Abstract: A differentiation system for differentiating cells includes an input device configured to receive holographic image data of a microscopic particle in suspension, holographic image data processing logic for converting the holographic image data to the frequency domain by performing a Fourier transform of the holographic image data, and a recognizer configured to determine characterization features of the holographic image data of the microscopic particle in the frequency domain for characterization of the microscopic particle, the characterization features comprising rotationally invariant features.

Abstract: The present disclosure relates to a method for computing a holographic interference pattern for a holographic plane including pixels of an illuminated three-dimensional, 3D, scene having object points representing one or more 3D objects. The method involves: determining, for a respective object point, a total light component contributed by one or more light sources in the 3D scene; and calculating, for a respective pixel, a complex-valued amplitude based on the total light component of non-occluded object points within a viewing cone of the pixel, thereby deriving the holographic interference pattern. The present disclosure further relates to a computer program product implementing the method, a computer-readable storage medium comprising the computer program product and a data processing system for carrying out the method.

Abstract: Example embodiments relate to methods for disseminating scaling information and applications thereof in very large scale integration (VLSI) implementations of fixed-point fast Fourier transforms (FFTs). One embodiment includes a method for disseminating scaling information in a system. The system includes a linear decomposable transformation process and an inverse process of the linear decomposable transformation process. The inverse process of the linear decomposable transformation process is defined, in time or space, as an inverse linear decomposable transformation process. The linear decomposable transformation process is separated from the inverse linear decomposable transformation process. The linear decomposable transformation process or the inverse linear decomposable transformation process is able to be performed first and is defined as a linear decomposable transformation I. The other remaining process is performed subsequently and is defined as a linear decomposable transformation II.

Abstract: The invention pertains to a computer-implemented method for compensating motion for a digital holographic video stream, the method comprising: obtaining (1010) a sequence of frames representing consecutive holographic images of a scenery; obtaining (1020) translation and rotation vectors describing a relative motion of at least one object in said scenery between a pair of frames from among said sequence of frames; and applying (1030) an affine canonical transform to a first frame of said pair of frames so as to obtain a predicted frame, said affine canonical transform representing said translation and rotation vectors. The invention also pertains to a computer program product and to an apparatus for compensating motion for a digital holographic video stream.

Abstract: The invention pertains to a computer-implemented method for compensating motion for a digital holographic video stream, the method comprising: obtaining (1010) a sequence of frames representing consecutive holographic images of a scenery; obtaining (1020) translation and rotation vectors describing a relative motion of at least one object in said scenery between a pair of frames from among said sequence of frames; and applying (1030) an affine canonical transform to a first frame of said pair of frames so as to obtain a predicted frame, said affine canonical transform representing said translation and rotation vectors. The invention also pertains to a computer program product and to an apparatus for compensating motion for a digital holographic video stream.

Abstract: A differentiation system for differentiating cells includes an input device configured to receive holographic image data of a microscopic particle in suspension, holographic image data processing logic for converting the holographic image data to the frequency domain by performing a Fourier transform of the holographic image data, and a recognizer configured to determine characterization features of the holographic image data of the microscopic particle in the frequency domain for characterization of the microscopic particle, the characterization features comprising rotationally invariant features.

Abstract: A method for determining a representation of multichannel radio-frequency, RF, signals acquired from a physical environment, involves a transmitter for emitting ultrasound excitation pressure waves, a propagation medium containing non-uniformities reflecting the pressure waves, and a receiver comprising one or more elements for recording the multichannel RF signals from the reflected pressure waves. The method comprises determining a set of basis functions for representing the received reflected signals by deriving a model, modelling the propagation medium bounded by said transmitter and the receiver, modelling individual responses of the non-uniformities to the excitation pressure waves, deriving the set of basis functions from said individual responses by simulating response to excitation of the non-uniformities in the propagation medium, and determining a representation of the recorded multichannel RF signals using the set of basis functions obtained with the model.

Abstract: A bit stream representing n-dimensional data structures may be encoded and decoded. A part of the data can be mappable within predefined similarity criteria to a part of the data of another data structure. The similarity criteria may include, a spatial or temporal shift of the data. The data structures are typically sequential video frames such as is used in motion estimation and/or compensation of moving pictures, and a part of the data structure may be a block of data within a frame. The shift may be any suitable shift such as linear translation, rotation, or change of size. Digital filtering may be applied to a reference or other frame of data to generate subbands of a set of subbands of an overcomplete representation of the frame by calculations performed at single rate. The digital filtering may be implemented in a separate filter module or in software.

Abstract: A method and apparatus is described for coding motion information in video processing of a stream of image frames and for avoiding the drift problem. The method or apparatus is for providing motion vectors of at least one image frame, and for coding the motion vectors to generate a quality-scalable representation of the motion vectors. The quality-scalable representation of motion vectors can comprise a set of base-layer motion vectors and a set of one or more enhancement-layers of motion vectors. The method of decoding and a decoder for such coded motion vectors as part of receiving and processing a bit stream at a receiver includes the base-layer of motion vectors being losslessly decoded, while the one or more enhancement layers of motion vectors are progressively received and decoded, optionally including progressive refinement of the motion vectors, eventually up to their lossless reconstruction.

Abstract: Images are subband transformed to create a plurality of subband images. Each subband image includes a plurality of pixels. Each pixel is represented by a plurality of bits with each bit associated to a certain quantization level. Encoding of an image requires scanning essentially all the bits of essentially all the pixels of the image. While scanning in a particular order, one can exploit dependencies within groups of bits consecutively scanned for encoding purposes. Thus, bits of groups can be encoded together. In a subband and transformed image, the scanning order or scanning curve is defined by indicating in which order the system traverses the several subbands and the several quantization levels. One method is characterized in that the set of scanned bits which will be encoded together, and which thus form a group, bits of at least two different sub-images and at least two different quantization levels are recognized.

Abstract: Method and apparatus for encoding and decoding a bit stream comprising a representation of a sequence of n-dimensional data structures or matrices, in which n is typically 2. A part of the data of one data structure of the sequence can be mappable within predefined similarity criteria to a part of the data of a another data structure of the sequence. The similarity criteria may include, for instance, a spatial or temporal shift of the data within an image of a video signal such as is used in motion estimation and/or compensation of moving pictures, e.g., video images as well as coders and encoders for coding such a bitstream, e.g., a video signal for use in motion compensation and/or estimation. The data structures are typically video frames and a part of the data structure may be a block of data within a frame.