in a technique that converts data from text image mode into binary data from text image mode into binary data
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Answer:
One of the most common such schemes is called ASCII. This is just a simple table that lists 256 more-or-less useful characters including the English alphabet, the digits 0-9, symbols like '@' or '=' and so on.
Explanation:
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Explanation:
How an image is converted into matrix ?
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Image ABCD
Let us consider ABCD is an image. Height of image is ‘h’ and width of image is ‘w’. From the image we can say that in x direction image is mapped from x= 20 to x = 220. Similarly in y direction image is mapped from y = 25 to y = 195.
Z is point located in image. Where every point located on image has specific intensity. Let us consider that intensity varies from 0 to 10 as shown at right corner in image. It is grayscale .
Image as function : f(x,y) ε R
which is similar to f: R*R -> R
R² is mapped to R for every value of x (20,220) and y(25, 195) within the specified range of x and y will have intensity , which is in the range ( 0 ,10 ).
Image of a function is : f: [ 20,220] * [ 25,195] -> [ 0,10]
Z ( x, y ) -> z where z ε (0,10) in this way each and every point in image will be defined and thus matrix will be formed.
What about color images ?
A color image is just 3 functions stacked together. Here each function represent intensities of red , blue and green color
Mapping of color image in the form of function :
f:R*R = R*R*R where R*R in L.H.S represent x and y while R*R*R in R.H.S represent intensities of r , b , g.
How image is converted into binary form ?
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Data type of Image
This is UI of MATLAB . So the data type of image is uint8. which is Unsigned integer 8 , 8 means 8 bits. It indicates number of bits allocated to store each intensity value. In this way each and every value in matrix is stored in the form 8 bit value ( binary value
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