Question about the coordinate system transformation

Thanks for the great work! However, I still have a question about the coordinate system transformation.

giraffe/im2scene/giraffe/models/generator.py

Lines 399 to 402 in 39da6b4

    
           # Arange Pixels 
        
           pixels = arange_pixels((res, res), batch_size, 
        
                                  invert_y_axis=False)[1].to(device) 
        
           pixels[..., -1] *= -1.

In the above codes, you first generate the coordinates under the image coordinate system, then invert the y-axis. What is the purpose of this operation?

Looking forward to your reply.

This is how our coordinate system is defined: second axis goes from top to bottom as opposed to bottom to top. It is a common system when working with images!

	# Arange Pixels
	pixels = arange_pixels((res, res), batch_size,
	invert_y_axis=False)[1].to(device)
	pixels[..., -1] *= -1.