how to sharpen an image code example

Example 1: css image sharpen

img {
  image-rendering: auto;
  image-rendering: crisp-edges;
  image-rendering: pixelated;
}

Example 2: css image sharpen

filter: none; 
-webkit-filter: blur(0px); 
-moz-filter: blur(0px); 
-ms-filter: blur(0px);
filter:progid:DXImageTransform.Microsoft.Blur(PixelRadius='0');