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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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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Image Formation Digital Camera The Eye Film
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source ?
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 A photon’s life choices Absorption Diffuse Reflection Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 A photon’s life choices Absorption Diffusion Specular Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ1λ1 light source λ2λ2
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection t=1 light source t=n
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 A photon’s life choices Absorption Diffusion Reflection Transparency Refraction Fluorescence Subsurface scattering Phosphorescence Interreflection λ light source (Specular Interreflection)
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 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
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Sensor Array
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 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
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Retina
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Retina up-close Light
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Color Image (RGB) R G B
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Images representation as a matrix 0.920.930.940.970.620.370.850.970.930.920.99 0.950.890.820.890.560.310.750.920.810.950.91 0.890.720.510.550.510.420.570.410.490.910.92 0.960.950.880.940.560.460.910.870.900.970.95 0.710.81 0.870.570.370.800.880.890.790.85 0.490.620.600.580.500.600.580.500.610.450.33 0.860.840.740.580.510.390.730.920.910.490.74 0.960.670.540.850.480.370.880.900.940.820.93 0.690.490.560.660.430.420.770.730.710.900.99 0.790.730.900.670.330.610.690.790.730.930.97 0.910.940.890.490.410.78 0.770.890.990.93 0.920.930.940.970.620.370.850.970.930.920.99 0.950.890.820.890.560.310.750.920.810.950.91 0.890.720.510.550.510.420.570.410.490.910.92 0.960.950.880.940.560.460.910.870.900.970.95 0.710.81 0.870.570.370.800.880.890.790.85 0.490.620.600.580.500.600.580.500.610.450.33 0.860.840.740.580.510.390.730.920.910.490.74 0.960.670.540.850.480.370.880.900.940.820.93 0.690.490.560.660.430.420.770.730.710.900.99 0.790.730.900.670.330.610.690.790.730.930.97 0.910.940.890.490.410.78 0.770.890.990.93 0.920.930.940.970.620.370.850.970.930.920.99 0.950.890.820.890.560.310.750.920.810.950.91 0.890.720.510.550.510.420.570.410.490.910.92 0.960.950.880.940.560.460.910.870.900.970.95 0.710.81 0.870.570.370.800.880.890.790.85 0.490.620.600.580.500.600.580.500.610.450.33 0.860.840.740.580.510.390.730.920.910.490.74 0.960.670.540.850.480.370.880.900.940.820.93 0.690.490.560.660.430.420.770.730.710.900.99 0.790.730.900.670.330.610.690.790.730.930.97 0.910.940.890.490.410.78 0.770.890.990.93 R G B row column
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Color Spaces RGB HSV YCbCr L*a*b*
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Luminance - Chrominance Luminance: brightness Chrominance: color Luminance only, Chrominance only, and full color image.
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Color - Grayscale
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Grayscale Image 0.920.930.940.970.620.370.850.970.930.920.99 0.950.890.820.890.560.310.750.920.810.950.91 0.890.720.510.550.510.420.570.410.490.910.92 0.960.950.880.940.560.460.910.870.900.970.95 0.710.81 0.870.570.370.800.880.890.790.85 0.490.620.600.580.500.600.580.500.610.450.33 0.860.840.740.580.510.390.730.920.910.490.74 0.960.670.540.850.480.370.880.900.940.820.93 0.690.490.560.660.430.420.770.730.710.900.99 0.790.730.900.670.330.610.690.790.730.930.97 0.910.940.890.490.410.78 0.770.890.990.93
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Use of Color in Computer Vision
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Color histograms for image matching
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Color Histogram for Image Matching
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Image Segmentation and Retrieval
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Skin Detection
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Robot Soccer
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Computer Vision Teknik Informatika-Semester Ganjil 2015-2016 Building Appearance Models for Tracking
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