I copy your image, then crop it to the rims. I square the width/height to the same size.
Then I rotate it 45 degrees and crop again to the rims and make the outsides the same.
I rotate it 45 degrees in the opposite direction (which brings it back to horizontal) and crop one last time.
Turn the image to grayscale to remove the unwanted color, then contrast the image. Then you there.
Then I rotate it 45 degrees and crop again to the rims and make the outsides the same.
I rotate it 45 degrees in the opposite direction (which brings it back to horizontal) and crop one last time.
Turn the image to grayscale to remove the unwanted color, then contrast the image. Then you there.


























