Editing BMP file format (section)

=== Example 2 ===
Following is an example of a 4×2 pixel, 32-bit bitmap with opacity values in the alpha channel (Windows DIB Header {{mono|BITMAPV4HEADER}}) with pixel format ARGB32.

{| class="wikitable"
! Offset
(hex)
! Size
(bytes)
! Hex value
! Value
! Description
|-
| colspan="5" style="text-align: center;" | BMP Header
|-
| align="center" |00
| align="center" |2
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|42 4D
| style="padding: 0px 10px"|"BM"
| style="padding: 0px 10px"|ID field (42h, 4Dh)
|-
| align="center" |02
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|9A 00 00 00
| style="padding: 0px 10px"|154 bytes (122+32)
| style="padding: 0px 10px"|Size of the BMP file
|-
| align="center" |06
| align="center" |2
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00 00
| style="padding: 0px 10px"|Unused
| style="padding: 0px 10px"|Application specific
|-
| align="center" |08
| align="center" |2
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00 00
| style="padding: 0px 10px"|Unused
| style="padding: 0px 10px"|Application specific
|-
| align="center" |0A
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|7A 00 00 00
| style="padding: 0px 10px"|122 bytes (14+108)
| style="padding: 0px 10px"|Offset where the pixel array (bitmap data) can be found
|-
| colspan="5" style="text-align: center;" | DIB Header
|-
| align="center" |0E
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|6C 00 00 00
| style="padding: 0px 10px"|108 bytes
| style="padding: 0px 10px"|Number of bytes in the DIB header (from this point)
|-
| align="center" |12
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|04 00 00 00
| style="padding: 0px 10px"|4 pixels (left to right order)
| style="padding: 0px 10px"|Width of the bitmap in pixels
|-
| align="center" |16
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|02 00 00 00
| style="padding: 0px 10px"|2 pixels (bottom to top order)
| style="padding: 0px 10px"|Height of the bitmap in pixels
|-
| align="center" |1A
| align="center" |2
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|01 00
| style="padding: 0px 10px"|1 plane
| style="padding: 0px 10px"|Number of color planes being used
|-
| align="center" |1C
| align="center" |2
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|20 00 
| style="padding: 0px 10px"|32 bits
| style="padding: 0px 10px"|Number of bits per pixel
|-
| align="center" |1E
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|03 00 00 00
| style="padding: 0px 10px"|3
| style="padding: 0px 10px"|BI_BITFIELDS, no pixel array compression used
|-
| align="center" |22
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|20 00 00 00
| style="padding: 0px 10px"|32 bytes
| style="padding: 0px 10px"|Size of the raw bitmap data (including padding)
|-
| align="center" |26
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|13 0B 00 00
| style="padding: 0px 10px"|2835 pixels/metre horizontal
| style="padding: 0px 10px" rowspan="2"|Print resolution of the image,<br /> [[Dots per inch|72 DPI]] × 39.3701 inches per metre yields 2834.6472  
|-
| align="center" |2A
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|13 0B 00 00
| style="padding: 0px 10px"|2835 pixels/metre vertical
|-
| align="center" |2E
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00 00 00 00
| style="padding: 0px 10px"|0 colors
| style="padding: 0px 10px"|Number of colors in the palette
|-
| align="center" |32
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00 00 00 00
| style="padding: 0px 10px"|0 important colors
| style="padding: 0px 10px"|0 means all colors are important
|-
| align="center" |36
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00 00 FF 00
| style="padding: 0px 10px"|00FF0000 in big-endian
| style="padding: 0px 10px"|Red channel bit mask (valid because BI_BITFIELDS is specified)
|-
| align="center" |3A
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00 FF 00 00
| style="padding: 0px 10px"|0000FF00 in big-endian
| style="padding: 0px 10px"|Green channel bit mask (valid because BI_BITFIELDS is specified)
|-
| align="center" |3E
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|FF 00 00 00
| style="padding: 0px 10px"|000000FF in big-endian
| style="padding: 0px 10px"|Blue channel bit mask (valid because BI_BITFIELDS is specified)
|-
| align="center" |42
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00 00 00 FF
| style="padding: 0px 10px"|FF000000 in big-endian
| style="padding: 0px 10px"|Alpha channel bit mask
|-
| align="center" |46
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|20 6E 69 57
| style="padding: 0px 10px"|little-endian "<code>Win </code>"
| style="padding: 0px 10px"|LCS_WINDOWS_COLOR_SPACE
|-
| align="center" |4A
| align="center" |36
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00...00
| style="padding: 0px 10px"|CIEXYZTRIPLE Color Space endpoints
| style="padding: 0px 10px"|Unused for LCS "<code>Win </code>" or "<code>sRGB</code>"
|-
| align="center" |6E
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00 00 00 00
| style="padding: 0px 10px"|0 Red Gamma
| style="padding: 0px 10px"|Unused for LCS "<code>Win </code>" or "<code>sRGB</code>" 
|-
| align="center" |72
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00 00 00 00
| style="padding: 0px 10px"|0 Green Gamma
| style="padding: 0px 10px"|Unused for LCS "<code>Win </code>" or "<code>sRGB</code>" 
|-
| align="center" |76
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00 00 00 00
| style="padding: 0px 10px"|0 Blue Gamma
| style="padding: 0px 10px"|Unused for LCS "<code>Win </code>" or "<code>sRGB</code>" 
|-
| colspan="5" align="center"|Start of the Pixel Array (the bitmap Data)
|-
| align="center" |7A
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|FF 00 00 7F
| style="padding: 0px 10px"|255 0 0 127
| style="padding: 0px 10px"|Blue (Alpha: 127), Pixel (x=0, y=1)
|-
| align="center" |7E
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00 FF 00 7F
| style="padding: 0px 10px"|0 255 0 127
| style="padding: 0px 10px"|Green (Alpha: 127), Pixel (x=1, y=1)
|-
| align="center" |82
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00 00 FF 7F
| style="padding: 0px 10px"|0 0 255 127
| style="padding: 0px 10px"|Red (Alpha: 127), Pixel (x=2, y=1)
|-
| align="center" |86
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|FF FF FF 7F
| style="padding: 0px 10px"|255 255 255 127
| style="padding: 0px 10px"|White (Alpha: 127), Pixel (x=3, y=1)
|-
| align="center" |8A
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|FF 00 00 FF
| style="padding: 0px 10px"|255 0 0 255
| style="padding: 0px 10px"|Blue (Alpha: 255), Pixel (x=0, y=0)
|-
| align="center" |8E
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00 FF 00 FF
| style="padding: 0px 10px"|0 255 0 255
| style="padding: 0px 10px"|Green (Alpha: 255), Pixel (x=1, y=0)
|-
| align="center" |92
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|00 00 FF FF
| style="padding: 0px 10px"|0 0 255 255
| style="padding: 0px 10px"|Red (Alpha: 255), Pixel (x=2, y=0)
|-
| align="center" |96
| align="center" |4
| style="padding: 0px 20px; white-space: nowrap; font-family:monospace;"|FF FF FF FF
| style="padding: 0px 10px"|255 255 255 255
| style="padding: 0px 10px"|White (Alpha: 255), Pixel (x=3, y=0)
|}

Note that the bitmap data starts with the lower left hand corner of the image.