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We have developed a framework for analyzing images, called Shells and Spheres, based on a set of spheres with adjustable radii, with exactly one sphere centered at each image pixel. This set of spheres, known as a sphere map, is considered optimized when each sphere reaches, but does not cross, the nearest boundary. Calculations denoted as Variable-Scale(More)
We present a novel and relatively simple method for magnifying forces perceived by an operator using a tool. A sensor measures the force between the tip of a tool and its handle held by the operator's fingers. These measurements are used to create a proportionally greater force between the handle and a brace attached to the operator's hand, providing an(More)
We present a novel device mounted on the fingertip for acquiring and transmitting visual information through haptic channels. In contrast to previous systems in which the user interrogates an intermediate representation of visual information, such as a tactile display representing a camera generated image, our device uses a fingertip-mounted camera and(More)
This paper presents results generated with a new evolutionary robotics (ER) simulation environment and its complementary real mobile robot colony research test-bed. Neural controllers producing mobile robot maze searching and exploration behaviors using binary tactile sensors as inputs were evolved in a simulated environment and subsequently transferred to(More)
Real Time Tomographic Reflection (RTTR) permits in situ visualization of tomographic images, enabling natural hand-eye coordination to guide invasive procedures. The method as originally developed uses a half-silvered mirror to merge the visual outer surface of the patient with a simultaneous scan of the patient's interior. A viewpoint-independent virtual(More)
We have developed a novel framework for medical image analysis , known as Shells and Spheres. This framework utilizes spherical operators of variable radius centered at each image pixel and sized to reach, but not cross, the nearest object boundary. Statistical population tests are performed on adjacent spheres to compare image regions across boundaries.(More)
– We present a new method of sensing the 3D visual environment and controlling objects within it. The human hand is well suited to interrogate and manipulate objects by physical contact; however, the hand is limited to surfaces within its reach. Extending the hand's innate ability, we mount miniature cameras on individual fingertips, permitting rapid(More)
The amygdala is critical for processing emotional information and plays an important role in late-life depression (LLD). Volumetric studies of the amygdala have been inconclusive with reports of increased , decreased, and no volume changes. This study investigates amygdala shape morphemetry to test the hypothesis that if structural changes are specific to(More)