why this code is not working?

2018 4 17
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更新时间：2018 4 19
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0 个投票

i have code which is perfectly working fine with cameraman.tif but with other images its not ..what is wrong in the code?
[X,Y,Z] = peaks(200);
I = double(imread('cameraman.tif'));
figure;
mesh(X, Y, Z, I);
colormap jet;
above one is working fine
but this one not .i have to generate surf and mesh images kindly suggest what is wrong
clc
close all
clear all
% a=VideoReader('C:\Users\tce21\Downloads\test.mp4'); % Read a video
% b = read(a,1); % Read 1st frame
% c=rgb2gray(b);
% [X,Y,Z] = peaks(200); % surface
I = double(c);
figure;
mesh(X, Y, Z, I); % overlay image as texture
colormap jet;
image s attached
i want same output as cameraman but with mesh grid lines with the figure attached
as 1st images.
help is really appreciated

4 个评论
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ramya
ramya 2018-4-19
no replies yet
KSSV
KSSV 2018-4-19
编辑：KSSV 2018-4-19
Because question is vague.....you asked how to make a mesh of image almost thrice.....those questions itself were not clear and you have not accepted the answers so far nor the discussion is closed. This question too is almost the same. It is not clear what you are trying to do and what error you have....:|
Image Analyst
Image Analyst 2018-4-19
This:
[X,Y,Z] = peaks(200);
I = double(imread('cameraman.tif'));
figure;
mesh(X, Y, Z, I);
colormap jet;
does not work fine. It generates error
Warning: Error creating or updating Surface
Error in value of property CData
Array is wrong shape or size
At that point, I quit working on this question.
KSSV
KSSV 2018-4-19
Yes....true Image Analyst. There were two or three questions on how to mesh a image by the user which were not closed by the user so far.

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 采纳的回答

Image Analyst
Image Analyst 2018-4-19

0 个投票

Try this:

rgbImage = imread('1st images.bmp');
subplot(1, 2, 1);
imshow(rgbImage);
% Get the dimensions of the image.  
% numberOfColorChannels should be = 1 for a gray scale image, and 3 for an RGB color image.
[rows, columns, numberOfColorChannels] = size(rgbImage);
if numberOfColorChannels > 1
	% It's not really gray scale like we expected - it's color.
	% Use weighted sum of ALL channels to create a gray scale image.
	rgbImage = rgb2gray(rgbImage); 
	% ALTERNATE METHOD: Convert it to gray scale by taking only the green channel,
	% which in a typical snapshot will be the least noisy channel.
	% grayImage = grayImage(:, :, 2); % Take green channel.
end
% Make white surround black.
rgbImage(rgbImage == 255) = 0;
[X, Y] = meshgrid(1:columns, 1:rows);
dblImage = double(rgbImage); 
Z = dblImage;
subplot(1, 2, 2);
mesh(X, Y, Z, dblImage); % overlay image as texture
colormap jet;
fontSize = 20;
xlabel('X, column', 'FontSize', fontSize);
ylabel('Y, Row', 'FontSize', fontSize);
zlabel('Intensity', 'FontSize', fontSize);

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