My code is showing error " matrix dimension must agree".In line no -4 (2nd function:function [res_img]=Gray_trans_S_curve_uint16(xyz))-nrm_val= (xyz)- mn1;.output of the 1st function will be used in 2nd function.1st fn :function Res=Local_Process_uin

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Milan Singh 2018-6-10

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https://ww2.mathworks.cn/matlabcentral/answers/404938-my-code-is-showing-error-matrix-dimension-must-agree-in-line-no-4-2nd-function-function-res_im

评论： Milan Singh 2018-6-12

function Res=Local_Process_uint16_mymod(inputImage,nblockrow,nblockcolumn) [m,n] = size(inputImage); dcol = fix(n/nblockcolumn); drow = fix(m/nblockrow); for index = 1:nblockrow* nblockcolumn

    [r,c] = ind2sub([nblockrow,nblockcolumn],indexa );
    if (r==nblockrow && c~=nblockcolumn)
        subimage = inputImage((r-1)*drow+1:r*drow+rem(m,nblockrow), (c-1)*dcol+1:c*dcol,:);
    elseif (r~=nblockrow && c==nblockcolumn)   
        subimage = inputImage((r-1)*drow+1:r*drow, (c-1)*dcol+1:c*dcol+rem(n,nblockcolumn),:);
    elseif (r==nblockrow && c==nblockcolumn)
        subimage = inputImage((r-1)*drow+1:r*drow+rem(m,nblockrow), (c-1)*dcol+1:c*dcol+rem(n,nblockcolumn),:);
    else
        subimage = inputImage((r-1)*drow+1:r*drow, (c-1)*dcol+1:c*dcol,:);
    end;
    subimage;
    test_th=Gray_trans_S_curve_uint16(double(subimage));
    Box_new{r,c}=test_th;
    subimage=[];

end

Res=cell2mat(Box_new); % figure,imshow(Res,[]); % 2nd function

function [res_img]=Gray_trans_S_curve_uint16(xyz) mn1 = min(xyz(:)); mx1=max(xyz(:)); mxl nrm_val= (xyz)- mn1; diff = (mx1-mn1); res=[]; res_img=[]; xyz_norm = nrm_val ./ diff;

[m,n]=size(xyz_norm);

for i=1:m for j=1:n res(i,j)=(0.9642)+((8.594*10^-4-0.9642)/(1+exp((xyz_norm(i,j)-0.4969)/0.07598))); end; end;

res_img=uint16(((mx1-mn1)*res)+mn1);

%endThe attached file contains contrast enhancement code. function Res=Local_Process_uint16_mymod(inputImage,nblockrow,nblockcolumn) will take input as image and size of blocks of subimage.Output of the image will be sed in another function name:function [res_img]=Gray_trans_S_curve_uint16(xyz). but it is showing error. example:function Res=Local_Process_uint16_mymod('mrimage.bmp',40,40) objective: The function function Res=Local_Process_uint16_mymod(inputImage,nblockrow,nblockcolumn) will take input image and divide the image into non overlapping blocks. after that each block will be given as input to the function [res_img]=Gray_trans_S_curve_uint16(xyz) to perform contrast enhancement. but in line no 4 it is showing error Marix dimenson must agree.%

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Majid Farzaneh 2018-6-10

َAnother problem is that you didn't return Res value in the function 'Local_Process_uint16_mymod' You should assign output to Res variable.

Milan Singh 2018-6-10

@Majid Farzaneh I have send another file. Please tell me what input you are taikng in command window.

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采纳的回答

Majid Farzaneh 2018-6-10

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https://ww2.mathworks.cn/matlabcentral/answers/404938-my-code-is-showing-error-matrix-dimension-must-agree-in-line-no-4-2nd-function-function-res_im#answer_324030

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If your input is an image it's incorrect to use it like this:

Res=Local_Process_uint16_mymod('mrimage.bmp',40,40)

'mrimage.bmp' is a string not an image. You should first read the image:

I=imread('mrimage.bmp');
Res=Local_Process_uint16_mymod(I,40,40)

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Majid Farzaneh 2018-6-11

By the way you can also use histeq() and adapthisteq() functions for contrast enhancement. note that the input must be 2-D.

Good luck!

Milan Singh 2018-6-12

thank you Majid_

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