EXIF tag · SubIFD

ChromaBlurRadius

The ChromaBlurRadius tag stored in the SubIFD directory.

0xc631
Tag ID (50737 decimal)
SubIFD
IFD / group
rational64u!
Data type
EXIF
Table

What ChromaBlurRadius means#

The ChromaBlurRadius tag stored in the SubIFD directory.

Read, write and remove it#

# read
exiftool -ChromaBlurRadius photo.jpg
# write
exiftool -ChromaBlurRadius="…" photo.jpg
# remove
exiftool -ChromaBlurRadius= photo.jpg
# all files in a folder, as CSV
exiftool -csv -ChromaBlurRadius -r ./photos > chroma-blur-radius.csv

In Python with Pillow:

from PIL import Image
exif = Image.open("photo.jpg").getexif()
value = exif.get(0xc631)  # ChromaBlurRadius
print(value)

Frequently asked questions#

What is the EXIF tag ID of ChromaBlurRadius?

0xc631 (50737 decimal), in the SubIFD directory.

How do I see ChromaBlurRadius in a photo?

Run exiftool -ChromaBlurRadius 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