Spatial frequency domain imaging (SFDI) is an emerging diffuse optical technology that recently gains significant attention2,23,27,28,29. It can quantify optical properties of turbid media in a label-free, non-contact manner, and its camera-based detection scheme makes it intrinsically wide-field...
Subsequently, the spatial frequency domain imaging technique is used to obtain the sub-surface images of soybean seeds in a forward manner, and the optical coefficients such as the reduced scattering coefficient μ′s and absorption coefficient μa of soybean seeds are inverted. Finally, RL-MLR, ...
(1974) suggested that the imaging system MTF be weighted by the spatial frequency power spectrum of the image to be displayed to determine the effective MTFA. While not evaluated in the context of the MTFA metric, this general concept has been incorporated by others in predicting performance. ...
An imaging system's object field to image field transformation operation is usually described in the (spatial) frequency domain using the system's transfer function. The limitation of this description is that the imaging system must be space-invariant. In contrast, an object field to image field...
c The Spatial Frequency Domain Every audiophile is familiar with the concept of the temporal frequency response of an audio reproduction system. The notion of the spatial frequency response of an imaging system dates at least as far back as Abbe's (1873) theory of the microscope. However, this...
A Ti:Al2O3 chirped-pulse amplification system is used to simultaneously image and machine. By combining simultaneous spatial and temporal focusing (SSTF) with spatial frequency modulation for imaging (SPIFI), we are able to decouple the imaging and cutting beams to attain a resolution and a fiel...
(36 total pixels) to provide a wide latitude of possible resolutions within the frequency domain. As the slider is moved to the right (reducing the number of pixels in the digital image), specimen details are sampled at increasingly lower spatial frequencies and image detail is lost. At the ...
To this end, we have developed a new quantitative imaging device that can be used to investigate parameters related to optimizing dosimetry.MethodsWe present a spatial frequency domain imaging (SFDI) based device designed to: (1) determine the optical properties at the therapeutic wavelength, which...
Spatial frequency domain imaging (SFDI): a technology overview and validation of an LED-based clinic friendly device We present an overview of Spatial Frequency Domain Imaging (SFDI), a non-contact near infrared (NIR) imaging approach that enables rapid, quantitative dete... DJ Cuccia - Procee...
spatial frequency compressionspatial frequency shiftssuperresolution microscopyThe diffraction limit substantially impedes the resolution of the conventional optical microscope. Under traditional illumination, the high﹕patial‐frequency light corresponding to the subwavelength information of objects is located in ...