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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. Check out visual demo here: http://apicloud.me/apis/colortag/demo/. The API can sort tags by relevance (detecting colors of objects on the image, 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.).
Red Buffer Imaging API provides a simple solution to resize your images in no time by simply providing parameters of url to picture, new width, new height to the API end point and telling it where to save the new photo with your desired name. With a simple call to this API, the hassle to resize image in your code is made simpler and quicker. An example to resize your photo using curl is : curl --data "url=http://dopa.mn/images/gabe-zichermann-2011-400x400-02.jpg&width=100&height=100" -H 'X-Mashape-Key: HauGMXlww8mshshEBY4eewckDY3vp14XXXXjsXXzrpqdYDdJkm' -X GET https://redbuffer-imaging-v1.p.mashape.com/imaging >resized_photo.jpg