PPT-Perspective projection

Albrecht Dürer Mechanical creation of a perspective image 1525 Overview of next two lectures The pinhole projection model Qualitative properties Perspective projection matrix Cameras with lenses. 網媒所. 林宏祥. . 2012.10.02. Overview. Orthogonal Projection. -Z. X. x. camera. x. viewport. Perspective . P. rojection. -Z. X. x. camera. x. viewport. d. z. View Volume—orthogonal projection. of Object Features. OBJECT FEATURES. Edges. are lines that represent the boundary. between two faces. . Corners. Represent the intersection of two or. more edges.. Edge. Corner. Edge. No edge. No corner. Projection • Projection Arm: The projection arm will rotate to project time on the wall or ceiling. • Focus Wheel: Adjust projection focus by turning the wheel on the back of the Camera geometry and image alignment. Josef . Sivic. http://. www.di.ens.fr. /~josef. INRIA, . WILLOW, ENS/INRIA/CNRS UMR 8548. Laboratoire. . d’Informatique. , . Ecole. . Normale. . Supérieure. map. orthographic projection. map. orthographic projection. orthographic projection. 3D Modeling by. Orthographic Projection. Classic Isometric (3/4) View. x. 0. = 0 x. 1. = 2x x. 2. = 4x x. CS 776 Spring . 2014. Cameras & Photogrammetry . 1. Prof. . Alex Berg. (Slide credits to many folks on individual slides). Cameras & Photogrammetry 1. Albrecht . Dürer. . early 1500s. Brunelleschi, early 1400s. RATHER DRAWING. DEEPAK SAMEER JHA. LOVELY SCHOOL ENGINEERING. WHAT DO YOU UNDERSTAND LOOKING AT THE FIGURES SHOWN BELOW?. SQUARE PLANE. RECTANGULAR PLANE. CIRCULAR. DISC. C. Y. L. I. ND. E. R. C. ONE. Computer Vision and Image Processing (CVIP). Ifeoma. Nwogu. inwogu@buffalo.edu. Lecture 4 – Image formation(part I). Schedule. Last class . linear algebra . overview . Today. Image formation and camera properties. RATHER DRAWING. DEEPAK SAMEER JHA. LOVELY SCHOOL ENGINEERING. WHAT DO YOU UNDERSTAND LOOKING AT THE FIGURES SHOWN BELOW?. SQUARE PLANE. RECTANGULAR PLANE. CIRCULAR. DISC. C. Y. L. I. ND. E. R. C. ONE. & . Sphere GCS. Celina Bolding & James Hughes. Historical Stereographic Projections. Believed to be one of the world’s oldest projections. Hipparchus (190 – 120 BCE) & Ptolemy (90 – 168 BCE) . Stan Birchfield. MTF measures camera sharpness. Optical transfer function (OTF). Fourier transform of impulse response. Modulation transfer function (MTF). Magnitude of OTF. Spatial frequency response (SFR). The only kind of map that can show the Earth accurately is a globe.. Projections are ways of transferring the curved surface of the Earth onto a flat map.. Arthur Robinson created the Robinson Projection Map – the shape and size of the continents near the equator are accurate, but the water areas and lands near the poles are distorted to match the shape of the map.. Nima. . Bigdely-Shamlo. , Tim Mullen, . Ozgur. . Yigit. Balkan. Swartz Center for Computational Neuroscience. INC, UCSD, 2011. Outline. Current EEGLAB Workflow. STUDY IC Clustering. Issues with IC Clustering. General case: cameras can be arbitrary locations and orientations. Binocular stereo. Special case: cameras are parallel to each other and translated along X axis. Z axis. X axis. Stereo with . rectified cameras.