02Imageformation

02Imageformation - January 2010 Image formation...

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Unformatted text preview: January 2010 Image formation & processing Sunday, January 10, 2010 Image Formation Geometry of image formation (camera models and calibration) where? Radiometry of image formation how bright? 2 Sunday, January 10, 2010 Digital images Were interested in digital images, which may come from An image originally recorded on film Digitized from negative or from print Analog video camera Digitized by frame grabber Digital still camera or video camera Sonar, radar, ladar (laser radar) Various kinds of spectral or multispectral sensors Infrared, X-ray, Landsat Normally, well assume a digital camera (or digitized analog camera) to be our source, and most generally a video camera (spatial and temporal sampling) 3 Sunday, January 10, 2010 What is a Camera? A camera has many components Optics: lens, filters, prisms, mirrors, aperture Imager: array of sensing elements (1D or 2D) Scanning electronics Signal processing ADC: sampling, quantizing, encoding, compression May be done by external frame grabber (digitizer) Sunday, January 10, 2010 What is a Camera? A camera has many components Optics: lens, filters, prisms, mirrors, aperture Imager: array of sensing elements (1D or 2D) Scanning electronics Signal processing ADC: sampling, quantizing, encoding, compression May be done by external frame grabber (digitizer) And many descriptive features Imager type: CCD or CMOS Imager number SNR Lens mount Color or B/W Analog or digital (output) Frame rate Manual/automatic controls Shutter speeds Size, weight Cost Sunday, January 10, 2010 Camera output: A raster image Raster scan A series of horizontal scan lines, top to bottom Progressive scan Line 1, then line 2, then line 3, Interlaced scan Odd lines then even lines Sunday, January 10, 2010 Camera output: A raster image Raster scan A series of horizontal scan lines, top to bottom Progressive scan Line 1, then line 2, then line 3, Interlaced scan Odd lines then even lines Raster pattern Progressive scan Sunday, January 10, 2010 Camera output: A raster image Raster scan A series of horizontal scan lines, top to bottom Progressive scan Line 1, then line 2, then line 3, Interlaced scan Odd lines then even lines Raster pattern Progressive scan Interlaced scan Sunday, January 10, 2010 Camera output: A raster image Raster scan A series of horizontal scan lines, top to bottom Progressive scan Line 1, then line 2, then line 3, Interlaced scan Odd lines then even lines Raster pattern Progressive scan Interlaced scan Sunday, January 10, 2010 Camera output: A raster image Raster scan A series of horizontal scan lines, top to bottom Progressive scan Line 1, then line 2, then line 3, Interlaced scan Odd lines then even lines Raster pattern Progressive scan Interlaced scan Sunday, January 10, 2010 Camera output: A raster image...
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This note was uploaded on 12/29/2011 for the course ECE 181b taught by Professor Staff during the Fall '08 term at UCSB.

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02Imageformation - January 2010 Image formation...

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