Illustration of image processing, MATLAB in Engineering

Illustration of Image processing:

This displays that there are 64 rows, or in another word, 64 colors, in this specific colormap. It also displays that the first five colors are shades of blue.

The format of calling the image function is as shown below:


here the matrix mat is a matrix which represents the colors in an m × n image. When the matrix has the size m × n, then each and every element is an index into the present colormap.

The one way to show the colors in the jet colormap (that has 64 colors) is to generate a matrix which stores the values 1 through 64, and pass that to the image function, as shown in figure.

2081_Illustration of Image processing.png

Whenever the matrix is passed to the image function, then the value in each element in matrix is used as an index into the colormap. For illustration, the value in cmap(1,2) is 9, therefore the color displayed in position(1,2) in the image will be the color presented by the ninth row in the colormap. By using numbers 1 through 64, we can see all colors in this colormap.

>> cmap = reshape(1:64, 8,8)

cmap =

1687_Illustration of Image processing1.png


This represents that the first colors are shades of blue, the end colors are shades of red, and in between there are shades of aqua, green, yellow, & orange.

Posted Date: 10/22/2012 8:32:35 AM | Location : United States

Related Discussions:- Illustration of image processing, Assignment Help, Ask Question on Illustration of image processing, Get Answer, Expert's Help, Illustration of image processing Discussions

Write discussion on Illustration of image processing
Your posts are moderated
Related Questions
Interchange rows : for illustration interchanging rows ri and rj is written as

Use of While loop: Here is an illustration of calling the function, passing 5000 for the value of the input argument high. >> factgthigh(5000) ans = 5040 The itera

Plotting from a Function: The following function creates a Figure Window as shown in figure, which shows various types of plots for similar y vector. The vector is passed as a

Patch function - graphics objects: The patch function is used to generate a patch graphics object, which is made from 2-dimensional polygons. The patch is defined by its verti

Algorithm for subfunction: The algorithm for subfunction askforn is as shown:  Prompt the user for the positive integer n.  Loop to print an error message and reprom

Reading from a Mat-File: The load function is used to read from various types of files. As with save function, by default the file will be supposed to be a MAT-file, and load

Image Processing: The Images are represented as grids, or matrices, of picture elements (known as pixels). In MATLAB an image usually is represented as a matrix in which each

Vectors of Structures: In numerous applications, involving database applications, information generally would be stored in the vector of structures, instead of in individual s

Storing Strings in Cell Arrays: The one good application of a cell array is to store strings of various lengths. As cell arrays can store various types of values in the elemen