w112348的博客

1 适用于灰度图像或者三通道图像的降采样def downsampling(img, k): """ Down-sample an image of shape (h, w) into an image of shape(h/k, w/k), by averaging every k*k elements. img: an image of 2D or 3D k: edge length of the kernel Can apply t

查看照片信息：dcraw -i -v [image]color options-w: use the white balance specified by camera-o 1: specify output color space as sRGBinterpolation options-q 3: interpolation with highest quality-d/D/E: no interpolationoutput options-4: linear 16 bit-T: w

OutlineLight sources.Some notes about radiometry.Photometric stereo.Uncalibrated photometric stereo.Generalized bas-relief ambiguity.Light sourcessome useful lighting modelsplenoptic function (function on 5D domain)L(x,ω)L(x, \omega)L(x,ω)

OutlineThe coded photography paradigmDealing with depth blurcoded aperturefocal sweepgeneralized opticsDealing with motion blurcoded exposureparabolic sweepDealing with depth blurThe coded photography paradigmCoded apertureAperture

OutlineSources of blurDeconvolutionBlind deconvolutionWhy are our images blurry?Lens imperfectionsaberrationchromatic aberrationdiffraction 衍射Camera shakeScene motionDepth defocusPoint spread function (PSF): The blur kernel of a lens

OutlineColor and human color perceptionRetinal color spaceColor matchingLinear color spaceChromaticityColor calibrationNon-linear color spaceColor and human color perceptionIlluminant spectral power distribution: abbr SPDSpectral reflectance

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

OutlineSensor noise.Noise calibration.Optimal weights for HDRSensor NoiseNote: 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 fromPoisson distributio

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