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ImageFormation - Image Formation The two parts of the image...

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Image Formation The two parts of the image formation process The geometry of image formation which determines where in the image plane the projection of a point in the scene will be located. The ph ysics of light which determines the brightness of a point in the image plane as a function of illumination and surface properties. A simple model - The scene is illuminated by a single source. - The scene reflects radiation towards the camera. - The camera senses it via chemicals on film.
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-2- Camera Geometry - The simplest device to form an image of a 3D scene on a 2D surface is the "pinhole" camera. - Rays of light pass through a "pinhole" and form an inverted image of the object on the image plane. Camera Optics - In practice, the aperture must be larger to admit more light. - L ens are placed in the aperture to focus the bundle of rays from each scene point onto the corresponding point in the image plane.
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-3- Diffraction and Pinhole Optics - If we use a wide pinhole, light from the source spreads across the image (i.e., not properly focused), making it blurry. - If we narrow the pinhole, only a small amount of light is let in.
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