Dimensionality Reduction of Hyperspectral Image

Question

Fodio Longman 2017-10-17

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/361790-dimensionality-reduction-of-hyperspectral-image

I have a hyperspectral dataset with the following dimensions. [21527 776 224]. i tried to read it into matlab using the multibandread function but i ran into memory issues. My code is this: close all; clear all clc

%%Real Dataset Test PRECISION='int16'; OFFSET=0; INTERLEAVE='bip'; BYTEORDER='ieee-be';

 FILENAME_REF=('C:\Users\uos\Desktop\GPC\Images\data');
 %INFO_HDR=('C:\Users\uos\Desktop\GPC\Images\header1.hdr');

% datafile=('C:\Users\uos\Desktop\GPC\Images\data'); % info=('C:\Users\uos\Desktop\GPC\Images\header.hdr'); % D=envidataread(datafile,info);

SIZE_REF=[21527, 776, 224];

I_REF=multibandread(FILENAME_REF,SIZE_REF,PRECISION,OFFSET,INTERLEAVE,BYTEORDER); the error i get is : Error using zeros Requested 224x776x21527 (27.9GB) array exceeds maximum array size preference. Creation of arrays greater than this limit may take a long time and cause MATLAB to become unresponsive. See array size limit or preference panel for more information.

Error in multibandread>readDiskFile (line 212) im = zeros(outputSize(1), outputSize(2), outputSize(3), info.outputClass);

Error in multibandread (line 148) im = readDiskFile(filename, info, ndx, readOrder); Please can you suggest or direct me towards a solution? many thanks