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Introduction to Computer Vision - Digital Image Fundamental | CSE 185, Assignments of Computer Science

University of California-MercedComputer Science
Prof. Shawn Newsam

Material Type: Assignment; Professor: Newsam; Class: Introduction to Computer Vision; Subject: Computer Science & Engineering; University: University of California-Merced; Term: Spring Semester 1992;

Typology: Assignments

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CSE185
Fall 2008
Lecture 9
Digital Image Fundamentals
Digital Image Processing, 3rd ed.
Digital Image Processing, 3rd ed.
www.ImageProcessingPlace.com
© 1992–2008 R. C. Gonzalez & R. E. Woods
Gonzalez & Woods
Today
• Digital Image Fundamentals (Chap. 2)
• Midterm moved to Wed. 11/5
Digital Image Processing, 3rd ed.
Digital Image Processing, 3rd ed.
www.ImageProcessingPlace.com
© 1992–2008 R. C. Gonzalez & R. E. Woods
Gonzalez & Woods
Assignments
• HW #1 due Wed. 10/1 by midnight
Digital Image Processing, 3rd ed.
Digital Image Processing, 3rd ed.
www.ImageProcessingPlace.com
© 1992–2008 R. C. Gonzalez & R. E. Woods
Gonzalez & Woods
Chap 2: Light and the electromagnetic spectrum
• Three types of cones
Digital Image Processing, 3rd ed.
Digital Image Processing, 3rd ed.
www.ImageProcessingPlace.com
© 1992–2008 R. C. Gonzalez & R. E. Woods
Gonzalez & Woods
Chap 2: Light and the electromagnetic spectrum
• Hyperspectral imaging
Digital Image Processing, 3rd ed.
Digital Image Processing, 3rd ed.
www.ImageProcessingPlace.com
© 1992–2008 R. C. Gonzalez & R. E. Woods
Gonzalez & Woods
Chap 2: Image sensing and acquisition
• Producing a digital image
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Download Introduction to Computer Vision - Digital Image Fundamental | CSE 185 and more Assignments Computer Science in PDF only on Docsity!

CSE

Fall 2008

Lecture 9

Digital Image Fundamentals

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com © 1992–2008 R. C. Gonzalez & R. E. Woods

Gonzalez & Woods

Today

• Digital Image Fundamentals (Chap. 2)

• Midterm moved to Wed. 11/

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com © 1992–2008 R. C. Gonzalez & R. E. Woods

Gonzalez & Woods

Assignments

• HW #1 due Wed. 10/1 by midnight

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com © 1992–2008 R. C. Gonzalez & R. E. Woods

Gonzalez & Woods

Chap 2: Light and the electromagnetic spectrum

• Three types of cones

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com

Gonzalez & Woods

Chap 2: Light and the electromagnetic spectrum

• Hyperspectral imaging

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com

Gonzalez & Woods

Chap 2: Image sensing and acquisition

• Producing a digital image

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com © 1992–2008 R. C. Gonzalez & R. E. Woods

Gonzalez & Woods

Chap 2: Image sensing and acquisition

• Producing a digital image using a single sensor

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com © 1992–2008 R. C. Gonzalez & R. E. Woods

Gonzalez & Woods

Chap 2: Image sensing and acquisition

• Producing a digital image using a sensor strip

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com © 1992–2008 R. C. Gonzalez & R. E. Woods

Gonzalez & Woods

Chap 2: Image sensing and acquisition

• Producing a digital image using a sensor array

• CCD – charge coupled device

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com © 1992–2008 R. C. Gonzalez & R. E. Woods

Gonzalez & Woods

Chap 2: Image sensing and acquisition

• CCD sizes/cost

Hasselblad H3D-39 7212 5412 39031344 $31,995. Hasselblad H3D-31 6496 4872 31648512 $24,995. Canon EOS-1Ds Mark III 5616 3744 21026304 $7,999. Canon EOS-1DS Mark II 4992 3328 16613376 $6,999. Kodak EasyShare Z1275 4000 3000 12000000 $207. Kodak EasyShare V1003 3648 2736 9980928 $168. Fujifilm FinePix A900 3488 2616 9124608 $155. Fujifilm FinePix A820 3296 2472 8147712 $143. Samsung S730, 7.2 Megapixel 3072 2304 7077888 $117. Kodak EasyShare C653 2848 2144 6106112 $109. Nikon Coolpix L10 2560 1920 4915200 $99. Digital Concepts Kidz Cam 640 480 307200 $19. camera width heightresolutiontotal cost

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com

Gonzalez & Woods

Chap 2: Image sensing and acquisition

• CCD sizes/cost

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com

Gonzalez & Woods

Chap 2: Image sensing and acquisition

• Acquiring color images using a single CCD

• Bayer filter

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com © 1992–2008 R. C. Gonzalez & R. E. Woods

Gonzalez & Woods

Chap 2: I mage sampling and quantization

• For sensing arrays:

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com © 1992–2008 R. C. Gonzalez & R. E. Woods

Gonzalez & Woods

Chap 2: I mage sampling and quantization

• Representing digital images

f(s,t) f(x,y)

continuous discrete (digital)

s,t ∈real numbers x,y ∈integers

x =0,1,2,…, M -

y =0,1,2,…, N -

s,t have physical meaning x,y are unitless

sampling

quantization

f ∈real numbers f ∈real numbers

( f ∈integers)

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com © 1992–2008 R. C. Gonzalez & R. E. Woods

Gonzalez & Woods

Chap 2: I mage sampling and quantization

• Representing (rendering) digital images

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com © 1992–2008 R. C. Gonzalez & R. E. Woods

Gonzalez & Woods

Chap 2: I mage sampling and quantization

• Representing digital images

• Digital image: f ∈integers

• Number of intensity levels is typically an

integer power of 2:

– L =2 k

– f ∈ [0,1,2,…, L - 1 ]

– “ k - bit image”

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com

Gonzalez & Woods

Chap 2: I mage sampling and quantization

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed.

www.ImageProcessingPlace.com

Gonzalez & Woods

Chap 2: Image sampling and quantization

• Spatial and intensity resolution

• Dots (pixels) per inch is a common way to

specify spatial resolution of rendered image

– Newspapers: 75 dpi

– Magazines: 133 dpi

– Our text: 2400 dpi

• dpi limits the amount of detail that can be

rendered

Digital Image Processing, 3rd ed.Digital Image Processing, 3rd ed. www.ImageProcessingPlace.com © 1992–2008 R. C. Gonzalez & R. E. Woods

Gonzalez & Woods

Chap 2: Image sampling and quantization

  • Effects of varying the number of samples (spatial resolution)