Mitsubishi Electric Research Laboratories, Inc.

Mitsubishi Electric Research Labs.

Other

Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Ronald N Perry

Sarah F Frisken

Thouis R Jones

Jackson W J Pope

Alan Sullivan

Elena Jakubiak

Eric Chan

Anthony Vetro

Shantanu Rane

Larry D Seiler

Richard C Waters

Sarah F F Gibson

Robert M Kotredes

Hedayat Harsini

Elena J Jakubiak

A mat for removing debris and sanitizing the shoes of a person comprises a base that has a bottom side adapted for laying on a floor surface, a top side, two side edges, a front edge, and a rear edge. The top side of the base has a pair of shoe cleaning spaces that may contain recesses therein that each defines a recess side edge. A sanitizing circuit includes a power source, one or more UV sanitizing lamps each disposed for illuminating the person's shoes within one of the shoe recesses, and a switch for applying power to the UV sanitizing lamps. As such, when the person stands with his shoes in the shoe recesses and activates the switch, the UV sanitizing lamps activate to sanitize the person's shoes, and particularly the bottom sole of the shoes and the sides of the shoes.

Shoe sanitizing mat

A method for labeling a segment of a two-dimensional input path defined according to a nonzero winding rule as either interior or exterior is described. A winding number is initialized. A scan line that intersects the segment is identified. For each contour of the input path, winding values are accumulated into the winding number for any segments of the contour that cross the identified scan line, where the accumulation for coincident segments that cross the identified scan line at a same location as the segment is postponed. These coincident segments are marked and saved in a list. The labeling of the segment as either interior or exterior is determined from the list and the winding number.

Method for labeling segments of paths as interior or exterior

A method converts a two-dimensional input path defined according to a nonzero winding rule to an equivalent output path. Degenerate segments and degenerate contours of the input path are removed. Intersections of the input path are determined. Contours of the input path that include intersections are marked. Unmarked interior contours are removed. Intersections are linked. The marked contours are walked to form new contours. Marked contours and degenerate contours are removed. The new contours and the unmarked contours are collected to form the equivalent output path. The equivalent output path can be rendered using either the nonzero winding rule or an even-odd parity rule.

Method for converting paths defined by a nonzero winding rule

A method and system renders a 3D model of a 3D object as an image including image samples. The 3D model is a distance field, and the distance field includes surface cells representing portions of a surface of the 3D object. A set of image samples in the image is determined in an object-order phase for each surface cell. Each surface cell is then processed independent of other surface cells. The processing casts a ray, in an image order phase from each image sample in the set of image samples, through the surface cell to determine a contribution of the surface cell to the image sample, and then the image is rendered.

Method and system for rendering 3D distance fields

A method embeds a message into a document containing a set of glyphs. Individual glyphs in the document, groups of glyphs in the document, or the entire document are represented using a distance field that includes distance values from the shapes of interest. Each symbol of the message is represented as modifications of a subset of the distance values in the distance field. This subset of the distance values in the distance field is modified according to modification to produce a modified glyph in a modified document, wherein the symbol in the message is embedded in the modified glyph.

Method for embedding messages into documents using distance fields

A method converts an outline character to a stylized stroke character by first identifying regions of the outline character, wherein each region is closed and disjoint. For each region, candidate locations for stroke bodies and terminals of the stylized stroke character are determined. The stroke bodies are then initialized and organized into a hierarchical tree stricture, and modified in an order of the hierarchical tree structure. End positions of the modified stroke bodies are then adjusted to match the outline character, and lastly, the terminals are selected for the adjusted stroke bodies.

Method for converting outline characters to stylized stroke characters

A method generates a distance field of an object, where the distance field includes a set of cells and the object includes a set of stylized strokes. Each stylized stroke includes a centerline, a set of profiles, and a set of terminals. A processor is included for performing steps of the method. A first cell of the set of cells enclosing the object is determined. An outside reconstruction method is associated with the first cell. For each stylized stroke, centerline cells of the set of cells are determined, where each centerline cell encloses a portion of the centerline of the stylized stroke. A centerline reconstruction method is associated with each centerline cell. For each terminal of each stylized stroke a terminal distance field is generated, the terminal distance field including a terminal reconstruction method. Reconstructed distances are determined using the reconstruction methods to generate the distance field of the object.

