MATLAB Practice Program (to find the maximum gray level image, minimum gray, average gray)

Turn from http://www.cnblogs.com/tiandsp/archive/2012/01/07/2316006.html thanks to DSP Tian

Clear
CLC
img = imread (' 124.jpg '); % Read image from graphics file
[m n T] = size (IMG); % Get pattern size
max = 0;
min = 256;
Avg = 0;
For I =1:1:m
for j = 1:1:n
If IMG (i,j) <min
Min = img (i,j);
End
If IMG (i,j) >max
Max = img (i,j);
End
AVG = AVG +double (img (i, j));
End
End
Avg = uint8 (avg/(m*n));
M
N
T
Max
Min
Avg

How to read and write image files in MATLAB and simple processing of images

The MATLAB image processing Toolbox supports four basic image types: Indexed images, grayscale images, binary images, and RGB images. MATLAB Direct Public image file read the image is an RGB image, it is stored in a three-dimensional array, the three-dimensional array has three faces, followed by Chonghong (Red), green (green), Blue (blue) Three colors, and the data in the polygon is the intensity of the three colors, The elements in the polygon correspond to the pixel points in the image. The resulting matrix is a three-dimensional matrix (256,256,3), A (:,:, 1) represents a 2-dimensional matrix of red color, A (:,:, 2) represents a 2-dimensional matrix of green color, A (:,:, 3) represents a 2-dimensional matrix of blue color.

Imread-Image Read instruction

Imshow-Image Display Instructions

RGB2IND-RGB format image into indexed format

IM2BW-indexed format changed to two-value image format

Ind2gray-index format changed to grayscale format

MATLAB Practice Program (to find the maximum gray level image, minimum gray, average gray)