Question

Basically, I have an image which could be large (couple of thousand pixels in both height and width), and can vary quite a bit in width’s and height’s.

What I need to do is display these images at approximately 500 pixels in height and width – but I want to keep the aspect ratio of these intact, so the values would just be fairly close. But I’m a bit confused on what calculations I could use on the original width’s and heights to get them to the right figures.

Any ideas?

Answer 1

Try this:

Size original = new Size(5000,4000);
double ratio = (double)original.Height/original.Width;
int resizePercent = 50;
int newWidth = Convert.ToInt32(original.Width*resizePercent/100);
int newHeight = Convert.ToInt32(newWidth * ratio);
Size resized = new Size(newWidth,newHeight);

Of course simply set original variable to your images size and determine your resize percentage. You could calculate the resize percentage if you had a target width like this:

int targetWidth = 500;
int resizePercent = Convert.ToInt32((double)original.Width/targetWidth);