Standard: ISO 18844:2017 – Digital cameras – Image flare measurement
Technical Committee: ISO/TC 42 Photography
Published: 2017-05


ISO 18844 is a flare calculation that works with diagonal arrays of high density light traps (black holes). Imatest’s original veiling glare analysis only measures a single localized spot, but the effects of flare can vary at different locations within the field of your lens.

ISO 18844 measurement type C (using a single image of a chart with light traps) has been added to the Imatest Uniformity and Uniformity Interactive modules of Imatest 5.0. Its operation is described in the Veiling Glare page.

ISO 18844 chart, showing dimensions of outer portion outside the image plane

Sample Imatest ISO 18844 result


See Also