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I would need an app that will use the phone camera and once the user touch the touch screen it would display the color name as text. e.g. if we are looking at bowl of milk with the camera at touching with the finger on the milk itself it would display somewhere on the screen "White".
the color definition should be based on some predefined reference table that can be edited.
Ideally it should be done without the need to take a photo but it technically its cant be done or due to much higher cost than please provide both options.