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Version: 0.2.0

Class: Camera

CameraView.Camera

A camera component with CameraProps.onCapture and CameraProps.onFrame callbacks. To programmatically trigger a capture, call the takePicture function.

export default function App() {
  const {imageClass, processImage} = useImageClassification(
    require('./resnet18.ptl'),
  );

  const handleFrame = useCallback(
    async (image: Image) => {
      await processImage(image);
      image.release();
    },
    [processImage],
  );

  return (
    <>
      <Camera
        style={styles.camera}
        onFrame={handleFrame}
        hideCaptureButton={true}
      />
      <Text>{imageClass}</Text>
    </>
  );
}

component

Hierarchy​

Methods​

flip​

▸ flip(): void

Returns​

void

Defined in​

CameraView.tsx:212

takePicture​

▸ takePicture(): void

The takePicture function captures an image from the camera and then trigger the onCapture callback registered on the Camera component.

export default function CameraTakePicture() {
  const cameraRef = React.useRef<Camera>(null);

  async function handleCapture(image: Image) {
    // Use captured image before releasing it.
    image.release();
  }

  function handleTakePicture() {
    const camera = cameraRef.current;
    if (camera != null) {
      camera.takePicture();
    }
  }

  return (
    <>
      <Camera
        ref={cameraRef}
        onCapture={handleCapture}
        hideCaptureButton={true}
        style={StyleSheet.absoluteFill}
        targetResolution={{width: 480, height: 640}}
        facing={CameraFacing.BACK}
      />
      <Button title="Take Picture" onPress={handleTakePicture} />
    </>
  );
}

Returns​

void

Defined in​

CameraView.tsx:198