Tentative Schedule

Class Canceled (Instructor Travel)
Buzzwords: Affine transformation, transformation matrix, scaling, rotation, identity matrix, translation, camera projection, matrix decomposition, singular value decomposition, unitary matrix, orthogonal vector
Buzzwords: Inner product, projection, Fourier Series, Fourier Transform, Discrete Fourier Transform, spectrum, low-pass filter, high-pass filter
Buzzwords: Nyquist-Shannon sampling theorem, signal sampling, signal reconstruction, convolution, convolution theorem, compressive sensing
    Suggested Reading:
  • Image Filtering Tutorial. Nice illustrations of filtering/convolutions. Has more filter types than what we discussed in the class.
Human Visual System
9/16 9/21
Buzzwords: Eyes, retina, fovea, foveated rendering, photoreceptors, cones, rods, blind spot, light spectrum, spectral power distribution, photopic vision, scotopic vision, luminous efficiency function, lumen, cone fundamentals, color blindness, dichromat, unilateral dichromat, isochrome, tetrachromacy, invisible light, visual cortex, metamerism, metamer, color matching experiment, color matching function, trichromatic theory of color, color space
Buzzwords: Colorimetry, color cube, gamut, quantization, chromaticity, chromaticity plot, chromaticity gamut, XYZ color space, reference white, black-body radiation, Planckian locus, color temperature, correlated color temperature, sRGB, additive color model, subtractive color model, perceptual color space, HSV, HSL, HSB, hue, saturation, value, lightness, brightness, CMYK, gamma, MacAdam ellipses
Color in Nature, Arts, and Technologies
9/28 9/30
Buzzwords: Thermal radiation, bioluminescence, electroluminescence, biofluorescence, absorption, scattering, emission, transparent, translucent, opaque, reflectance, glazing, vanish, incomplete hiding, spectroradiometer, spectrophotometer, fluorescent light, phosphor, color rendering index, emissive display, light-filtering display, LED, LCD, liquid crystal, polarizer, white LED, phosphor-converted LED, field sequential color, FSC, color wheel, DLP projector, digital micromirror device, DMD, color breakup, three-chip projector, motion blur, solid angle, irradiance, radiance, nits, lux, brightness, dynamic range
    Required Reading:
10/5 10/7
    Required Reading:
  • Chapter 5.7, Digital Modeling of Material Appearance. It has a nice discussion radiometry metrics and emission/absorption/scattering. Physically-based as far as rendering is concerned.
Digital Camera Imaging

Buzzwords: Pinhole camera, motion blur, convex lens, concave lens, Snell's law, refraction index, gravitational lens, waveguide, thin lens approximation, paraxial approximation, gaussian lens equation, circle of confusion, depth of field, F-number, magnification factor, field-of-view, think lens, optical aberration, chromatic aberration, monochromatic aberration, spherical aberration, motion from blur, depth from blur
    Suggested Reading:
  • Chapter 6.3, Optics (5e). Again, skip the detailed math if you want. Try to focus on understanding the concept of different aberrations.
Buzzwords: IR filter, UV filter, microlens, photoelectric effect, photodiodes, quantum efficiency, light-matter interaction, energy-harvesting camera, pixel well, full-well capacity, saturation, dynamic range, high dynamic range, NIR photography, thermographic camera, IR camera, depth sensing, fill factor, charge-to-voltage conversion, voltage gain, CCD sensor, CMOS sensor, rolling shutter, global shutter, analog-to-digital conversion, ADC, resolution
    Required Reading:
  • Chapter 3 of Image Sensors and Signal Processing for Digital Still Cameras. It has an in-depth discussion of the various aspects of camera sensors. What's relevant for today's lecture is Chapter 3.1 and 3.2. You can safely skip the math there, but going through it gives you a nice technical understanding of the topic.
    Suggested Reading:
  • Image Sensor (Computer Vision: A Reference Guide, 2nd Edition). Very brief, but gives you an overall idea. Skip the noise part, which we will get to in next lecture.
