Mitsubishi

About: Mitsubishi is a company organization based out in Tokyo, Japan. It is known for research contribution in the topics: Signal & Layer (electronics). The organization has 53115 authors who have published 54821 publications receiving 870150 citations. The organization is also known as: Mitsubishi Group of Companies & Mitsubishi Companies.

Video contrast enhancer

Abstract: A video contrast enhancer enhances luminance contrast by dividing each video frame or field into blocks, calculating a mean luminance level for each block, selecting mapping functions on the basis of these mean luminance levels over a series of frames or fields, and mapping the video luminance levels according to the selected mapping functions. Color-saturation contrast is enhanced by modifying the amplitude of the modulated chrominance signal by the histogram equalization method, preferably by making a single linear modification in each period of the chrominance signal, so that color phase is not affected. For video signals with non-picture bands, these enhancements are preferably restricted to the picture area. If a black offset is present, it is preferably removed.

Semiconductor device and its manufacturing method

Abstract: PROBLEM TO BE SOLVED: To secure large capacitor capacitance by forming capacitors of adjacent memory cells in different layers so that the flat regions in which capacitors are formed are overlapped one another. SOLUTION: After removing the resist, an upper-layer insulation film 19 is formed on the entire surface. An upper-layer contact hole 12 is buried, and at the same time a conductive film is formed so that it covers the entire surface. Next, a resist on which patterning is performed is formed. Using the resist as a mask, the conductive film is etched, and an upper-layer storage 14 is formed. After removing the resist, an upper-layer insulation film 21 is formed on the entire surface. Then, an upper-layer cell plate 20 is formed on the entire surface, and lower-layer capacitor 22 and an upper-layer capacitor 23 are formed. Thus, the capacitors of the adjacent memory cells are formed in different layers so that the flat regions in which the storage nodes of the adjacent capacitors are formed are overlapped one another.

A Practical Approach to 3D Scanning in the Presence of Interreflections, Subsurface Scattering and Defocus

Abstract: Global or indirect illumination effects such as interreflections and subsurface scattering severely degrade the performance of structured light-based 3D scanning. In this paper, we analyze the errors in structured light, caused by both long-range (interreflections) and short-range (subsurface scattering) indirect illumination. The errors depend on the frequency of the projected patterns, and the nature of indirect illumination. In particular, we show that long-range effects cause decoding errors for low-frequency patterns, whereas short-range effects affect high-frequency patterns. Based on this analysis, we present a practical 3D scanning system which works in the presence of a broad range of indirect illumination. First, we design binary structured light patterns that are resilient to individual indirect illumination effects using simple logical operations and tools from combinatorial mathematics. Scenes exhibiting multiple phenomena are handled by combining results from a small ensemble of such patterns. This combination also allows detecting any residual errors that are corrected by acquiring a few additional images. Our methods can be readily incorporated into existing scanning systems without significant overhead in terms of capture time or hardware. We show results for several scenes with complex shape and material properties.

Camera and vehicle-surroundings visual-recognition apparatus using the same

Abstract: A camera provided with a housing having a plurality of entrance windows through each of which extraneous light rays are taken in, an image pickup device mounted in this housing, an optical element that is disposed in the housing and is operative to form images obtained from extraneous light rays taken in through the plurality of entrance windows on the imaging plane of the image pickup device, a light Shielding member that is provided in such a way as to be upright on the imaging plane of the image pickup device and to divide the imaging plane of the image pickup device into imaging fields on which images are respectively formed from the extraneous light rays taken in through the plurality of entrance windows, an aperture limitation remember that is placed in a stage preceding the light shielding member and has an aperture to limit the size of an incidence optical path of each of extraneous light rays from which images are formed on the imaging plane of the image pickup device, a diaphragm member that is disposed in the stage preceding the light shielding member in such a manner as to be able to move in a direction perpendicular to an optical axis and is operative to regulate the quantities of incident light of the imaging fields by overlapping with the aperture in the direction of the optical axis, and a drive unit for moving this diaphragm member in a direction perpendicular to the optical axis.