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Hi,
 
I have very large rectangle filled with an image and displayed in a small area maintaining aspect ratio of large rectangle. Now i have selected an area in rectangle dimension from the image. Now i need to convert the selected rectangle to large rectangle dimension.
 
Please find a solution for this???
 
Thanks in advance.
Posted 14-Feb-12 23:55pm

1 solution

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Solution 1

Convert each point using the formula:
  X = X0 + (x-x0) * (X1-X0)/(x1-x0); 
  Y = Y0 + (y-y0) * (Y1-Y0)/(x1-x0);
 
where p0={x0,y0}, p1={x1,y1} are 'opposite edges', for instance, top-left and bottom-right points of the smaller rectagle and P0={X0,Y0}, P1={X1,Y1} are the analogous points of the larger one.
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