Download - 2.Image formation (Backup slide 2)
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Image Formation
Image Source:http://www.sprawls.org/resources/CTIMG/module.htm#1
Department of Computer Science And Engineering
Shahjalal University of Science and Technology
Nashid AlamRegistration No: 2012321028
[email protected] Masters -2 Presentation
(Backup Slides# 2)
Slide Courtesy :
Dr. Mohammed Jahirul Islam
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Image Formation
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Image Formation
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Image Formation
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Image Formation
Mammography Machine
Mammography Machine
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Image Formation
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Image Formation
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Image Formation
Original image from MIAS database
Grayscale (Unit8 )Intensity range: 0-255
(3 channel)
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Image Formation
Grayscale (Unit8 )Intensity range: 0-255
(3 channel)To
Grayscale ( Uint8)Intensity range: 0-255
(single channel)
rgb2
gray(img)
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Image Formation
im2double(img)
Intensity Range: 0-1 (3 channel)
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Image Formation
I2 = im2double(I1)
converts the intensity
image I1 to double
precision,
rescaling the data if
necessary.
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Image Formation
Grayscale (Double)Intensity range: 0-1
(3 channel)To
Grayscale ( Double )Intensity range: 0-1
(single channel)
rgb2gray(im)
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Image Formation
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Image Formation
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Image Formation
Along x-axis
Along Y-axis
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Image Formation
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Image Formation
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Image Formation
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Image Formation
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Image Formation
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Digital Image
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Digital Image
Intensity range: 0-255 (3 channel)
Intensity range: 0-255 (single channel)
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Digital Image
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Digital Image
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Digital Image
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A Simple Image Formation Model
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A Simple Image
Formation ModelThe Illumination- Reflectance Model
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A Simple Image
Formation ModelThe Illumination- Reflectance Model
Image as 2D lightIntensity function
Reflection
Illumination
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Simple Imaging Model
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Simple Imaging Model
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Simple Imaging Model
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Simple Imaging Model
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• Consists of 322 images-- Contains left and right breast images for 161 patients
• Every image is 1024 X 1024 pixels in size
• Represents each pixel with an 8-bit word(8 bit to represent each pixel)
• (0-255)=256 gray level (Monochrome image)• No. of bit required to store image, b= M*N*k
(2k= 256; k=8,M=N=1024)
MIAS Database
Mammography Image Analysis Society (MIAS) -An organization of UK research groups
Database: http://skye.icr.ac.uk/miasdb/miasdb.html
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• (0-255)=256 gray level (Monochrome image)• No. of bit required to store image, b= M*N*k
(2k= 256; k=8,M=N=1024)
MIAS Database
Mammography Image Analysis Society (MIAS) -An organization of UK research groups
Database: http://skye.icr.ac.uk/miasdb/miasdb.html
•No. of bit required to store image, b= M*N*k =(1024*1024*8) bit=8,388,608 bit
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