what is 3d plot?

Can anybody help me on how to smooth out edges to make it rounded and fair? i am using MATLAB and i am quite new to this. Thank you.

[Walter Roberson]

Which edges?

[Cas Cas]

What did you use to plot? If you used surf, try this

surf(peaks)
shading interp

[Walter Roberson]

What is it that you have available to be plotted? Are you working with a rectangular array of data, or do you have a function that you can evaluate to determine additional data points?

[Rena Berman]

(Answers Dev) Restored question.

Answer 1

[Image Analyst]

You can blur the whole thing with

blurredImage = conv2(data, ones(15), 'same');

If you want to blur just the edges and leave the rest as-is, first blur the whole thing, then find the edges in the original image and replace them with the blurred version. Something like (untested):

blurredImage = conv2(data, ones(15), 'same');
stdImage = stdfilt(data, ones(9));
edgeImage = stdImage > 5; % Whatever value works.
output = data; % Initialize
% Now replace edge pixels with blurred ones.
output(edgeImage) = blurredImage(edgeImage);

[Rey Kelvin Peralta]

Why blur sir?? i want to smoothen the edges to generate the 3d model. these are the codes i used:

y = rgb2gray(imresize(imread('G_0003.jpg'),.2));
z = 255.0 - 1.0 * double(y);
z = z ./5;
surface(z);

This is also the image: http://pasteboard.co/2frG8Ll9.jpg

[Rey Kelvin Peralta]

also how do i see the output of the blur sir?? i did what you said but i dont know how to see the result of it

[Image Analyst]

Why blur? Because blurring smooths the image.

Do you want to smooth the edges only , or smooth everything?

To view the image, which I called output, use [] with imshow

imshow(output, []);

Also, you might try a Fourier filter to get rid of that grid pattern first.

[Rey Kelvin Peralta]

So i should blurr first so that it'll be smooth? and get rid of the jagged edges? is there any other way to smoothen out the round edges sir?

[Rey Kelvin Peralta]

i want to smooth the model itself sir. And also afterwards is there a way to export it to blender?

[Rey Kelvin Peralta]

1 more thing sir. if i blurr doesnt it remove the details of the image? i want to preserve the shape of the image. thank you

[Walter Roberson]

I think the blur should be

blurredImage = conv2(data, ones(15)/(15*15), 'same');

This would be a moving average blur; without the division by 15*15 you would be doing a moving sum rather than a moving average

[Rey Kelvin Peralta]

i tried using blurr but it just blurred the image. it doesnt show the model anymore. i just need to smoothen the edges of the center piece. to show its 3d model. I just need the embossed part be smoothed out so it can show the model clean

[Image Analyst]

Thanks Walter for the correction. It DOES smooth it, Rey. If you don't notice it then either the window width of 15 is not large enough, or else you're not displaying the right image. You should notice a definite reduction in noise with displaying it with either imshow() or surf().

[Rey Kelvin Peralta]

when you did it sir, did it smoothen the center piece? can you show me please? thanks you

[Walter Roberson]

The following discussion refers to the original image, not reduced to .2 of original size. The 2800+ by 4800+ image.

Try using

blurredImage = conv2(data,ones(75,75)./(75*75),'same');
surf(blurredImage, 'edgecolor', 'none')

You might need to play slightly with the 75 to get the best result, but it is more than 70 and less than 80, something pretty close to 75. Maybe 73.

The more obvious texture is approximately 74 pixels apart with a width of about 23 pixels, but there is also a 5-division submesh within each larger square, so roughly every 10 pixels. It appears the coin has been photographed through the mesh, which makes it important to remove the mesh first. I do not know the best way to remove a texture.