We are particularly interested in developing nextgeneration imaging systems that combine advances in hardware and software, although many of us also focus on purely algorithmic work and applied mathematics that have practical applications in imaging. Analysis of folded imaging system and multiple apertures. Inferring internal scattering parameters for general, heterogeneous materials, remains a challenging inverse problem. Computational imaging has become an important eld, as a merger of both algorithms and physical experiments. Computational imaging 6 massachusetts institute of technology. Imani1, hayrettin odabasi1, jonah gollub1,guylipworth1, alec rose2, and david r. Medical image processing overview hongmei zhu, university of calgary biomedical image processing has experienced dramatic expansion, and has been an interdisciplinary research field attracting expertise from applied mathematics, computer sciences, engineering, statistics, physics, biology and medicine. However, before we do that, its important to consider how the knowledge that well be using computational imaging to analyse data should affect experimental planning. Dynamic metamaterial aperture for microwave imaging.
Dynamic metasurface apertures for synthetic aperture radar. Use of coded apertures in gammaimaging techniques springerlink. We introduce the concept of a metamaterial aperture, in which an underlying reference mode interacts with a designed metamaterial surface to produce a series of complex field patterns. Oct 23, 20 simulations of 2d metamaterial apertures for coherent computational imaging abstract. Coded aperture projection acm tog 2010 max grosse, gordon wetzstein, anselm grundhoefer, oliver bimber coding a projectors aperture plane with adaptive patterns together with inverse filtering allow the depthoffield of projected imagery to be increased.
Security screening via computational imaging using. In this work we provide the foundation for computational imaging with metamaterial apertures based on frequency diversity, and establish that for resonators with physically relevant qfactors, there are potentially enough distinct measurements of a typical scene within a reasonable bandwidth to achieve diffractionlimited reconstructions of. These techniques increase the amount of light reaching the sensor via multiplexing and then undo the deleterious effects of multiplexing by appropriate. This designer aperture allows image compression to be performed on the physical hardware layer rather than in the postprocessing stage, thus averting the detector, storage, and transmission costs associated with full.
Metamaterial apertures for computational imaging request pdf. A framework for the analysis of computational imaging systems with practical applications kaushik mitra, member, ieee, oliver s. Metamaterial fibres for subdiffraction imaging and. Over the last decade, a number of computational imaging ci systems have been proposed for tasks such as motion deblurring, defocus deblurring and multispectral imaging. Fresnel zone plate imaging in radiology and nuclear medicine. By leveraging metamaterials and compressive imaging, a lowprofile aperture capable of. Oecd conference center, paris, france 810 februa ry 2012 andrew wood 1, nicholas bustin 1 and gonzalo muyo 2. We investigate the imaging capabilities of a onedimensional, dynamic, metamaterial aperture that operates at the lower part of kband microwave frequencies 17. Metamaterial apertures for computational imaging john hunt,1,4 tom driscoll,1,2,4 alex mrozack,3 guy lipworth,1,4 matthew reynolds,4 david brady,4 david r.
Computational optical imaging optique numerique active. Optical design and characterization of an advanced. It starts with generation of an image, and in this section, we will look at some of the ways to deal with images produced by microscopes. An evaluation of computational imaging techniques for heterogeneous inverse scattering ioannis gkioulekas 1, anat levin2, todd zickler 1harvard university 2weizmann institute of science abstract. Advanced computer graphics spring 20 cs 283, lecture 24 computational imaging and photography. As we say at the begining, coded aperture imaging is a general method not limited to nuclear medicine. Pdf large metasurface aperture for millimeter wave.
Although many advanced imaging functions are facilitated by providing external access to both aperture and image planes in cis1 and cis2, our major contribution is the external accessible apertures, for the way the intermediate image planes are formed is similar to previous work. Dynamic metamaterial aperture for microwave imaging request pdf. Hamilton, christy fernandezcull, ramesh raskar, boxin shi, christopher barsi, and hang zhao. Sparse recovery and psf engineering bob plemmons wake forest university emeritus imaging, vision and learning based on optimization and pdes bergen norway 2016. Each part of the system may truncate the light, and therefore the multiple apertures effect must be taken into consideration for the evaluation of the imaging quality. Analysis of folded imaging system with multiple apertures.
