Can we crop an image with point and size in Flutter?

Question

I'm writing a face detect app and I want to crop the face that have detected on screen with the bounding box of that face.

I have searched all the way but only can crop with width height and aspect ratio.

I don't want to crop manual like other image crop plugin because they also crop with width height and aspect ratio as well.

Answer 1

You can use https://github.com/brendan-duncan/image for that.

For your case, try to use copyCrop.

https://github.com/brendan-duncan/image/blob/master/lib/src/transform/copy_crop.dart

copy_crop.dart

import '../image.dart';

/// Returns a cropped copy of [src].
Image copyCrop(Image src, int x, int y, int w, int h) {
  Image dst = Image(w, h, channels: src.channels, exif: src.exif,
      iccp: src.iccProfile);

  for (int yi = 0, sy = y; yi < h; ++yi, ++sy) {
    for (int xi = 0, sx = x; xi < w; ++xi, ++sx) {
      dst.setPixel(xi, yi, src.getPixel(sx, sy));
    }
  }

  return dst;
}

Usage

var croppedImage = Image copyCrop(Image sampleImageSrc, int pointX, int pointY, int desiredWidth, int desiredHeight);