http://drupal.org/project/adaptive_image
The Adaptive image module provides device-appropriate versions of images from your fields. You can activate adaptive images by adding an adaptive effect to any of your image styles.
The used technique is derived from http://adaptive-images.com/ by Matt Wilcox. The hard work is done by Drupal core no need for any additional rewrites. If image styles work on your website, this module will too.
Drupal 7.x
JavaScript enabled
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To install the module copy the 'adaptive_image' folder to your sites/all/modules directory.
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Read more about installing modules at http://drupal.org/node/70151
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Go to admin/config/media/image-styles Edit an existing or add a new style. Add the Adaptive image effect. Click on 'Update style' button.
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Go to admin/structure/types Click on "manage display". Choose a "image" field and click on the edit button. Choose the previously updated style as image style. Click on "Update".
- Go to the module issue queue at http://drupal.org/project/issues/adaptive_image?status=All&categories=All
- Click on CREATE A NEW ISSUE link.
- Fill the form.
- To get a status report on your request go to http://drupal.org/project/issues/user
Read more at http://drupal.org/node/250790