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Applying colorfilter in QML, of QT

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Hi, I would loke to apply predefined or custom color filter on my QML application like : change Image RGB Level saturation Hue … Ideally I would like to lower the “light” level off all the display unless the pixel Saturation is higher than XXX. This for simulating a lowering of the Ambient light without changing the part of the picture which represent Lights,LED, and all light producing element. The following snapshot represent a LED with and without the EFFECT. BUT I would like the lit LED to be brigher: I know I will probably not find directly this filter, but a generic filter mechanism would really help. Does anyone know about such a filter??

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