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Analyze images

The image analysis use case provides your app with a CPU-accessible image to perform image processing, computer vision, or machine learning inference on. The application implements an Analyzer method that is run on each frame.


Images are processed by passing a method that takes an ImageProxy parameter and a rotation parameter to the setAnalyzer() method.

The following code example shows how to do this, as well as how to bind the image analysis use case and a preview use case to the LifecycleOwner. To read about creating preview use cases, see Implement a preview.

Upon return from this method, the image reference is closed. Therefore, the method should complete analysis or make a copy instead of passing the image reference beyond the analysis method.


val imageAnalysisConfig = ImageAnalysisConfig.Builder()
    .setTargetResolution(Size(1280, 720))
val imageAnalysis = ImageAnalysis(imageAnalysisConfig)

imageAnalysis.setAnalyzer({ image: ImageProxy, rotationDegrees: Int ->
    // insert your code here.

CameraX.bindToLifecycle(this as LifecycleOwner, imageAnalysis, preview)


ImageAnalysisConfig config =
    new ImageAnalysisConfig.Builder()
        .setTargetResolution(new Size(1280, 720))

ImageAnalysis imageAnalysis = new ImageAnalysis(config);

    new ImageAnalysis.Analyzer() {
        public void analyze(ImageProxy image, int rotationDegrees) {
            // insert your code here.

CameraX.bindToLifecycle((LifecycleOwner) this, imageAnalysis, preview);

CameraX produces images in YUV_422_888 format.

Additional resources

To learn more about CameraX, consult the following additional resources.


  • Getting Started with CameraX
  • Code sample

  • Official CameraX sample app