c:\test\img\tmp>imageinfo --verbose worldx2-2.jpg
worldx2-2.jpg
        File format: JPEG
        MIME type: image/jpeg
        Width (pixels): 5400
        Height (pixels): 2700
        Bits per pixel: 24
        Number of images: 1
        Physical width (dpi): 72
        Physical height (dpi): 72
        Physical width (inches): 75
        Physical height (inches): 37.500000
        Number of textual comments: 0

c:\test\img\tmp>..\..\Jpg2bmp.pl worldx2-2.jpg

c:\test\img\tmp>imageinfo --verbose worldx2-2.bmp
worldx2-2.bmp
        File format: BMP
        MIME type: image/bmp
        Width (pixels): 5400
        Height (pixels): 2700
        Bits per pixel: 24
        Number of images: 1
        Physical width (dpi): 300
        Physical height (dpi): 300
        Physical width (inches): 18
        Physical height (inches): 9
        Number of textual comments: 0