React native – Detect the image is blur or not

To capture images with additional information such as blur, white/black balance, reflection, and other image quality metrics in a React Native application, you can use libraries that provide computer vision and image processing capabilities. One such library is OpenCV, which has bindings for React Native through the "react-native-opencv" package. Here’s how you can get started with it:

1. Install react-native-opencv:

   You can install the "react-native-opencv" package using npm or yarn:

   npm install react-native-opencv --save
   # or
   yarn add react-native-opencv
   

2. Link the package:

   React Native 0.59 and later support automatic linking, but if you are using an earlier version, you may need to manually link the package using react-native link react-native-opencv.

3. Configure Native Modules:

   You may need to configure native modules in your project to use OpenCV. Follow the installation instructions provided in the "react-native-opencv" documentation to set up native modules properly for your platform (iOS/Android).

4. Use OpenCV for Image Processing:

   Once you have "react-native-opencv" set up, you can use OpenCV to process the captured images and obtain the desired image quality metrics. OpenCV provides a wide range of image processing functions for tasks like blurriness detection, color balance, reflection removal, and more.

   Here’s a basic example of how you can use OpenCV to check for image blur:

   import { NativeModules } from 'react-native';
   
   // Replace 'YourImagePath' with the actual path to your captured image.
   const imagePath = 'YourImagePath';
   
   // Load the OpenCV module
   const { OpenCV } = NativeModules;
   
   // Check for image blur
   OpenCV.checkImageBlur(imagePath)
     .then(isBlurry => {
       if (isBlurry) {
         console.log('Image is blurry.');
       } else {
         console.log('Image is not blurry.');
       }
     })
     .catch(error => {
       console.error('Error processing image:', error);
     });
   

   Note that you can use OpenCV functions to perform other quality checks like color balance, reflection removal, etc., depending on your specific requirements.

Please refer to the "react-native-opencv" documentation and OpenCV documentation for more details on how to use OpenCV for image processing in your React Native application. Keep in mind that this is just one option, and there may be other libraries or approaches available depending on your specific use case.