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Draw a line with matlab

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oscillator
oscillator 2022-2-21
回答： Image Analyst 2022-2-21
Hi, out of personal interest I want to draw a single white line in a black background of 300x200 pixels using matlab.
How do I accomplish that?
could someone at least tell me wich functions I should use?
Thank you for your time
  2 个评论
Jan
Jan 2022-2-21
Do you want to draw a line in a figure on the screen, or create a matrix to be saved in a file? Do you want some anti-aliasing or just black and white pixels?
oscillator
oscillator 2022-2-21
I want a matrix in order to use imshow and see the picture in figure(1). Just black and white pixels, nothing complicated

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回答（1 个）

Image Analyst
Image Analyst 2022-2-21
If the row is to be in a certain row, you can do
imageArray(row, column1:column2) = 255;
If the row is to be in a certain column, you can do
imageArray(row1:row2, column) = 255;
If you want a line to go from one point to another (at an angle), you can use linspace():
xLine = round(linspace(x1, x2, 1000));
yLine = round(linspace(y1, y2, 1000));
for k = 1 : length(xLine)
imageArray(yLine(k), xLine(k)) = 255;
end

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