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Outline Sources of blur Deconvolution Blind deconvolution Why are our images blurry? Lens imperfections aberration chromatic aberration diffraction 衍射 Camera shake Scene motion Depth defocus Point spread function (PSF): The blur kernel of a lens

Outline Focal stack. Confocal stereo. Lightfield. Measuring lightfields. Plenoptic camera. Focal Stack capture images focused at multiple planes, and merge them into a single all in-focus image analogous to what we did in HDR, focal stack instead of expo

Outline Sensor noise. Noise calibration. Optimal weights for HDR Sensor Noise Note: we will only consider per-pixel noise. We won’t consider cross-pixel effects such as blooming , smearing, cross-talk… Where does the noise come from Poisson distributio

Exposure and high dynamic range imaging Overview Exposure control. Light metering. Our devices do not match the world. High dynamic range imaging. Radiometric calibration. Other aspects of HDR imaging. Tonemapping. Exposure control Exposure=Gain×Irradian

Mpq=def∑x∑yxpyqI(x,y) M_{pq}\xlongequal{def}\sum_x \sum_y x^p y^q I(x, y) Mpq​defx∑​y∑​xpyqI(x,y) so the centroid of image is (x,y)=(M10M00,M01M00) (x,y) = \left( \frac{M_{10}}{M_{00}},\frac{M_{01}}{M_{00}} \right) (x,y)=(M00​M10​​,M00​M01​​) compute mom