hi..i am writing the code for recursive mean separate histogram equalization..i am getting an error called "Undefined function 'averpixcal' for input arguments of type 'double'."when calling the function 'averpixcal'..code is attached for reference

2014 2 13
2 个回答
更新时间：2019 8 16
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//----main module-----// PicOri=imread('C:\Users\Public\Pictures\Sample Pictures\image14.jpg'); % if isgray(PicOri)==0 PicGray=rgb2gray(PicOri); % else % PicGray=PicOri; % end figure(1),imshow(PicGray),title('Ô­»Ò¶ÈͼÏñ');
h=imhist(PicGray); % figure(2),plot(h),title('ԭͼÏñÖ±·½Í¼');
[m,n]=size(PicGray); PicHEt=zeros(m,n);
max = double(max(PicGray(:))); min = double(min(PicGray(:)));
r=1; length=2^r; Xm=zeros(1,length); Xm(1)=max+1; Xm(2)=min+1;
for i=1:r for j=1:2^(i-1) Xm(2^(i-1)+j+1)= averpixcal(h,Xm(2^(i-1)-j+2),Xm(2^(i-1)-j+1)); end Xm=sort(Xm,'descend'); end Xm=sort(Xm);
for i=2:2^r [row,col]=find((PicGray>=Xm(i-1)-1)&(PicGray<=Xm(i)-2)); PicHEt=FuncHE(PicGray,PicHEt,row,col,h,Xm(i-1)-1,Xm(i)-2,m,n); end [row,col]=find((PicGray>=Xm(2^r)-1)&(PicGray<=Xm(2^r+1)-1)); PicHEt=FuncHE(PicGray,PicHEt,row,col,h,Xm(2^r)-1,Xm(2^r+1)-1,m,n);
PicHE=uint8(PicHEt); h1=imhist(PicHE); figure(3),imshow(PicHE),title('¾ùºâºóµÄͼÏñ'); figure(4),plot(h1),title('¾ùºâºóµÄÖ±·½Í¼'); ---------------------------------------------------------------------------------
//---function averpixcal----// function Xm=averpixcal(h,begin,ending)
PixSum=0; Sum=0; for i=begin:ending PixSum=(i-1)*h(i)+PixSum; Sum=h(i)+Sum; end Xm= double(round(PixSum/Sum)) -----------------------------------------------------------------------------------
//-----function to find the histogram equalization-------// function PicHEt=FuncHE(PicGray,PicHEt,row,col,h,min,max,m,n)
pix=size(col,1);
%PZ=zeros(1,Xm(2)-1); PZ=zeros(1,max-min+1);
for i=min+1:max+1 PZ(i-min)=h(i)/pix; end
%S=zeros(1,Xm(2)-1); S=zeros(1,max+1);
S(min+1)=PZ(1); for i=min+2:max+1 S(i)=PZ(i-min)+S(i-1); end
FuncHE=min+(max-min)*S;
for k=1:pix PicHEt(row(k),col(k))=floor(FuncHE(PicGray(row(k),col(k))+1)); end

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回答（2 个）

Mischa Kim
Mischa Kim 2014-2-13
编辑：Mischa Kim 2014-2-13

1 个投票

Vishwas, a couple of thoughts:
  • Comments in MATLAB appear after percent symbols. E.g., % This is a comment
  • Is the code you show contained within one function file? Make sure that the functions are in the MATLAB path using the which command in the MATLAB prompt:
>> which averpixcal % in case the function is located in a separate function file
  • Please edit your question for better readability.

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vishwas h s
vishwas h s 2014-2-13
hi kim... 1)the three functions are located in three different files.. 2)then the instructions after the comment symbol are intentionally added to check for the correctness of the code...the are not needed in the code...
Mischa Kim
Mischa Kim 2014-2-13
编辑：Mischa Kim 2014-2-13
OK. Then I suggest that you move all function files into the same folder and then make this folder the current MATLAB folder:
Suraj Kamya
Suraj Kamya 2014-4-16
Hi, Check out the attached files, Now code is perfectly running. Simply Run reswhe_test.m and select any image. Enjoy! :)
Regards, Suraj Kamya <mailto:kamyasuraj@yahoo.com kamyasuraj@yahoo.com>

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