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Editorial Team
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Asked: 2026-05-25T23:07:58+00:00

Using an Android (2.3.3) phone, I can use the camera to retrieve a preview

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Using an Android (2.3.3) phone, I can use the camera to retrieve a preview with the onPreviewFrame(byte[] data, Camera camera) method to get the YUV image.

For some image processing, I need to convert this data to an RGB image and show it on the device. Using the basic java / android method, this runs at a horrible rate of less then 5 fps…

Now, using the NDK, I want to speed things up. The problem is: How do I convert the YUV array to an RGB array in C? And is there a way to display it (using OpenGL perhaps?) in the native code? Real-time should be possible (the Qualcomm AR demos showed us that).

I cannot use the setTargetDisplay and put an overlay on it!

I know Java, recently started with the Android SDK and have zero experience in C

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1 Answer

  1. Editorial Team

    Have you considered using OpenCV’s Android port? It can do a lot more than just color conversion, and it’s quite fast.

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