TY - CONF

T1 - Colorimetric calibration of high dynamic range images with a ColorChecker chart

AU - Varghese, D.

AU - Wanat, R.

AU - Mantiuk, R.K.

PY - 2014/3/4

Y1 - 2014/3/4

N2 - Abstract In this paper we assess the quality of colorimetric calibration of HDR images captured using the multi-exposure technique. Three cameras were used to take HDR photographs of 4 scenes containing a color checker chart (X-Rite) and custom color patches. These were also measured using a spectrometer to provide ground truth data. One of the scenes was then used as a training for 2 camera calibration models, one including and one without the black level. The parameters of the models were fitted by optimizing an error function based on the CIE2000 ∆ Ecolor error measure. For the remaining 3 scenes, the accuracy of the fit was verified using the CIE2000 ∆E error between the measured and predicted color values. Our results indicate that a very good fit can be achieved, in the range of 0.8 to 2.1 ∆E using the model without black level.

AB - Abstract In this paper we assess the quality of colorimetric calibration of HDR images captured using the multi-exposure technique. Three cameras were used to take HDR photographs of 4 scenes containing a color checker chart (X-Rite) and custom color patches. These were also measured using a spectrometer to provide ground truth data. One of the scenes was then used as a training for 2 camera calibration models, one including and one without the black level. The parameters of the models were fitted by optimizing an error function based on the CIE2000 ∆ Ecolor error measure. For the remaining 3 scenes, the accuracy of the fit was verified using the CIE2000 ∆E error between the measured and predicted color values. Our results indicate that a very good fit can be achieved, in the range of 0.8 to 2.1 ∆E using the model without black level.

UR - http://www.ic1005-hdri.com/HDRi_2014.pdf

M3 - Paper

T2 - HDRi2014 - Second International Conference and SME Workshop on HDR imaging, Sarajevo, Bosnia and Herzegovina 4-5 March, 2014

Y2 - 3 January 0001

ER -