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Detect color space of loaded image - android OpenCV

Hi I'm developing an Android app using OpenCV for Android. The app allows the user to load or shoot an image, and then performs some manipulations on it. My question is: how can I detect the color-space of the image? I never know whether it's RGB/BGR, or maybe RGBA/BGRA... Is there a way to know? It is crucial because I need to perform a color conversion (to LAB space), and the results will be significantly different depending the original color space of course...