Surface and contour plots

• Hi again
• %F(u,v)=fft2(rgbIM)
• I have one RGB image and I want to Surface and contour plots of the magnitude F(u,v) , with labeled axes, in hsv colormap
• I writed this way but it didn't work
• anyone can help me ?

f=imread('im.jpg');
f=rgb2hsv(f);
h=fft2(f);
DFT_abs_tmp=log(1+abs(h));
max_DFT_abs = max(max(DFT_abs_tmp));
min_DFT_abs = min(min(DFT_abs_tmp));
DFT_abs_out = 255.*(DFT_abs_tmp - min_DFT_abs.*(ones(size(DFT_abs_tmp))))./(max_DFT_abs -min_DFT_abs);
surfc(DFT_abs_out);
colormap hsv
axis equal;

Answer 1

[Walter Roberson]

f=rgb2hsv(f); is going to give you a 3D array - x, y, and h/s/v. You then fft2() that 3D array and your code obviously expects the result to be a 2D array.

Perhaps you only wanted to work with one of the color planes, such as hue, f(:,:,1) ?

Answer 2

[Paul]

Hello,

I am trying to use this program to detect depth. Is this possible that I can do so with surface and contour plots.