BMP image header - biXPelsPerMeter

Question

I have read a lot about BMP file format structure but I still cannot get what is the real meaning of the fields "biXPelsPermeter" and "biYPelsPermeter". I mean in practical way, how is it used or how it can be utilized. Any example or experience? Thanks a lot

Answer 1

biXPelsPermeter Specifies the horizontal print resolution, in pixels per meter, of the target device for the bitmap.

biYPelsPermeter Specifies the vertical print resolution.

Its not very important. You can leave them on 2835 its not going to ruin the image. (72 DPI × 39.3701 inches per meter yields 2834.6472)