scholarly journals An Angle of Polarization (AoP) Visualization Method for DoFP Polarization Image Sensors Based on Three Dimensional HSI Color Space

Sensors ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1713
Author(s):  
Hui Wang ◽  
Haofeng Hu ◽  
Xiaobo Li ◽  
Zijian Guan ◽  
Wanshan Zhu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Real Time ◽  
Color Space ◽  
Three Dimensional ◽  
Image Sensor ◽  
Image Sensors ◽  
Human Vision ◽  
Visualization Method ◽  
Polarization Image ◽  
Hsi Color Space

A demand for division of focal plane (DoFP) polarization image sensors grows rapidly as nanofabrication technologies become mature. The DoFP sensor can output real time data of polarization information. In this paper, a novel visualization method for angle of polarization (AoP) is proposed for DoFP polarization image sensors. The data characteristics of AoP are analyzed, and strategies for a visualization method are proposed which conforms to the characteristics of AoP data. According to these strategies, we propose a visualization method for AoP data based on three dimensional HSI color space. This method uses intensity and saturation to characterize the magnitude of the angle between the polarization direction and the horizontal direction wherein the hue indicates the deflection direction. It is shown by the numerical simulation that the noise in the AoP image can be suppressed by our visualization method. In addition, the real-world experiment results are consistent with the numerical simulation and verify that the AoP image obtained by our method can suppress the influence of characterization noise, and the image is simple and intuitive, which is advantageous to human vision. The proposed method can be directly used for the commercialized DoFP polarization image sensor to display real-time AoP data.

Integrated real-time polarization image sensor based on UV-NIL and calibration method

2022 ◽  
pp. 1-1
Author(s):  
Chuanlong Guan ◽  
Ran Zhang ◽  
Jinkui Chu ◽  
Ze Liu ◽  
Yuanyi Fan ◽  
...  
Keyword(s):  
Real Time ◽  
Calibration Method ◽  
Image Sensor ◽  
Polarization Image

Thin Film on ASIC (TFA) - A Technology for Advanced Image Sensor Applications

2005 ◽  
Vol 869 ◽  
Author(s):  
Juergen Sterzel ◽  
Frank Blecher
Keyword(s):  
Dark Current ◽  
Crystalline Silicon ◽  
Three Dimensional ◽  
Light Level ◽  
Image Sensor ◽  
Image Sensors ◽  
Current Sensitivity ◽  
Low Light ◽  
Sensor Applications ◽  
Pattern Noise

AbstractThanks to its three-dimensional integration and the use of amorphous as well as crystalline silicon, the TFA technology is suitable for advanced image sensor applications. This paper describes the fundamentals of the properties: sensitivity, dark current, temporal and fixed-pattern noise of these TFA image sensors. It compares the different sensitivity definitions, especially current sensitivity and the charge conversion factor. Further, the dark current sources are pointed out, and their temperature behavior is described. By noise calculations, different pixel input stages are compared with regard to low light level detection.

Location and Distance Measurement of Door Handle in HSI Color Space

2013 ◽  
Vol 850-851 ◽  
pp. 804-808
Author(s):  
Ruo Hong Wu ◽  
Huai Yu Wu ◽  
Rui Zhong
Keyword(s):  
Real Time ◽  
Real World ◽  
Color Space ◽  
Distance Measurement ◽  
Mobile Platform ◽  
Depth Image ◽  
Fixed Position ◽  
Door Opening ◽  
Hsi Color Space

Current approaches for opening door usually focus on the recognition of door handle in a fixed position, but in the process of door opening, a manipulator with a mobile platform is very important under real-world scenarios, which brings significance to the location and distance measurement of a door handle when the mobile platform is moving. In this paper, a method for location of a door handle in HSI color space is presented. The image of the door handle is captured by the kinect for Xbox360, and is processed in HSI color space, resulting in a rectangle frame fitted to the door handle to be displayed in real time. The distance value of the door handle is obtained from the depth image. Experiment results show the efficiency of the proposed method.

scholarly journals Effects of Offset Pixel Aperture Width on the Performances of Monochrome CMOS Image Sensors for Depth Extraction

Sensors ◽  
2019 ◽  
Vol 19 (8) ◽  
pp. 1823 ◽  
Author(s):  
Lee ◽  
Choi ◽  
Kim ◽  
Lee ◽  
Lee ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Image Sensor ◽  
Image Sensors ◽  
Depth Information ◽  
Cmos Image Sensors ◽  
Depth Extraction ◽  
Pixel Array ◽  
Test Elements ◽  
Aperture Width ◽  
External Light Source

This paper presents the effects of offset pixel aperture width on the performance of monochrome (MONO) CMOS image sensors (CISs) for a three-dimensional image sensor. Using a technique to integrate the offset pixel aperture (OPA) inside each pixel, the depth information can be acquired using a disparity from OPA patterns. The OPA is classified into two pattern types: Left-offset pixel aperture (LOPA) and right-offset pixel aperture (ROPA). These OPAs are divided into odd and even rows and integrated in a pixel array. To analyze the correlation between the OPA width and the sensor characteristics, experiments were conducted by configuring the test elements group (TEG) regions. The OPA width of the TEG region for the measurement varied in the range of 0.3–0.5 μm. As the aperture width decreased, the disparity of the image increased, while the sensitivity decreased. It is possible to acquire depth information by the disparity obtained from the proposed MONO CIS using the OPA technique without an external light source. Therefore, the proposed MONO CIS with OPA could easily be applied to miniaturized devices. The proposed MONO CIS was designed and manufactured using the 0.11 μm CIS process.

Evaluation of the mitral valve by transthoracic real-time three-dimensional echocardiography

2010 ◽  
Vol 151 (21) ◽  
pp. 854-863 ◽  
Author(s):  
Attila Nemes ◽  
Marcel L. Geleijnse ◽  
Osama I. I. Soliman ◽  
Wim B. Vletter ◽  
Jackie S. McGhie ◽  
...  
Keyword(s):  
Mitral Valve ◽  
Real Time ◽  
Three Dimensional ◽  
Dimensional Echocardiography ◽  
Three Dimensional Echocardiography

Jelenleg az echokardiográfia a legszéleskörűbben alkalmazott rutin noninvazív diagnosztikus eljárás, amelynek segítségével a mitralis billentyű morfológiája és funkciója jellemezhető. Ennek az összefoglaló jellegű közleménynek a célja az egyik legújabb echokardiográfiás fejlesztés, a transthoracalis real-time háromdimenziós echokardiográfia szerepének bemutatása a mitralis billentyű vizsgálatában.

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