After convert dxf to image, how can I know where is point (0, 0) in image?

[nlc2002]

I wanted to convert dxf file to image and do some image processing, and generate a new dxf file. But I don't know where (0,0) maps to in the image. So it's hard to map back to dxf file.

[mbway]

see #550
you probably want the DXF (WCS) to image transform

[nlc2002]

Thank you very much, you answer solved my urgent need!