crop(left /*int*/, top /*int*/, width /*int*/, height /*int*/) {
			const newSource = this.binarizer.getLuminanceSource().crop(left, top, width, height);
			return new BinaryBitmap(this.binarizer.createBinarizer(newSource));
		}
Returns a new object with cropped image data. Implementations may keep a reference to the
original data rather than a copy. Only callable if isCropSupported() is true.

@param left The left coordinate, which must be in [0,getWidth())
@param top The top coordinate, which must be in [0,getHeight())
@param width The width of the rectangle to crop.
@param height The height of the rectangle to crop.
@return A cropped version of this object.