biYPelsPerMeter
biYPelsPerMeter is a metadata field in the Windows bitmap file formats, specifically within the BITMAPINFOHEADER. It records the vertical resolution of an image in units of pixels per meter. Its horizontal counterpart is biXPelsPerMeter. Together, these fields describe how large an image should appear when printed or displayed at a physical size.
The values are 32-bit signed integers. A value of 0 means the resolution is unspecified. Nonzero values
Usage and implications: These fields serve as metadata that can help software estimate the physical size of
Notes: Since many image viewers and printers do not rely on these values, biYPelsPerMeter should not be