Multispectral Pedestrian Detection: Benchmark Dataset and Baseline Soonmin Hwang, Jaesik Park, Namil Kim, Yukyung Choi, In So Kweon Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea.

Caltech [4] KITTI [1] LSI [2] ASL-TID [5] TIV [7] OSU-CT [3] LITIV [6] Ours

192k 128k 12k 1.6k 10.2k 6.2k – 5.6k – – – – – – 41.5k 50.2k

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occ. labels color thermal moving cam. video seqs. temporal corr. aligned channels publication

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Figure 1: Examples of proposed multispectral pedestrian dataset. It consists of aligned color-thermal image pairs for day and night traffic scenes. The Table 1: Comparision of several pedestrian datasets. The proposed dataset annotations provided with the dataset such as green, yellow, and red boxes is largest color-thermal dataset providing occlusion labels and temporal corindicate no-occlusion, partial occlusion, and heavy occlusion respectively. respondences captured in a regular traffic scene.

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Figure 2: Our hardware capturing aligned color-thermal image pairs.

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79.26%, ACF 72.46%, ACF+T 68.11%, ACF+T+TM+TO 64.76%, ACF+T+THOG −2

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Figure 3: From left to right, three figures show pedestrian detection performance on the day&night, day, and night traffic scenes. ACF (green curve) indicates color based detection algorithm, and other curves indicate colorPedestrian detection is active research area in the field of computer vision. thermal based detection algorithms. Although various methods have been studied for a long time, pedestrian detection is still regarded as a challenging problem, limited by tiny and occluded appearances, cluttered backgrounds, and bad visibility at night. In baselines to handle multispectral images and analyze the performance. One particular, even though color cameras have difficulty getting useful infor- of our baseline reduces the average miss rate by 15% on the proposed mulmation at night, most of the current approaches are based on color images. tispectral pedestrian dataset. To address this limitation, one possible way is to utilize additional inThrough the experiments, we determined that the aligned multispectral formation from another spectral band such as infrared. Among near infrared images are very helpful for improving pedestrian detection performance in (0.75∼1.3µm) and long-wave infrared (7.5∼13µm, also known as the ther- various conditions (shown in Fig. 3). We expect that the proposed dataset mal band) camera, we used a long-wave infrared camera rather than near can encourage the development of better pedestrian detection methods. infrared cameras. Physically, living things such as human radiate heat, e.g. long-wave infrared signal. Thus, pedestrians are more visible in long-wave [1] P.Lenz A.Geiger and R.Urtasun. Are we ready for autonomous driving? infrared cameras than in near infrared cameras. the kitti vision benchmark suite. In Proceedings of IEEE Conference on Based on these facts, we introduce a multispectral pedestrian dataset Computer Vision and Pattern Recognition (CVPR), 2012. which provides thermal image sequences of regular traffic scenes as well [2] U. Nunes J.M. Armingol D. Olmeda, C. Premebida and A. de la Esas color image sequences. In constrast to most previous datasets utilizing a calera. Pedestrian classification and detection in far infrared images. color-thermal stereo setup, we use beam splitter-based hardware (shown in Integrated Computer-Aided Engineering, 20:347–360, 2013. Fig. 2) to physically align the two image domains. Therefore, our dataset [3] J. Davis and V. Sharma. Background-subtraction using contour-based is free from parallax and does not require an image alignment algorithm fusion of thermal and visible imagery. Computer Vision and Image for post processing. Examples of our dataset with annotations are shown Understanding, 106(2–3):162–182, 2007. in Fig. 1. A survey on the previous datasets are summarized in Table 1. [4] P. Dollár, C. Wojek, B. Schiele, and P. Perona. Pedestrian detection: A Our contributions are threefold: (1) We introduce the multispectral pedesbenchmark. 2009. trian dataset, which provides aligned color and thermal image pairs. Our [5] M. Chli J. Portmann, S. Lynen and R. Siegwart. People detection and dataset has number of image frames as large as widely used pedestrian tracking from aerial thermal views. datasets [1, 4]. The dataset also contains nighttime traffic sequences which [6] A. Torabi, G. MassÃl’, and G.-A Bilodeau. An iterative integrated are rarely provided or discussed in previous datasets. (2) We analyze the framework for thermal-visible image registration, sensor fusion, and complementary relationship between the color and thermal channels, and people tracking for video surveillance applications. Computer Vision suggest how to combine the strong points of the two channels instead of and Image Understanding, 116:210–221, 2012. using the color or thermal channel independently. (3) We propose several [7] D. Theriault Z. Wu, N. Fuller and M. Betke. A thermal infrared video This is an extended abstract. The full paper is available at the Computer Vision Foundation benchmark for visual analysis. In Proceeding of 10th IEEE Workshop webpage. Our multispectral pedestrian dataset is available in our project web page: http:// on Perception Beyond the Visible Spectrum (PBVS), 2014. rcv.kaist.ac.kr/multispectral-pedestrian/

Multispectral Pedestrian Detection: Benchmark Dataset ...

Multispectral Pedestrian Detection: Benchmark Dataset and Baseline. Soonmin Hwang, Jaesik Park, Namil Kim, Yukyung Choi, In So Kweon. Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea. Figure 1: Examples of proposed multispectral pedestrian dataset. It consists of aligned color-thermal ...

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