Click here to Skip to main content
12,817,956 members (37,920 online)
Rate this:
Please Sign up or sign in to vote.
See more: C++

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 15-Feb-12 0:55am

1 solution

Rate this: bad
Please Sign up or sign in to vote.

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.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

    Print Answers RSS
Top Experts
Last 24hrsThis month

Advertise | Privacy | Mobile
Web02 | 2.8.170308.1 | Last Updated 15 Feb 2012
Copyright © CodeProject, 1999-2017
All Rights Reserved. Terms of Service
Layout: fixed | fluid

CodeProject, 503-250 Ferrand Drive Toronto Ontario, M3C 3G8 Canada +1 416-849-8900 x 100