Image analysis – Image enhancement or restoration – Artifact removal or suppression
Reexamination Certificate
2008-11-19
2011-11-22
Bhatnagar, Anand (Department: 2624)
Image analysis
Image enhancement or restoration
Artifact removal or suppression
C706S022000, C369S103000
Reexamination Certificate
active
08064720
ABSTRACT:
Signal processing techniques are applied to digital image data to remove the distortion caused by motion of the camera, or the movement of the subject being photographed, or defective optics, or optical distortion from other sources. When the image is captured, the effect of relative motion between the camera and the subject is that it transforms the true image into a blurred image according to a 2-dimensional transfer function. The 2-dimensional transfer function representing the motion is derived using blind estimation techniques or by using information from sensors that detect the motion. The transfer function is inverted and used to define a corrective filter. The filter is applied to the image and the blur due to the motion is removed, restoring the correct image. Another embodiment uses the transfer function to avoid blur by combining multiple consecutive images taken at a fast shutter speed.
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Bhatnagar Anand
Tsai Tsung-Yin
Volpe and Koenig P.C.
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