Abstract:
Compact descriptors of digital images are produced by detecting interest points representative of the digital images and selecting out of the interest points key points for producing e.g. local and global compact descriptors of the images. The digital images are decomposed into blocks by computing an energy (variance) for each said block and then subjecting the blocks to culling by rejecting those blocks having an energy failing to pass an energy threshold. The interest points are detected only in the blocks resulting from culling, and the key points for producing the compact descriptors are selected out of the interest points thus detected, possibly by using different selection thresholds for local and global compact descriptors, respectively. The number of key points for producing the compact descriptors may be varied e.g. by adaptively varying the number of the interest points detected in the blocks resulting from culling.
Abstract:
A method of predicting the orbit of a satellite of a satellite positioning system, including: associating first and second types of satellites with first and second models of celestial mechanics forces, respectively; storing first ephemerides data of a satellite, associated to first time intervals and second ephemerides data associated to second time intervals. Further, the method comprises: calculating reference satellite positions based on the first ephemerides data; estimating first and second satellite positions in the first time intervals by using the second ephemerides data and the first and second forces models, respectively; determining first and second estimate errors by comparing the reference positions with the first and second positions, respectively; and detecting the type of satellite between the first and second types by an analysis of the first and second errors.
Abstract:
An embodiment is directed to extended test coverage of complex multi-clock-domain integrated circuits without forgoing a structured and repeatable standard approach, thus avoiding custom solutions and freeing the designer to implement his RTL code, respecting only generally few mandatory rules identified by the DFT engineer. Such an embodiment is achieved by introducing in the test circuit an embodiment of an additional functional logic circuit block, named “inter-domain on chip clock controller” (icOCC), interfaced with every suitably adapted clock-gating circuit (OCC), of the different clock domains. The icOCC actuates synchronization among the different OCCs that source the test clock signals coming from an external ATE or ATPG tool and from internal at-speed test clock generators to the respective circuitries of the distinct clock domains. Scan structures like the OCCs, scan chain, etc., may be instantiated at gate pre-scan level, with low impact onto the functional RTL code written by the designer.
Abstract:
A depth map is generated from at least a first and a second image. Generally, a plurality of reference pixels are selected in the first image and associated with respective pixels in the second image. Next, the disparity between each reference pixel and the respective pixel in said second image is determined, and for each reference pixel a depth value as a function of the respective disparity. In particular, each reference pixel is associated with a respective pixel in the second image via a matching and a filtering operation. The matching operation selects for each reference pixel a plurality of candidate pixels in the second image and associates with each candidate pixel a respective cost function value and a respective disparity value.
Abstract:
A multi-level shifter includes a first branch having first and second transistors coupled between a higher voltage terminal and a lower voltage terminal. The multi-level shifter comprises a second branch, in parallel with the first branch, having: a third transistor, coupled between said higher voltage reference terminal and an output node, a fourth switching transistor coupled between said output node and said lower voltage terminal. Said third and fourth transistors have respective control terminals controlled by drain terminals of said first and second transistors, respectively. The shifter includes a bidirectional battery coupled between said drain terminals of said first and second transistors to supply first and second voltages having the same magnitude and different polarities. Said fourth transistor is controlled according to the first voltage when said first transistor is turned on and said third transistor is controlled according to the second voltage when said second transistor is turned on.
Abstract:
A microelectromechanical-acoustic-transducer assembly has: a first die integrating a MEMS sensing structure having a membrane, which has a first surface in fluid communication with a front chamber and a second surface, opposite to the first surface, in fluid communication with a back chamber of the microelectromechanical acoustic transducer, is able to undergo deformation as a function of incident acoustic-pressure waves, and faces a rigid electrode so as to form a variable-capacitance capacitor; a second die, integrating an electronic reading circuit operatively coupled to the MEMS sensing structure and supplying an electrical output signal as a function of the capacitive variation; and a package, housing the first die and the second die and having a base substrate with external electrical contacts. The first and second dice are stacked in the package and directly connected together mechanically and electrically; the package delimits at least one of the front and back chambers.
Abstract:
A z-axis micro-electro-mechanical detection structure, having a substrate defining a plane and a suspended mass carried by two anchorage elements. The suspended mass includes a translating mass, suspended over the substrate, mobile in a transverse direction to the plane and arranged between the anchorage elements and two tilting masses, each of which is supported by the anchorage elements through respective elastic anchorage elements so as to be able to rotate with respect to respective oscillation axes. The oscillation axes are parallel to each other to enable a translation movement of the translating mass. Fixed electrodes face at a distance the tilting masses or the translating mass so as to be able to detect displacement of the suspended mass as a result of external forces. Elastic supporting elements are arranged between the translating mass and the tilting masses to enable relative rotation between the translating mass and the tilting masses.
Abstract:
A wafer-level package for a MEMS integrated device, envisages: a first body integrating a micromechanical structure; a second body having an active region integrating an electronic circuit, coupled to the micromechanical structure; and a third body defining a covering structure for the first body. The second body defines a base portion of the package and has an inner surface coupled to which is the first body, and an outer surface provided on which are electrical contacts towards the electronic circuit; a routing layer has an inner surface set in contact with the outer surface of the second body and an outer surface that carries electrical contact elements towards the external environment. The third body defines a covering portion for covering the package and is directly coupled to the second body for closing a housing space for the first body.
Abstract:
An embodiment of an integrated electronic device having a body, made at least partially of semiconductor material and having a top surface, a bottom surface, and a side surface, and a first antenna, which is integrated in the body and enables magnetic or electromagnetic coupling of the integrated electronic device with a further antenna. The integrated electronic device moreover has a coupling region made of magnetic material, which provides, in use, a communication channel between the first antenna and the further antenna.
Abstract:
An electronic system to discharge a transformer in case of a failure during a charging phase of the transformer. The system includes the transformer having a primary winding with a first terminal connected to a battery voltage and with a second terminal for generating a primary voltage signal, includes a switch serially connected to the primary winding and having a control terminal carrying a control voltage signal for opening or closing the switch and includes an electronic circuit. The electronic circuit further includes a current generator and a voltage clamping.