Method for generating a distance field of an object represented by stylized strokes

A method performed on a processor reconstructs a distance field of an object at a sample point, where the object is a swept volume generated by moving a shape along a path. The shape is represented by a shape distance field. The path is represented by a parametric function. Distance data at the sample points is determined, where the distance data characterizes the distance field of the object at the sample point. An optimal set of parameters defining an optimal placement of the shape along the path is determined in a continuous manner. The shape distance field is transformed to the optimal placement to produce a transformed shape distance field. The distance data is determined at the sample point from the transformed shape distance field to reconstruct the distance field at the sample point.

Method for reconstructing a distance field of a swept volume at a sample point

A method aligns a character to a sampling grid of an image, where an outline of the character is specified by input pen commands. Points and contours of the input pen commands are determined. An orientation of each contour is determined. A first directed acyclic graph (DAG) is constructed indicating a hierarchical relationship of related contours. Radicals are determined using the first DAG. Simple segments of the contours are determined and merged independently for each radical. Segment pairs and their hinted coordinates are determined. The segment pairs are sorted and a second DAG is constructed for the sorted segment pairs. Collisions between the segment pairs are resolved using the second DAG. The segments pairs, x-free points, and y-free points are fitted to the sampling grid independently for each radical and a result of the fitting is stored in output pen commands.

Method for improving character outlines using multiple alignment zones

A method aligns a character to a sampling grid of an image. An original uniform width path that traces a skeleton of the character is specified by input pen commands having original coordinates. The width of the original path is rounded to a nearest integer to produce a hinted width. The original path is traversed using the input pen commands to identify segments of the path. The segments are stored in an array. Hinted coordinates are determined for each segment in the array. The array is sorted, and a directed acyclic graph (DAG) is constructed. Collisions between the segments are resolved using the sorted array, the DAG, and the width of the hinted path. The segments are fitted to the sampling grid, and the result is stored in output pen commands, thereby aligning the skeleton of the character to the sampling grid.

Method for improving uniform width character strokes using multiple alignment zones

Provided is a method performed on a processor for simulating the milling of an object by moving a shape along a path intersecting the object. A composite adaptively sampled distance field (ADF) is generated to represent the object, where the composite ADF includes a set of cells. Each cell in the composite ADF includes a set of distance fields and a procedural reconstruction method for reconstructing the object within the cell. The shape is represented by a shape distance field. The path is represented by a parametric function. A swept volume distance field is defined in a continuous manner to represent a swept volume generated by moving the shape along the path according to a swept volume reconstruction method which reconstructs the swept volume distance field at a sample point. The composite ADF is edited to incorporate the swept volume distance field into the composite ADF to simulate the milling.

Method for simulating numerically controlled milling using adaptively sampled distance fields

A method generates a distance field of an object, where the distance field includes a set of cells and the object includes a set of outlines. A processor is included for performing steps of the method. A first cell of the set of cells enclosing the object is determined. An outside reconstruction method is associated with the first cell. A set of boundary cells of the set of cells is determined, where each boundary cell encloses a portion of a particular outline in the set of outlines. A boundary reconstruction method is associated with each boundary cell. A final cell of the set of cells is determined enclosing the object. An inside reconstruction method is associated with the final cell. The outside and boundary reconstruction methods are used to determine combined distances, which are further processed by the inside reconstruction method to generate the distance field of the object.

Method for generating a distance field of an object represented by outlines

A method, apparatus, and system for rendering are disclosed. A rendering request is defined, where the rendering request describes an object to be rendered. A progressive cache is queried to determine a cached element most representing a display image satisfying the rendering request. The cached element is sent to a starting stage of a rendering pipeline for the object, where the starting stage is associated with the cached element. An output of the starting stage is sent to an input of a next stage of the rendering pipeline. A final stage of the rendering pipeline determines the display image satisfying the rendering request.

Method, apparatus, and system for rendering using a progressive cache

A method animates an object as a sequence of frames according to an animation script. The object is represented as a two-dimensional distance field. For each frame in the sequence of frames, a pose of the object is updated according to the animation script. The object is rendered using the updated pose and an antialiasing rendering method.

Method for animating two-dimensional objects

A method is described for modeling interactions between models. A first adaptively sampled distance field having a first spatial hierarchy for a first model is generated, and a second adaptively sampled distance field having a second spatial hierarchy for a second model is generated. During each time step, a potential overlap region is determined using the spatial hierarchies of the first and second adaptively sampled distance fields. When the potential overlap region is non-empty, a third adaptively sampled distance field is generated from the first and second adaptively sampled distance fields using a first interaction procedure and first properties and a fourth adaptively sampled distance field is generated from the first and second adaptively distance fields using a second interaction procedure and second properties to model the interactions between the first and second models.

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Ronald N Perry