Using HSI Color Space to Improve the Multispectral Lidar Classification Error Caused by Measurement Geometry

Biwu Chen; Shuo Shi; Jia SunBowen ChenKuanghui GuoLin DuJian YangQian XuShalei SongWei Gong

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Using HSI Color Space to Improve the Multispectral Lidar Classification Error Caused by Measurement Geometry

机译：Using HSI Color Space to Improve the Multispectral Lidar Classification Error Caused by Measurement Geometry

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摘要

Multispectral lidar has become a promising technology with the rise in capability of 3-D spectral imaging. However, the precise acquisition of spectral information is interfered by measurement geometry, namely, incidence angle and detection distance. These issues may cause discrepancy within the spectral information, thus limiting the classification capabilities of multispectral lidar. To fill this gap, a hue–saturation–intensity (HSI) color space-based method for multispectral lidar classification is proposed in this study. The proposed scheme does not require radiometric calibration, as the HSI color space is robust to spectral intensity variations within a single target. In this method, spectral data are transformed from red–green–blue (RGB) color space to HSI color space. The three components of the HSI color space are inputted for the classification. Then, a reference target-based radiometric calibration is conducted for comparison. The complex indoor scene and the random forest classifier are used for the validation. The classification results of using raw RGB data, raw HSI data, calibrated RGB data, and calibrated HSI data are compared. Results show that the raw HSI data outperform the raw RGB data in terms of classification accuracy. In particular, the raw HSI data can correct the classification error caused by the measurement geometry more effectively than the calibrated RGB data. The improvement resulting from using the HSI color space is demonstrated by both the three-wavelength multispectral lidar and the 32-channel multispectral lidar. That indicates that HSI color space is a promising tool for enhancing the classification capability of multispectral lidar.

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《IEEE Transactions on Geoscience and Remote Sensing》 |2021年第4期|3567-3579|共13页
作者
Biwu Chen; Shuo Shi; Jia SunBowen ChenKuanghui GuoLin DuJian YangQian XuShalei SongWei Gong;
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作者单位

School of Geography and Information Engineering, China University of Geosciences, Wuhan, China;

Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, China;

State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, China;

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正文语种英语
中图分类地球物理学;遥感技术;
关键词
Image color analysis; Laser radar; Radiometry; Calibration; Ceramics; Geometry; Imaging;

Using HSI Color Space to Improve the Multispectral Lidar Classification Error Caused by Measurement Geometry

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