Picasa Web Albums has a helpful feature that automatically resize photos to fit your browser, when you view photos on Picasa. “We always display the largest-size photo that’ll fit inside your browser window, up to 1600 pixels if you’ve a nice big display. This resizing happens behind the scenes on Google servers and doesn't require any input from user end. And, the resized photo always preserves the size ratio of the original so it's not distorted, and we don't scale photos to be larger than the original.” Now, Google have made some improvements by doing a little extra processing to improve the look of photos, by adding logic to server processing code that adds appropriate amount of sharpening filters when necessary, before sending it out to the browser. Also reduced the image compression slightly to help preserve the clarity of the fine details in the photos that the sharpening brings out,” writes Google Photo blog.
Resized image: Original Image: Sharpened Image: