Step function with a slanted edge

2017 7 23
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更新时间：2017 7 24
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Hi,
I want to write a code for a step function with its edge slanted at a small angle. I could write a code for simple step function but I want to give an angle to its edge. In addition to that, I want to give pixel value to my step function to be 100x100. How can I do that?
function out = step_1(x)
out = 0 * x;
out(find(x==0))=0.5;
out(find(x>0)) = 1;
end

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回答（1 个）

Image Analyst
Image Analyst 2017-7-23

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Swati Jain
Swati Jain 2017-7-23
Thanks for your response. I tried it and code is attached;
fs=500; %Sampling Frequency
x=-5:1/fs:5;
y=x;
[X,Y]=meshgrid(x,y);
f = step_1(x);
figure(1)
stem(x, f);
axis([-5 5 -1 2]);
figure(2)
plot(x,f, 'r');
axis([-5 5 0 1]);
title('Step Funtion');
xlabel('Distance');
ylabel('Amplitude');
figure(3)
imagesc(f);
xlabel('x (m)');
ylabel('Amplitude');
colormap('gray');
axis square;
axis xy;
tform = affine2d([1 0 0; .5 1 0; 0 0 1]);
J = imwarp(f,tform);
figure;
imshow(J)
but, I got the following error:
Warning: Image is too big to fit on screen; displaying at 33% > In images.internal.initSize (line 71) In imshow (line 328) In step_1_2 (line 29) Also, How can I set the pixel value of my image?
Image Analyst
Image Analyst 2017-7-23
That's just a notice. You can ignore it. See attached demo for more info on how to zoom.
Image Analyst
Image Analyst 2017-7-24
Yes, warnings are in orange text, and real errors are in red text.

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