CODEWITHSUNDEEP
imagemath
Soundz
Soundz

Reputation: 1300

Image resizing with fixed width but dynamic height

Hi guys I'm cracking my head on this.

I have a couple of pics, all with different ration (1288x1977, 1044x1789 e.g).

What I'm trying to do now is to resize the original up to 2 smaller imagines with fixed widths(640 & 1024), but dynamical(percent based i guess) heights, so an original with 1047x1501 would devide into: 1024x1468 and 640x917, those are the expected results but i can't wrapp my head arround the maths to do this. I hope you can help.

Upvotes: 1

Views: 124

Answers (1)

500 - Internal Server Error
500 - Internal Server Error

Reputation: 28839

So you want to derive the height from a desired width while maintaining the aspect ratio?

That's math, actually, rather than programming:

Aspect = orig_width / orig_height

Aspect = new_width / new_height

so

orig_width / orig_height = new_width / new_height

so

new_height * (orig_width / orig_height) = new_width

so

new_height = new_width / (orig_width / orig_height)

Upvotes: 4

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