c# - How calculate aspect ratio from dimensions of image - Stack Overflow

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I am using Jcrop for cropping image so i want to calculate ratio of height and width of image but problem is that there is no limit of maximum height and width.

when user upload image then i want to get height,width ratio so on cropping it should be crop with respect to aspect ratio for example

Width=835, Height=625 aspect ratio would be 167: 125

i have calculated this ratio from following link Aspect ratio calculator

I don't want to cacalute new height,width. I just want to calculate ratio 167: 125

How can i do this?

I am using Jcrop for cropping image so i want to calculate ratio of height and width of image but problem is that there is no limit of maximum height and width.

when user upload image then i want to get height,width ratio so on cropping it should be crop with respect to aspect ratio for example

Width=835, Height=625 aspect ratio would be 167: 125

i have calculated this ratio from following link Aspect ratio calculator

I don't want to cacalute new height,width. I just want to calculate ratio 167: 125

How can i do this?

• c#
• javascript
• image
• aspect-ratio

Share Improve this question Follow edited Jun 19, 2013 at 7:39 Shoaib Ijaz asked Jun 17, 2013 at 17:32 Shoaib IjazShoaib Ijaz 5,6071212 gold badges6262 silver badges8888 bronze badges 3

• 1 Possible duplicate Calculate a Ratio in C# – Dustin Kingen Commented Jun 17, 2013 at 17:38
• not sure where you got 107:90. I put those numbers into that site and got 167:125. Regardless, just follow the math on the site you linked and you'll be able to get any image ratio. – musicmunky Commented Jun 17, 2013 at 17:47
• yes i have correct the ratio 167: 125 – Shoaib Ijaz Commented Jun 19, 2013 at 7:39

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1 Answer 1

Sorted by: Reset to default 7

I think you are looking for HCF (Highest Common Factor) but the ratio (Width:835,Height:625) will be 167:125. Here is the function by which you can calculate HCF between 2 numbers.

 private int FindHCF(int m, int n)
 {
     int temp, remainder;
     if (m < n)
     {
         temp = m;
         m = n;
         n = temp;
     }
     while (true)
     {
         remainder = m % n;
         if (remainder == 0)
             return n;
         else
             m = n;
         n = remainder;
     }
 }

So here is the rest of the code

int hcf = FindHcf(835, 625);
int factorW = 835 / hcf;
int factorH = 625 / hcf;

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