This paper introduces a new system of barrier-free information as integration of camera and GPS of mobile phones and map information. The system will help wheel chair users to find restroom and parking lots easily. We apply a new method to obtain high precision images when enlarged or reduced and to make a high-speed processing possible. In addition, we realize two innovative technologies: (1) prismatic markers and (2) display of several details information. By (1), a marker easily distinguished among others, While they were conventionally monochrome. By (2), one can indicate several information of different kind, like restroom and parking lots for example, at the same time on the map. We consider that this new system will contribute as a information navigation system of Musashino city.
We present a new global shutter CMOS imager which has a simple structure with 2 transistors per pixel and no KTC noise. We realized the imager with 5.4 um pixel pitch using 0.35 um technology. The imager shows a possibility of smaller pixel pitch than 2 um using 0.18 um technology.
Two aspects on the output of cameras are studied. One is the characteristic of the camera system "XTF" proposed for Extended Color Space Standards, xvYCC. The other is the blur in moving areas. Since it is caused by both taking systems and displays, it should be studied by both these professionals, though it is now mainly studied by display professionals.
A 1.25-inch optical format, 8.9M-pixel CMOS image sensor that employs a 4T pinned photodiode (P-PD) pixel and 14bit column ADCs is reported. A 14bit or 12bit digital video signal is streamed out via 16-lane low-voltage, low-power differential serial output ports in 50fps or 60fps operation, respectively. Temporal noise floor of 2.8e^-rms and linear full-well of 27.8ke^- were obtained at 60 fps. Row temporal noise and column FPN are as small as 0.31e^-rms and 0.36 e^-rms, respectively.
We developed a prototype single-chip color HDTV camera for broadcasting. This camera used a 1.25-inch 8.9M-pixel CMOS image sensor, and the camera characteristics were; resolution was more than 35% on MTF (45% on square wave response) at 800 TV-lines, the sensitivity was F-stop 11 at 2000 lux with 400% dynamic range and the SNR was 60 dB. In this paper we measured the color reproduction characteristics of the camera. The color difference from conventional 3CCD broadcasting camera depended on the light source and was about 9.3 to 14.5 of the delta-E on a CIELAB color space. Our simulation showed that it was corrected to about 1.8 to 4.5 by the linear-matrix color correction.
Demand for wide dynamic range image sensors are getting stronger, and various techniques have been developed. This talk covers overview of major achievements reported, classifying into variety of conversion functions of photo current, variation on readout timing, and variation on in-pixel capacitance.