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Transport of intensity phase imaging by intensity spectrum fitting of exponentially spaced defocus planes

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Transport of intensity phase imaging by intensity spectrum fitting of exponentially spaced defocus planes
นักวิจัย : Jingshan, Zhong , Claus, Rene A. , Dauwels, Justin , Tian, Lei , Waller, Laura
คำค้น : DRNTU::Engineering
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2557
อ้างอิง : Jingshan, Z., Claus, R. A., Dauwels, J., Tian, L., & Waller, L. (2014). Transport of Intensity phase imaging by intensity spectrum fitting of exponentially spaced defocus planes. Optics Express, 22(9), 10661-10674. , 1094-4087 , http://hdl.handle.net/10220/19575 , http://dx.doi.org/10.1364/OE.22.010661
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Optics express
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

We propose an alternative method for solving the Transport of Intensity equation (TIE) from a stack of through–focus intensity images taken by a microscope or lensless imager. Our method enables quantitative phase and amplitude imaging with improved accuracy and reduced data capture, while also being computationally efficient and robust to noise. We use prior knowledge of how intensity varies with propagation in the spatial frequency domain in order to constrain a fitting algorithm [Gaussian process (GP) regression] for estimating the axial intensity derivative. Solving the problem in the frequency domain inspires an efficient measurement scheme which captures images at exponentially spaced focal steps, significantly reducing the number of images required. Low–frequency artifacts that plague traditional TIE methods can be suppressed without an excessive number of captured images. We validate our technique experimentally by recovering the phase of human cheek cells in a brightfield microscope.

บรรณานุกรม :
Jingshan, Zhong , Claus, Rene A. , Dauwels, Justin , Tian, Lei , Waller, Laura . (2557). Transport of intensity phase imaging by intensity spectrum fitting of exponentially spaced defocus planes.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Jingshan, Zhong , Claus, Rene A. , Dauwels, Justin , Tian, Lei , Waller, Laura . 2557. "Transport of intensity phase imaging by intensity spectrum fitting of exponentially spaced defocus planes".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Jingshan, Zhong , Claus, Rene A. , Dauwels, Justin , Tian, Lei , Waller, Laura . "Transport of intensity phase imaging by intensity spectrum fitting of exponentially spaced defocus planes."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2557. Print.
Jingshan, Zhong , Claus, Rene A. , Dauwels, Justin , Tian, Lei , Waller, Laura . Transport of intensity phase imaging by intensity spectrum fitting of exponentially spaced defocus planes. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2557.