How to resize a picture to a specific file size?

Question

I would like to resize a picture to a specific file size. For example, no more than 200KB. What is the best approach to achieve this with C# .NET ?

Thanks !

Answer 1

A rough estimate is as follows:

size(KB) = (width * height * bitdepth) / (8 * 1024)

The file size is inflated a bit more due to file information (compression info, etc).