Alessio Di Simone Tutor Daniele Riccio XXIX Cycle

Alessio Di Simone Tutor: Daniele Riccio XXIX Cycle - I year presentation Information extraction from a single SAR image

My personal background • MSc in Telecommunications Engineering – Università di Napoli Federico II • Fellowship – MIUR – FSG research program "Sistemi di telecomunicazione innovativi a larga banda anche con impiego di satelliti per utenze differenziate in materia di sicurezza, prevenzione e intervento in caso di catastrofi naturali” Remote Sensing Research Group Electromagnetics Research Group DIETI Alessio Di Simone 2

Rationale: SAR images dependencies Unknown parameters SAR Image dependencies Electromagnetic parameters Surface parameters • Dielectric constant (complex) • • Roughness Topography (slopes) Sensor parameters • • Polarization Operating frequency • • Look angle Resolution Geometric parameters Known parameters Alessio Di Simone 3

Problem Statement: Well-posed? Objective Interest Retrieving information from a single SAR image through mathematical and physical (electromagnetic) models Limited availability of resources, e. g. , space missions, developing countries • One equation, many unknowns Ill-posedness q Cannot be removed (intrinsic property of the problem) q Could be circumvented but… Need for an adequate direct model Alessio Di Simone 4

(Fractal) Direct Model Natural Surface Model (f. Bm) Scattering Model (SPM) SAR Image Model Alessio Di Simone 5

Incidence angle [degree] Normalized SAR Image Intensity Dielectric constant Electrical conductivity [S/m] Incidence angle [degree] Hurst coefficient Normalized SAR Image Intensity Sensitivity Analysis Incidence angle [degree] Topothesy [m] SAR image greatest dependency is on the local incidence angle Alessio Di Simone 6

Inversion Procedure Hypotheses • • Electromagnetic homogeneity of the surface, i. e. , constant relative permettivity and electrical conductivity. Scale-invariant roughness, i. e. , constant Hurst exponent and topothesy at any scale. Local slopes can be estimated Sub-hypothesis • Small slope regime, i. e. , gentle topography. Only for simplifying the inversion procedure Direct model linearization against local slopes • No dependency on azimuth slopes Alessio Di Simone 7

High-Level Products – I • SAR Despeckling (Non Local Means Approach) Despeckled image Original SAR image No resolution degradation Alessio Di Simone 8

High-Level Products – II • Local Incidence Angle Map • Digital Elevation Model Alessio Di Simone 9

Next years… • Research activities: – Complete Model, rather than the linearized one. – Incidence angle estimation, rather than local slopes. – Further information retrieving. • Training activities: 3 4 5 6 bimonth Summary Check Estimated Check Total Research bimonth 8 2 Seminars bimonth 30 Credits year 3 1 Modules Credits year 2 bimonth Estimated Credits year 1 3 3 6 3 10 25 20 -40 18 10 -20 6 0 -10 49 1, 2 0, 9 0 1 1 0, 9 5 5 -10 8 5 -10 5 0 -10 18 22 7 5 7 3 6 2 30 10 -35 34 30 -45 49 40 -60 113 60 8, 2 8, 9 10 10 10 12, 9 60 60 Alessio Di Simone 60 180 10

List of publications Journals 1. Di Martino, G. , Di Simone, A. , Iodice, A. , Riccio, D. , “Shape from Shading and SAR Images, ” IEEE Trans. Geosci. and Remote Sens. , (resubmitted). Conferences 1. Di Simone, A. , Riccio, D. , “A New Perspective in Shape from Shading from SAR Images”, IEEE Graduate of the Last Decade (GOLD) Conference, Berlin, June, 5 -6, 2014. 2. Di Martino, G. , Di Simone, A. , Iodice, A. , Riccio, D. , and Ruello, G. , “On shape from Shading and SAR Images: an Overview and a New Perspective, ” International Geoscience and Remote Sensing Symposium (IGARSS), Quebec City, July, 13 -18, 2014. 3. Di Martino, G. , Di Simone, A. , Iodice, A. , Riccio, D. , and Ruello, G. , “Polarimetry and Shape from Shading, ” POLin. SAR Conference, Frascati, January, 26 -30, 2015. (accepted) 4. Di Martino, G. , Di Simone, A. , Iodice, A. , Riccio, D. , and Ruello, G. , “SAR Shape from Shading in Suburban Areas, ” Joint Urban Remote Sensing Event (JURSE), Lausanne, March, 30 – April 1, 2015. (accepted) 5. Di Martino, G. , Di Simone, A. , Iodice, A. , Riccio, D. , and Ruello, G. , “Electromagnetic Model for SAR Shape from Shading, ” Ri. NEm, pp. 277 -280, Padova, September, 15 -18, 2014. Alessio Di Simone 11