Argument to dynamic structure reference must evaluate to a valid field name.
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Argument to dynamic structure reference must
evaluate to a valid field name.
Error in godmake (line 43)
r=2/pi*(atan(c.(sqrt(((Ixx-Iyy).^2+4*Ixy.^2)/(Ix.^2+Iy.^2)))));
I m getting error in this.how to rectify this error?
my code is:
clc;
myFolder = 'G:\pro\aluminium_foil';
filePattern = fullfile(myFolder, '*.png');
jpegFiles = dir(filePattern);
sigma=2;
for k = 1:length(jpegFiles)
baseFileName = jpegFiles(k).name;
fullFileName = fullfile(myFolder, baseFileName);
%fprintf(1, 'Now reading %s\n', fullFileName);
I = imread(fullFileName);
end
for s=1:length(sigma)
sigma = sigma(s);
Wx = floor(3*sigma);
x = [-Wx:Wx];
[xx,yy] = meshgrid(x,x);
g0 = -exp(-(xx.^2+yy.^2)/(2*sigma^2))/(2*pi*sigma^4);
F{s}.Gx = xx.*g0;
F{s}.Gy = yy.*g0;
F{s}.Gxx = (1-xx.^2/sigma^2).*g0;
F{s}.Gxy = -(xx.*yy/sigma^2).*g0;
F{s}.Gyy = (1-yy.^2/sigma^2).*g0;
sij = sigma;
Ix = sij*imfilter(I,F{s}.Gx ,'same', 'replicate');
Iy = sij*imfilter(I, F{s}.Gy, 'same', 'replicate');
Ixx = sij^2*imfilter(I, F{s}.Gxx, 'same', 'replicate');
Ixy = sij^2*imfilter(I, F{s}.Gxy, 'same', 'replicate');
Iyy = sij^2*imfilter(I, F{s}.Gyy, 'same', 'replicate');
Ix=double(Ix);
Iy=double(Iy);
Ixx=double(Ixx);
Ixy=double(Ixy);
Iyy=double(Iyy);
g = sqrt(Ix.*Ix + Iy.*Iy);
figure,imshow(g),title('g')
d = sqrt( (Ixx-Iyy).^2+ 4*Ixy.^2 );
figure,imshow(d),title('d')
SI = 0.5-1/pi*atan((-Ixx-Iyy)./sqrt((Ixx-Iyy).^2+ 4*Ixy.^2));
figure,imshow(SI),title('SI')
r=2/pi*(atan(c.(sqrt(((Ixx-Iyy).^2+4*Ixy.^2)/(Ix.^2+Iy.^2)))));
figure,imshow(r),title('r')
end
thanks in advance
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KSSV
2018-9-18
Replace that line by:
r=2/pi*(atan(c*(sqrt(((Ixx-Iyy).^2+4*Ixy.^2)/(Ix.^2+Iy.^2)))));
There is a typo error...instead of *, . has appeared, so MATLAB expecting c a structure.
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