2.image formation (backup slide 2)
TRANSCRIPT
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
Image Formation
Image Formation
Image Formation
Image Formation
Mammography Machine
Mammography Machine
Image Formation
Image Formation
Image Formation
Original image from MIAS database
Grayscale (Unit8 )Intensity range: 0-255
(3 channel)
Image Formation
Grayscale (Unit8 )Intensity range: 0-255
(3 channel)To
Grayscale ( Uint8)Intensity range: 0-255
(single channel)
rgb2
gray(img)
Image Formation
im2double(img)
Intensity Range: 0-1 (3 channel)
Image Formation
I2 = im2double(I1)
converts the intensity
image I1 to double
precision,
rescaling the data if
necessary.
Image Formation
Grayscale (Double)Intensity range: 0-1
(3 channel)To
Grayscale ( Double )Intensity range: 0-1
(single channel)
rgb2gray(im)
Image Formation
Image Formation
Image Formation
Along x-axis
Along Y-axis
Image Formation
Image Formation
Image Formation
Image Formation
Image Formation
Digital Image
Digital Image
Intensity range: 0-255 (3 channel)
Intensity range: 0-255 (single channel)
Digital Image
Digital Image
Digital Image
A Simple Image Formation Model
A Simple Image
Formation ModelThe Illumination- Reflectance Model
A Simple Image
Formation ModelThe Illumination- Reflectance Model
Image as 2D lightIntensity function
Reflection
Illumination
Simple Imaging Model
Simple Imaging Model
Simple Imaging Model
Simple Imaging Model
• 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
• (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
