matlab函数大全matlb函数大全.docVIP

图像处理和图像识别中常用的matlab函数 2012年03月28日 星期三 9:42 下面仅给出函数的大概意思，详细用法见： help 函数名 或 matlab help 1、imread：read image from graphics file；2、imshow：display image in Handle Graphics figure；3、imwrite：write image to graphics file；4、rgb2gray：convert RGB image or colormap to grayscale；5、im2bw：convert image to binary image, based on threshold；6、exist：check existence of variable, function, directory, or class；7、size：size of array，用此函数可以获得图像的高和宽；8、min：smallest elements in array；9、max：largest elements in array；10、fprintf：write data to text file；将信息显示到屏幕上或将数据写到指定的文件中；11、conv2：two dimensional convolution；二维卷积(图像滤波)；12、ones(m, n)：create array of all ones；13、zeros(m, n)：create array of all zeros；14、interp2：2-D data interpolation；二维插值(图像插值)，多和meshgrid一起用；15、meshgrid：generate X and Y arrays for 3-D plots；用于产生网格，将向量区域转换成矩阵；16、clf：clear current figure window；清除当前的图像，图像窗口仍存在；17、pause：halt execution temporarily；暂停；18、figure：create figure graphics object；19、pinv：Moore-Penrose pseudoinverse of matrix；求矩阵的伪逆；20、hold on：holds the current plot and all axis properties so that subsequent graphingcommands add to the existing graph；21、hold off：returns to the default mode whereby PLOT commands erase the previousplots and reset all axis properties before drawing new plots；22、error：display message and abort function；23、isempty：determine whether array is empty；24、close：remove specified figure；25、repmat：replicate and tile an array；26、find：find indices and values of nonzero elements；27、cell：construct cell array；28、atan2： four quadrant inverse tangent；29、prod：product(乘积) of array elements，对于向量返回的是其所有元素的积、对于矩阵返回的是按列向量的所有元素的积，然后组成 一行向量；30、abs：absolute value and complex magnitude；31、disp：Display text or array；32、clear：remove items from workspace, freeing up system memory；33、clc：clear command window；34、delete：delete file or graphics object；35、diary：save text of MATLAB session(a copy of all subsequent command window input and most of the resulting command window output to be appended