Hi,
I fork your module to display images in inline style in background property instead of image tag. I need this to have images which will have width: 100% but fixed height without loose ratio. With this method, it's like we used a scale and crop. If browser width is lesser than image width (example: browser width = 1400px, image width= 1800px), image will always display the same height but only let visible 1400px in width (image will be centered).
We could maintain both of this module separately or try to make cs_adaptive_background_image an option of yours.
Module : https://drupal.org/project/cs_adaptive_background_image
What do you think about this ?