Math error in DNG lens correction?

[Paolo DePetrillo]

Comparing to the DNG spec, I think there’s a * in this line that should be a +, in ExifLensCorrection::correctDistortion:

    const float f = dist_[0] + r2 * (dist_[1] + r2 * (dist_[2] * r2 * dist_[3]));

should be:

    const float f = dist_[0] + r2 * (dist_[1] + r2 * (dist_[2] + r2 * dist_[3]));

‌

Haven’t actually tested this myself as I just realized my phone camera outputs a no-op lens correction and doesn’t need it..

[agriggio]

looks like a typo indeed, thanks for reporting!

[agriggio]

fix typo in DNG distortion correction

Fixes #177

→ <<cset c118df4ed71e>>