Accurate assessment of cutaneous tissue oxygenation and vascular function is important for appropriate detection, staging, and treatment of many health disorders such as chronic wounds. We report the development of a dual-mode imaging system for non-invasive and non-contact imaging of cutaneous tissue oxygenation and vascular function. The imaging system integrated an infrared camera, a CCD cam...

Based on the principle of CCD vertical target measurement system, this article researched the factors of the CCD camera that affects the target detection performance , including CCD sensitivity and exposure, background illumination and target illumination, CCD distinguish ability, contrast between background and objectives and gave the relevant calculation methods. Through theoretical analysis,...

The most common method used for authentication is Textual passwords. But Textual passwords are in risk to eves dropping, dictionary attacks, social engineering and shoulder surfing. Biometric passwords are introduced as alternative techniques to textual passwords. Biometrics is used for human recognition which consists of authentication, verification and recognition. A CCD camera will capture t...

C omplementary-metal-oxide-semiconductor (CMOS), active-pixel-sensor (APS), digital camera-on-a-chip technology has progressed rapidly in the six or so years since it was invented by scientists at the NASA Jet Propulsion Laboratory (Pasadena, CA; see Fig. 1). While performing the same general image-capture function as its predecessor, the charge-coupled device (CCD), this highly integrated "sys...

-The factors influencing imaging quality of industrial digital radiographic imaging system are analyzed detailedly. This imaging system is a new type industrial digital radiographic imaging system developed by author, The structure of ray conversion screen and its non-uniformity, the discordance analysis of scientific grade CCD and vignetting effect of the optical system are introduced. The cor...

Focusing CCD-based telescopes is one of the drudgeries astronomers constantly face. With the recent advent of relatively low cost, motorized position-feedback focusing hardware, comes an opportunity to fully automate the focusing operation. This paper presents a new method and software for automatically focusing CCD based telescope systems. It is highly suitable for unattended all-night robotic...

Creating virtual environment models often requires geometric data from range sensors as well as photometric data from CCD cameras. The model must be geometrically correct, visually realistic, and small enough in size to allow real-time rendering. We present an approach based on 3D range sensor data, multiple CCD cameras, and a colour high-resolution digital still camera. The multiple CCD camera...

CCD cameras have numerous advantages over photographic film for detecting electrons; however the point spread function of these cameras has not been sufficient for single particle data collection to subnanometer resolution with 300kV microscopes. We have adopted spectral signal to noise ratio (SNR) as a parameter for assessing detector quality for single particle imaging. The robustness of this...