Google developing and testing a new image format WebP for to improve the website loading speeds.Today they announced that they updated their algorithm and also released some pictures in WebP format which are better than JPEG and also lesser size when compared to JPEG.
The WebP images are more than 30% smaller than the JPEG ones.Here are the images released by Google.
How WebP Works?
WebP uses predictive coding to encode an image, the same methodology used by the VP8 video codec to compress keyframes in videos. Predictive coding uses the values in neighboring blocks of pixels to predict the values in a block, and then encodes only the difference (residual) between the actual values and the prediction.
The residuals typically contain many zero values, which can be compressed much more effectively. The residuals are then transformed, quantized and entropy-coded as usual. WebP also uses variable block sizes.
from official Google’s WebP project page.
But the problem with WebP format is they are still in development stage.Right now Google Chrome and Opera supports these WebP formats.