Noriyuki Yamashita

New Systems for Video Processing ICs

In improving the playback picture quality of a VCR, working particularly on improving the reduction of the crosstalk of the chroma signal from the neighboring tracks, and the signal to noise ratio, we concentrated on a modified feedback combfilter, in making up the complex combfilter system. Also, we were able to construct a nearly ideal VCO (Voltage Controlled Oscillator) System used in a color-APC (Automatic Phase Control). Its oscillation frequency is quite stable and it has a wide controllable frequency range. In these two systems we used a comparatively large value capacitor that makes it possible to achieve their special characteristics. Making use of the small elements including the large value capacitance found in the fine IC-process, we were able to fit these systems onto several ICs.

CLAIRVOYANCE: A Fast And Robust Precision Mosaicing System for Gigapixel Images

In this paper, we present CLAIRVOYANCE: a fully automatic photomosaicing system for building ultra high-resolution composited images from image sequences captured by tailored in-house motorized active pan-tilt digital camera units. Our stand-alone mobile systems built over the past five years are computationally fast, robust to various datasets and deliver unprecedented consumer-level image quality. We describe our simple yet novel lens calibration and radiometric correction procedures based on a fast block matching algorithm. All of our core image stitching components are based on the 2D Fourier phase correlation principle, and are thus easily amenable to hardware LSI implementation. We validate our approach by presenting sharp photomosaics obtained from a few hundreds up to a few thousands data sets of images