Methods and apparatus for calibrating focused plenoptic camera data
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United States of America Patent
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Aug 12, 2014
Grant Date -
May 23, 2013
app pub date -
Nov 30, 2010
filing date -
Aug 27, 2010
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Abstract
Methods, apparatus, and computer-readable storage media for calibrating focused plenoptic camera data. A calibration technique that does not modify the image data may be applied to raw plenoptic images. Calibration parameters, including but not limited to tilt angle, corner crops, main lens distance from the microlens array, sensor distance from the microlens array, and microimage size, may be specified. Calibration may include scaling down the input texture coordinates for the plenoptic image so that the new coordinate range fits the size of the texture with crops taken into account. These coordinates may be further transformed by one or more of a matrix performing a scaling, to correct for lens distortion; a rotation, to correct for tilts; and a translation that finalizes the necessary corner crops. A transformation matrix is generated that can be applied to the raw image by radiance processing techniques such as super-resolution techniques.
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