ColorTag is a powerful API for color detection. Taking an image file (or URL) as input ColorTag produces a list of text labels and hex RGB values that can be then used as tags for a certain image or item. The API can sort tags by relevance (recognizing colors of objects on the pictures, e.g. a dress, a car, etc.) or simply by weight in the image. First mode is perfect for e-commerce applications, allowing to automatically tag items with colors by simply providing a photo or a thumbnail and build a color tag cloud, so users are able to search items by color (e.g. red). Weight sorting mode can be useful for photos, wallpapers or other images without well-defined objects on them to analyze the palette in general. Text color labels can be assigned with different precision (just basic colors, W3C-compatible colors, precise colors, etc.).

Use Cases

ColorTag API can perform color segmentation and histogram analysis to provide descriptive color statistics for an image. It can be useful color-processing utility in the following cases:

• Tag items with the appropriate color derived from a photo or a thumbnail
• Build color tag clouds to allow searching by color
• Evaluate a picture and find dominant colors in it
• Validate images (e.g. to filter images by determining their primary color or a set of specified colors)
• Find exact color names (e.g. azure, crimson, khaki or indigo)
• Determine image’s perceptually dominant color and find complementary colors using services like Adobe Kuler or Colour Lovers
• Everything else you can come up with :)

Demo

Online demo is available at http://www.apicloud.me/apis/colortag/demo/

Feel free to test the API as much as you like!

Documentation

The most recent and complete API documentation is always available at http://www.apicloud.me/apis/colortag/docs/