Hi when I reduce the size of the pictures in pixels to 80 * 80 do not wait the same quality how I solve this problem
It depends. What software are you using to resize it?
You’ll typically want to use an interpolation (or “resampling”) algorithm, such as bicubic. Some software offers a “bicubic sharper” algorithm that is fine-tuned for reducing the size of images.
If you need perfect quality, your best bet is to redesign the thumbnail from scratch or use vectors.
Give your software a quick Google search, e.g. “resampling in photoshop” and you should find your answer.
Thank you bro