class_docstr: Crop a subimage from an image.
class_docstr_tok: ["Crop","a","subimage","from","an","image","."]
code: def apply_image(self, img):
      return img[self.y0 : self.y0 + self.h, self.x0 : self.x0 + self.w]
  
imports: import numpy
  import cv2
  from ...utils.argtools import log_once
  from .base import ImageAugmentor, _default_repr
label_desc: Use image node_id 2 for calling the CropTransform obj's underlying member method code with example usage: obj.apply_image(img) and returns: img