How to change the origin axes in an image

I tried with this:

ax = gca;

ax.Visible = 'On';

set(ax, 'YTickLabel', get(ax, 'YTick')+ py1 + em1/equiv + e/2/equiv);

set(ax, 'XTickLabel', get(ax, 'XTick') + px1+((lm/2)/equiv));

I want to get the blue axes from the red, but when i execute the program it appears: Invalid or deleted object, reffering to ax.

I want to plot some data respect from the blue exes.

Answer 1

[Hrishikesh Borate]

Hi,

It’s my understanding that you are trying to change the origin axes in an image. Following is the code for the same:-

I = imread('cameraman.tif');
shiftX = -200;
shiftY = -150;
imshow(I,'Xdata',[1 size(I,1)]+shiftX,'Ydata',[1 size(I,2)]+shiftY)
ax = gca;
ax.Visible = 'On';
hold on
% Indication that the origin has shifted.
plot(0, 0, 'r+', 'MarkerSize', 30, 'LineWidth', 2)
hold off 

For more information refer to imshow.