Dominant Colors Lazy Loading

This plugin allows you to lazy load your images while showing the dominant color of each image as a placeholder – like Pinterest or Google Images. It also enables you to use tiny thumbnails as placeholders. If you want to know how it works read the article Dominant Colors for Lazy-Loading Images, where I explain the general concept.

To ensure the quality of the plugin please let me know if you encounter any issues. I will reply swiftly and fix them as soon as possible!

Features

• The plugin calculates the dominant color of an image upon upload.
• All images attached to posts and pages are automatically replaced with placeholders and load as soon as they enter the viewport to save bandwidth.
• Galleries added via the default [gallery] shortcode are also replaced and loaded as soon as they appear in the viewport.
• A custom filter for lazy-loading thumbnails or featured images can be used in templates and themes (apply_filters( 'dominant_colors', $image, $id )).
• Dominant colors can be calculated for all existing attachments in the plugin settings.
  • This has already been tested with thousands of images.
  • Until the calculation is done you can specify a fallback color for your placeholders.
  • All files that can’t be processed are listed during calculation and link to the particular attachment in the media library.
• You can choose between GIF and SVG placeholders.
  • SVG placeholders have the same pixel size and aspect ratio as the original images, instead of being a single square pixel. This way responsive images do not need a wrapper for preserving the original aspect ratio.
  • GIF placeholders are small and have great browser compatibility. They also enable you to use tiny thumbnails as described on manu.ninja for your images.
  • You can set the resolution of tiny thumbnails to 3×3 pixels (120 bytes), 4×4 pixels (128 bytes) or 5×5 pixels (204 bytes).
• The plugin is compatible with RICG Responsive Images, which has been added to WordPress 4.4 as default functionality.

Demo

You can see the plugin live at http://www.karriere.at/blog/.