Table 2.

Distortion parameters of the five smartphones.

Model	${\mathit{k}}_1$	${\mathit{k}}_2$	${\mathit{k}}_3$	${\mathit{p}}_1$	${\mathit{p}}_2$
Xiaomi 5	0.2669712	−1.3343362	2.3560789	0.0000838	−0.0011337
Huawei P9	0.3681890	−2.7159514	5.8860170	−0.0003427	−0.0002340
Samsung Note5	0.1583478	−0.0505310	−1.2486040	0.0018383	−0.0035122
Lenovo Tango	0.1429239	−0.8092744	1.6563103	0.0007502	−0.0006649
iPhone 7P	0.3025997	−2.2794374	6.0508030	−0.0007280	0.0009931