that can be selectably connected to either the first or second cable. The selection of connection of the surface unit to one or other cable is effective to select the corresponding power and data channels in the functional units.

Abstract: An integrated circuit for the processing of digitized signals which are representative of a source image which is defined by image elements which are encoded on M bits and which are arranged in I rows and J columns. The image is processed by means of M sliding windows (W.sub.1 to W.sub.M) which consist of N rows and P columns and which step-wise slide past each image element along I rows, but which have been shifted through one row with respect to one another. Processing is performed by bit serial operators which successively act on the bits of each of the N+N-1 image elements. The signals may be serially applied via Q contact pads, where Q=N+M-1, or in parallel via Q contact pads where Q is the first multiple of M which is equal to or larger than N+M-1, the integrated circuit then also comprising a parallel to serial converter circuit.

Abstract: A pipeline-type serial multiplier having a cellular structure, each cell comprising an adder which operates on 3 one-bit data x, y, c and which determines the result v modulo 2 and the carry c.sub.o of the addition of x, y, and c. Each adder simultaneously determines a data c.sub.1 which is the modulo 2 result of the addition of x, y, c.sub.o. This enables the exact final result of a multiplication of a data A of n bits by a data B of p bits to be obtained in two successive segments: a segment L which is formed by the p bits of lowest digital weight and a segment H which is formed by the n bits of the highest weight. The output rate is F/n, where F is the clock frequency. The multiplier circuits can be cascaded under the control of an external signal. They can also be connected in parallel in order to add the results of two multiplications.

Abstract: Video graphics system which, by means of a graphics cursor, permits the identification of encoded surfaces of images represented on a screen. In order to do this, there are added to the parameters of the encoded surface, for each surface, an identifier which can be read by slices in the course of readings effected on a plurality of successive frames. An identification memory permits the accumulation of all the slices until the complete acquisition of the identifier. This situation is brought to the attention of the user.

Abstract: The present invention consists in a system for exchanging encoded messages between stations, in which each station comprises a connection module (2) connected to a signal bus (LMS) and to a data bus (LMI), the signal and data buses being serial multiplex links synchronized by a general timebase, a time interval comprising consecutive even-numbered and odd-numbered time slots being allocated in each signalling frame to each connection module. In this system for exchanging encoded messages, the signal and data buses are duplicated for security reasons, signalling messages being sent simultaneously on both signal buses and data messages being sent simultaneously on both data buses, messages being received on one bus only.