COMPUTER VISION D10K-7C02 CV03: Light and Optics Dr. Setiawan Hadi, M.Sc.CS. Program Studi S-1 Teknik Informatika FMIPA Universitas Padjadjaran.

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Presentation transcript:

COMPUTER VISION D10K-7C02 CV03: Light and Optics Dr. Setiawan Hadi, M.Sc.CS. Program Studi S-1 Teknik Informatika FMIPA Universitas Padjadjaran

Computer Vision Teknik Informatika-Semester Ganjil Image Formation Digital Camera The Eye Film

Computer Vision Teknik Informatika-Semester Ganjil A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source ?

Computer Vision Teknik Informatika-Semester Ganjil A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source

Computer Vision Teknik Informatika-Semester Ganjil A photon’s life choices Absorption Diffuse Reflection Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source

Computer Vision Teknik Informatika-Semester Ganjil A photon’s life choices Absorption Diffusion Specular Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source

Computer Vision Teknik Informatika-Semester Ganjil A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source

Computer Vision Teknik Informatika-Semester Ganjil A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source

Computer Vision Teknik Informatika-Semester Ganjil A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ1λ1 light source λ2λ2

Computer Vision Teknik Informatika-Semester Ganjil A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source

Computer Vision Teknik Informatika-Semester Ganjil A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection t=1 light source t=n

Computer Vision Teknik Informatika-Semester Ganjil A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source (Specular Interreflection)

Computer Vision Teknik Informatika-Semester Ganjil Digital camera A digital camera replaces film with a sensor array – Each cell in the array is light-sensitive diode that converts photons to electrons – Two common types Charge Coupled Device (CCD) CMOS

Computer Vision Teknik Informatika-Semester Ganjil Sensor Array

Computer Vision Teknik Informatika-Semester Ganjil The Eye – Iris - colored annulus with radial muscles – Pupil - the hole (aperture) whose size is controlled by the iris – What’s the “film”? photoreceptor cells (rods and cones) in the retina

Computer Vision Teknik Informatika-Semester Ganjil Retina

Computer Vision Teknik Informatika-Semester Ganjil Retina up-close Light

Computer Vision Teknik Informatika-Semester Ganjil Color Image (RGB) R G B

Computer Vision Teknik Informatika-Semester Ganjil Images representation as a matrix R G B row column

Computer Vision Teknik Informatika-Semester Ganjil Color Spaces RGB HSV YCbCr L*a*b*

Computer Vision Teknik Informatika-Semester Ganjil Luminance - Chrominance Luminance: brightness Chrominance: color Luminance only, Chrominance only, and full color image.

Computer Vision Teknik Informatika-Semester Ganjil Color - Grayscale

Computer Vision Teknik Informatika-Semester Ganjil Grayscale Image

Use of Color in Computer Vision

Computer Vision Teknik Informatika-Semester Ganjil Color histograms for image matching

Computer Vision Teknik Informatika-Semester Ganjil Color Histogram for Image Matching

Computer Vision Teknik Informatika-Semester Ganjil Image Segmentation and Retrieval

Computer Vision Teknik Informatika-Semester Ganjil Skin Detection

Computer Vision Teknik Informatika-Semester Ganjil Robot Soccer

Computer Vision Teknik Informatika-Semester Ganjil Building Appearance Models for Tracking