eprintid: 10086021
rev_number: 36
eprint_status: archive
userid: 608
dir: disk0/10/08/60/21
datestamp: 2019-11-20 14:35:48
lastmod: 2021-12-14 23:35:39
status_changed: 2019-11-20 14:35:48
type: proceedings_section
metadata_visibility: show
creators_name: Nixon, M
creators_name: Outlaw, F
creators_name: MacDonald, LW
creators_name: Leung, TS
title: The importance of a device specific calibration for smartphone colorimetry
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F44
divisions: F42
note: Reprinted with permission of IS&T: The Society for Imaging Science and Technology sole copyright owners of, "CIC27: Twenty-seventh Color and Imaging Conference 2019",
abstract: In order for a smartphone-based colorimetry system to be generalizable, it must be possible to account for results from multiple phones. A move from device-specific space to a device independent space such as XYZ space allows results to be compared, and means that the link between XYZ values and the physical parameter of interest needs only be determined once. We compare mapping approaches based on calibration data provided in image metadata, including the widely used open-source software dcraw, to a separate calibration carried out using a colorcard. The current version of dcraw is found to behave suboptimally with smartphones and should be used with care for mapping to XYZ. Other metadata approaches perform better, however the colorcard approach provides the best results. Several phones of the same model are compared and using an xy distance metric it is found that a device-specific calibration is required to maintain the desired precision.
date: 2019-10-21
date_type: published
publisher: Society for Imaging Science and Technology
official_url: https://doi.org/10.2352/issn.2169-2629.2019.27.10
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 1719209
doi: 10.2352/issn.2169-2629.2019.27.10
lyricists_name: Leung, Terence
lyricists_name: Macdonald, Lindsay
lyricists_name: Nixon-Hill, Miranda
lyricists_name: Outlaw, Thomas
lyricists_id: TSTLE21
lyricists_id: LWMAC04
lyricists_id: MNIXO69
lyricists_id: TFJOU93
actors_name: Nixon, Miranda
actors_id: MNIXO69
actors_role: owner
full_text_status: public
series: Color and Imaging Conference
publication: Color and Imaging Conference
volume: 27
number: 1
place_of_pub: Paris, France
pagerange: 49-54
event_title: 27th Color and Imaging Conference (CIC27)
issn: 2166-9635
book_title: 27th Color and Imaging Conference Final Program and Proceedings
citation:        Nixon, M;    Outlaw, F;    MacDonald, LW;    Leung, TS;      (2019)    The importance of a device specific calibration for smartphone colorimetry.                     In:  27th Color and Imaging Conference Final Program and Proceedings.  (pp. pp. 49-54).  Society for Imaging Science and Technology: Paris, France.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10086021/1/CIC_Final.pdf