Metamaterial apertures for coherent computational imaging. Ivo ihrke winter 20 computational optical imaging optique numerique active light 3dwinter 20 ivo ihrke with slides by thorsten thormaehlen. An evaluation of computational imaging techniques for. Computation inherent in image formation 1 computing is getting faster and cheaper precision physical apparatus is not 2 cant refract or re. Computational imaging coded aperture projection acm tog 2010. A framework for the analysis of computational imaging. View computational imaging research papers on academia. Computational imaging advanced computer graphics spring 20. Resolution of the frequency diverse metamaterial aperture imager. The aperture consists of an array of complementary, resonant metamaterial elements patterned into the upper conductor of a microstrip line. A framework for the analysis of computational imaging systems. Metamaterial apertures for computational imaging pubag. Medical image processing overview fields institute. Compressive imaging spectrometers using coded apertures.
Lipworth g, mrozack a, hunt j, marks dl, driscoll t, brady d, smith dr. Aperture access and manipulation for computational imaging. Inverse synthetic aperture radar imaging with matlab algorithms top results of your surfing inverse synthetic aperture radar imaging with matlab algorithms start download portable document format pdf and ebooks electronic books free online rating news 20162017 is books that can provide inspiration, insight, knowledge to the reader. Cossairt, member, ieee and ashok veeraraghavan, member, ieee f abstractover the last decade, a number of computational imaging ci systems have been proposed for tasks such as motion. Computational imaging approaches lead to the abstraction of. Related research several academic and industrial research teams around the world are developing a variety of computational cameras. Coded aperture gammaray imaging with stochastic apertures. Pdf comprehensive simulation platform for a metamaterial. The dynamic aperture consists of a microstrip transmission line with an array of radiating, complementary, subwavelength metamaterial irises patterned into the upper conductor.
Optical design and characterization of an advanced computational imaging system. We present a dynamic metamaterial aperture for use in computational imaging schemes at microwave frequencies. Computational imaging 6 massachusetts institute of. Aug 01, 20 metamaterial apertures for coherent computational imaging on the physical layer. A framework for analysis of computational imaging systems. Computational imaging advanced computer graphics spring.
Gehm duke university fitzpatrick center for photonics, durham, nc, 27708 abstract a spectral imager provides a 3d data cube in which the spatial information 2d of the image is complemented by spectral information 1d a bout each spatial location. Nov 17, 2015 we present a dynamic metamaterial aperture for use in computational imaging schemes at microwave frequencies. Compressive imaging spectrometers using coded apertures d. A metamaterial aperture operating as a leaky waveguide with resonating metamaterial irises can sweep its operation frequency to modify its complex field pattern with no moving parts. Analysis of folded imaging system and multiple apertures virtual and mixed reality neareyedisplays. Massachusetts institute of technology department of computer science and electrical engineering 6. Large metasurface aperture for millimeter wave computational imaging at the humanscale article pdf available in scientific reports 7. A framework for analysis of computational imaging systems kaushik mitra, oliver cossairt, ashok. Computational imaging digital cameras now commonplace.
Smith1,4 by leveraging metamaterials and compressive imaging, a lowprofile aperture capable of microwave imaging without lenses, moving parts, or phase shifters is demonstrated. Resolution of the frequency diverse metamaterial aperture imager okan yurduseven1, mohammadreza f. Inverse synthetic aperture radar imaging with matlab algorithms. Phase retrieval from intensity measurements is one of the most challenging computational imaging problems. Applications in synthetic aperture imaging, phase retrieval, and digital holography. Using conventional materials, the resolution of focusing and imaging devices is limited by diffraction to about half the wavelength of light, as high spatial frequencies do not propagate in. It can be used in several domains such as neutrons, a particles imaging. Osa design considerations for a dynamic metamaterial.
Security screening via computational imaging using frequency. The aperture consists of an array of complementary, resonant metamaterial elements. Metamaterial apertures for computational imaging science. Smith1, 3 abstractthe resolution of a frequency diverse compressive metamaterial aperture imager is investigated. Computational imaging massachusetts institute of technology. Metamaterial apertures for coherent computational imaging on. Simulations of 2d metamaterial apertures for coherent. In this example, it is shown that how differently configured in and outcoupling gratings affect the field at the exit of the waveguide, and. In recent research trends, the modern computational imaging paradigms, including coded apertures 8, singlepixel imaging 9, and frequencydiverse imaging 10, have shown to be capable of. By leveraging metamaterials and compressive imaging, a lowprofile aperture capable of microwave imaging without lenses, moving parts, or phase shifters is demonstrated. Computational optical imaging optique numerique active light 3dwinter 20 ivo ihrke with slides by thorsten thormaehlen. In 2015, sleasman and colleagues presented a dynamic metamaterial aperture designed for microwave computational imaging schemes by leveraging a metamaterial element with two diodes connected to an. Tuning the response of the metamaterial allowed imaging of a scene with a 40.