EXIF tag · ExifIFD

BrightnessValue

Scene brightness in APEX units measured by the camera.

0x9203
Tag ID (37379 decimal)
ExifIFD
IFD / group
rational64s
Data type
EXIF
Table

What BrightnessValue means#

Scene brightness in APEX units measured by the camera.

Read, write and remove it#

# read
exiftool -BrightnessValue photo.jpg
# write
exiftool -BrightnessValue="…" photo.jpg
# remove
exiftool -BrightnessValue= photo.jpg
# all files in a folder, as CSV
exiftool -csv -BrightnessValue -r ./photos > brightness-value.csv

In Python with Pillow:

from PIL import Image
exif = Image.open("photo.jpg").getexif()
value = exif.get_ifd(0x8769).get(0x9203)  # BrightnessValue
print(value)

Other ExifIFD tags#

Frequently asked questions#

What is the EXIF tag ID of BrightnessValue?

0x9203 (37379 decimal), in the ExifIFD directory.

How do I see BrightnessValue in a photo?

Run exiftool -BrightnessValue photo.jpg, or open the file's info panel in Lightroom, Photoshop, Windows (Properties → Details) or macOS Preview (Tools → Show Inspector).

Last updated October 03, 2026 · How we calculate · Sources

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