Compression is one of the most demanding of the processing steps. Still, image compression is achieved by removing spatial redundancy, while in video devices, temporal redundancy can be used to further improve the compression performance. Various image compression algorithms and coding schemes have been proposed, such as predictive coding, Discrete Cosine Transform (DCT) based compression algor...

Abstract The CMOS image sensor having VIPS(Vertically Integrated Photodiode Structure) was fabricated for the first time. By adding the high energy(~3MeV) ion implantation to the conventional CIS(CMOS Image Sensor) process, it was verified that the deep photo diode was successfully formed under the normal photodiode on a pixel. And it was observed that this image sensor can detect the visual im...

In this paper a new rail-to-rail pixel readout architecture is proposed to enhance the performance of CMOS image sensor for both low voltage and low power applications. Due to this new readout circuit, the enough input voltage swing under a low supply voltage is achieved and guaranteed for correct successive signal processing. As a consequence, the ability of working under a lower voltage using...

*1: CDS: Correlated double sampling CMOS sensors are now widely used in cellular phones and other mobile devices, and as a result, sales of these devices have been increasing rapidly. Furthermore, demand for CMOS sensors has been increasing in fields that require high-speed imaging functions, such as digital singlelens reflex cameras. While CMOS sensor advantages over CCD include lower power co...

In this paper, a new CMOS active pixel sensor (APS) of 128×128 resolution is proposed for high quantum efficiency. The presented CMOS image sensor can operate at the power supply of 3.3V, and use both a new pixel-shared structure and split-path readout direction. This new method has the advantage that the number of transistors in each pixel is reduced to increase the fill factor by enlarging th...

In this paper, image noise characterization based on digital camera RAW data is studied and three different imaging technologies are compared. The three digital cameras used are Canon EOS D30 with CMOS sensor, Nikon D70 with CCD sensor and Sigma SD10 with Foveon X3 Pro 10M CMOS sensor. Due to different imaging sensor constructions, these cameras have rather different noise characteristics. The ...

A 128 × 128 pixel functional image sensor was implemented. The sensor was able to capture images at 1,000 frame/s and extract the sizes and positions of 10 objects/frame when clocked at 8 MHz. The size of each pixel was 18 μm × 18 μm and the fill factor was 28%. The chip, 3.24 mm × 3.48 mm in size, was implemented with a 0.35 μm CMOS sensor process; the power consumption was 29.7 mW at 8 MHz. k...