Buzzwords: bayer filter, CYGM filter, aliasing, anti-aliasing filter, demosaic, noise, fixed pattern noise, photon shot noise, dark current noise, read noise, Poisson distribution, signal to noise ratio, signal gain, ISO, dynamic range
Buzzwords: demosaic, white balancing, image signal processing, ISP, camera serial interface, systems-on-a-chip, SoC, Denoising, spatial denoising, temporal denoising, filtering, convolution, mean filter, moving average filter, Gaussian filter, low-pass filter, bilateral filter, luminance denoising, chroma denoising
Buzzwords: HDR imaging, tone mapping, graduated neutral density filter, GND, multiple exposures, radiance map, linear tone mapping, global tone mapping, local tone mapping, contrast, local contrast, HDR look
    Required Reading:
  • Tones and Contrast and Tone Curve in Photoshop. They talk about the notion of tone and contrast as well as how changing image tones on a standard DR image changes the visual effects. An interesting thing to note is that tone mapping in SDR images usually uses an S-shape curve that increases the contrast in midtones and compress contrasts in highlights and shadows, whereas tone mapping curves for HDR images tend to be inverse-S shape to bring out details in highlights and shadows.
  • Play with the interactive tutorial on exploring camera color space and color correction.
Buzzwords: Feedback-driven optimization, color constancy, chromatic adaptation, neutral point, white point, illuminant, von Kries adaptation model, auto white balancing, AWB, active AF, passive AF, phase detection, contrast detection, PDAF, CDAF, cross-correlation, autofocus point, dual pixel AF, time-of-flight, depth from stereo, structured light, metering
Buzzwords: Encoder, decoder, codec, lossless, lossy, luma, chroma, chroma subsampling, Y'CbCr, JPEG, DCT, basis function, quantization matrix, entropy encoding, run-length encoding, RLE, Motion-JPEG, M-JPEG, MPEG, H.262, H.264, H.265, AVC, HEVC, container former, .mp4, intra-frame prediction, inter-frame prediction, motion estimation, motion compensated interpolation, three step search, residual, macroblock, motion vector, reference frame, I-frame, P-frame, B-frame, GoP, sub-pixel motion, transcoding
Buzzwords: Panorama, field of view, FOV, telephoto lens, long-focus lens, perspective projection, ghosting, cylindrical projection, spherical projection, distortion, equirectangular projection, cubemap projection, optical flow, camera rig, omnidirection stereo, VR tax, semantic-aware streaming
Modeling and Rendering
Buzzwords: Photo-realism, computer-generated imagery, parametric surface, parametric curve, polygon mesh, triangle mesh, point cloud, point set, normal, polygon triangulation, bezier curve, bezier surface, basis functions, Bernstein polynomials, LiDAR, point set triangulation, Delaunay triangulation
Buzzwords: rasterization, ray tracing, image-centric, object-centric, visibility, shading, local frame, world frame, camera space, raster space, perspective projection, orthographic projection, environmental camera, near-clipping plane, far-clipping plane, barycentric coordinates, depth-buffer, z-buffer
    Suggested Reading:
  • Read the first four chapters on this Scratchapixel lession on Rasterization: a Practical Implementation.
  • Both this Scratchapixel article and Chapter 7.2 and 7.3 of Fundamentals of Computer Graphics (4e) talk about how to calculate the perspective transformation matrix. They use different conventions but the principle is the same. Go over them to reinforce your understanding. Pay attention to details.
Buzzwords: recursive ray tracing, ray-triangle intersection, acceleration structures, space-partitioning trees, octree, kd-tree, bounding volume hierarchy, BVH
Thanksgiving Holiday
Thanksgiving Holiday
Buzzwords: Rendering equation, bidirectional reflectance distribution function, BRDF, emitted radiance, path tracing, Monte-Carlo integration, variance, bias, Monte-Carlo path tracing, specular lobe, caustic, bidirectional path tracing, texture map, texture mapping, texel, UV unwrapping, UV map, UV island, texture sampling, texture filtering, normal map
Buzzwords: shader, vertex shader, fragment shader, alpha blending, shader core, ROP, SIMD, control-flow divergence, fine-grained multi-threading, GPGPU, kernel, RT cores, OptiX, CUDA, tensor core, DLSS
    Required Reading:
  • Graphics Rendering: What's New and What's in it for Architects? (Part 1 and Part 2)
    Suggested Reading:
  • GPU Computing (Proceedings of the IEEE, 2008). Not the most recent article, but still provides a good overview of the transition from GPU to GPGPU.
Medical Imaging (Guest Lecture by Xiao Wang)
Buzzwords: Eye piece, eye relief, virtual display, motion to photon latency, motion tracking, DoF, IMU, gyroscope, accelerometer, inside-out/outside-in tracking, teleportation, stereopsis, vergence-accommodation conflict, multi/vari-focal display, lightfield display, gaze tracking, foveated rendering, ventral metarism, foveated ray tracing
Buzzwords: Herculaneum Papyri, Archimedes Palimpsest, The Old Guitarist, The Martellus Map, The Hunt-Lenox Globe, multispectral imaging, micro CT, structure from motion