666 results about "Region growing" patented technology

A method of making a semiconductor device having a predetermined epitaxial region, such as an active region, with reduced defect density includes the steps of: (a) forming a dielectric cladding region on a major surface of a single crystal body of a first material; (b) forming a first opening that extends to a first depth into the cladding region; (c) forming a smaller second opening, within the first opening, that extends to a second depth greater than the first depth and that exposes an underlying portion of the major surface of the single crystal body; (d) epitaxially growing regions of a second semiconductor material in each of the openings and on the top of the cladding region; (e) controlling the dimensions of the second opening so that defects are confined to the epitaxial regions grown within the second opening and on top of the cladding region, a first predetermined region being located within the first opening and being essentially free of defects; (f) planarizing the top of the device to remove all epitaxial regions that extend above the top of the cladding layer, thereby making the top of the first predetermined region grown in the second opening essentially flush with the top of the cladding region; and (g) performing additional steps to complete the fabrication of the device. Also described are unique devices, such as photodetectors and MOSFETs, fabricated by this method, as well as unique contacting configurations that enhance their performance.

A method and system of reading images. The method includes decimating an image and normalizing the decimated image. Then, rebinning grayscale pixel data associated with the decimated image and reassigning a selected range of grayscales representing a region of interest of the remapped grayscale pixel data to one while zeroing others. The method also includes labeling the connected pixels associated with the range of grayscales representing the region of interest and then extending the connected pixels through region growing using a preselected offset value. Lastly, the method includes filtering segmented regions of the connected pixels to eliminate certain candidates. The system is designed to implement the steps of the enumerated method.

Disclosed is a systematic way of automatically segmenting lung regions. To increase the efficiency of a lung segmentation technique, a region-based technique, such as region growing, is performed by a computer on a middle slice of the CT volume. A contour-based technique is then used for a plurality of non-middle slices of the CT volume. This allows the implementation to be multithreaded and results in an improvement in the segmentation algorithm's efficiency.

Systems and methods are described for phase-sensitive magnetic resonance imaging using an efficient and robust phase correction algorithm. A method includes obtaining a plurality of MRI data signals, such as two-point Dixon data, one-point Dixon data, or inversion recovery prepared data. The method further includes implementing a phase-correction algorithm, that may use phase gradients between the neighboring pixels of an image. At each step of the region growing, the method uses both the amplitude and phase of pixels surrounding a seed pixel to determine the correct orientation of the signal for the seed pixel. The method also includes using correlative information between images from different coils to ensure coil-to-coil consistency, and using correlative information between two neighboring slices to ensure slice-to-slice consistency. A system includes a MRI scanner to obtain the data signals, a controller to reconstruct the images from the data signals and implement the phase-correction algorithm, and an output device to display phase sensitive MR images such as fat-only images and / or water-only images.

We propose local watershed operators for the segmentation of structures, such as medical structures, from an image. A watershed transform is a technique for partitioning an image into many regions while substantially retaining edge information. The proposed watershed operators are a computationally efficient local implementation of watersheds, which can be used as an operator in other segmentation techniques, such as seeded region growing, region competition and markers-based watershed segmentation.