I know that there are technical limitations to maintaining sharpness when reducing image size to very small.
For example taking an image from 1000X100 to 200x20. Naturally due to the small number of pixels to play with it's inevitable that it's impossible to maintain smooth curves/definition as there just isn't enough resolution to play with.
Having said that - can anyone suggest the optimal way to reduce image size but maintain the maximum possible sharpness?
1, For JPG
2. For PNG
3. AI and ESP files (going from a vector image to a small raster image for website use)
Any guidance gratefully appreciated.