I am new to both camera2 and openGLES. I want to apply a shader over camera preview obtained by camera2 api which can convert preview in black and white. I believe grey scale filter is what will help here. Can anyone suggest any demo application which i can refer to for this requirement ?
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May [this](https://stackoverflow.com/questions/8371055/apply-custom-filters-to-camera-output) can help you. – Sanjay Kakadiya May 08 '18 at 04:35