How to make progressive images

Download - jpegtran from here - http://jpegclub.org/jpegtran/

Usage: jpegtran.exe [switches] inputfile outputfile
Example:  jpegtran -progressive -optimize -copy none slideImage2.jpg slideImage2_optimized.jpg

User experience example - Check the video on this url -
http://blog.patrickmeenan.com/2013/06/progressive-jpegs-ftw.html

Other urls -
http://www.yuiblog.com/blog/2008/12/05/imageopt-4/
http://blog.patrickmeenan.com/2013/06/progressive-jpegs-ftw.html
http://www.webhostinghero.com/improve-website-load-times-using-progressive-jpegs/