基于无人机航拍照片的西安城市形象感知研究

doi:10.18306/dlkxjz.2021.09.014

Abstract

Abstract:

With the rapid development of civilian unmanned aerial vehicle (UAV) technology, UAV aerial photography has become an important data source for urban image perception research. Based on the photos, text introduction, shooting location, and related data of UAVs photos of Xi'an City obtained from the social media platform SkyPixel, this study used computer vision analysis, computer text emotion analysis, social network analysis, and GIS spatial analysis to explore the city image of Xi'an from the perspective of UAV. The research results show that: 1) UAV aerial photography photos are mainly concentrated in the main urban areas, and there are fewer aerial data points in the suburb. The spatial distribution of photos presents a pattern of dense inside and sparse outside, with the highest density area in the center of the city at the junction zone of the three districts, showing a dumbbell-type distribution extending from the north to south. 2) The visual images are mostly of modern urban landscape description, of which the content of human landscape is dominant. 3) Emotion evaluation presents an overall positive feeling, and the polarization of the popular tourist attractions is obvious in the main urban area. Finally, this study explored the mechanism of city image formation and promotion from the perspective of UAV, and provided recommendations for the optimization of Xi'an city image construction and UAV use policy.

Key words: city image, visual analysis, UAV, aerial photography photos, Xi'an City

CHEN Xiliang, LI Gang, XU Feng, YU Yue, ZHANG Qianxi. City image perception of Xi’an based on unmanned aerial vehicle photography photos[J].PROGRESS IN GEOGRAPHY, 2021, 40(9): 1600-1612.

Figures/Tables 7

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References 57

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序号	关键词	词频	比重/%	序号	关键词	词频	比重/%
1	outdoor	729	7.04	29	bridge	52	0.50
2	large	677	6.53	30	colorful	51	0.49
3	city	613	5.92	31	white	51	0.49
4	building	509	4.91	32	body	50	0.48
5	water	432	4.17	33	small	48	0.46
6	light	415	4.01	34	harbor	47	0.45
7	night	379	3.66	35	yellow	45	0.43
8	sitting	361	3.48	36	old	43	0.42
9	street	256	2.47	37	lake	42	0.41
10	traffic	216	2.08	38	red	42	0.41
11	grass	199	1.92	39	indoor	41	0.40
12	road	195	1.88	40	highway	38	0.37
13	lit	187	1.81	41	truck	37	0.36
14	mountain	176	1.70	42	riding	35	0.34
15	track	126	1.22	43	bench	34	0.33
16	boat	125	1.21	44	group	34	0.33
17	green	119	1.15	45	people	33	0.32
18	river	109	1.05	46	black	30	0.29
19	snow	98	0.95	47	park	30	0.29
20	car	89	0.86	48	clock	29	0.28
21	man	86	0.83	49	tower	29	0.28
22	field	73	0.70	50	fireworks	28	0.27
23	nature	69	0.67	51	front	28	0.27
24	standing	69	0.67	52	bright	25	0.24
25	hill	63	0.61	53	parked	25	0.24
26	covered	59	0.57	54	sunset	25	0.24
27	dark	59	0.57	55	valley	25	0.24
28	long	59	0.57	56	cloudy	24	0.23

分类	占比/%	关键词
人文景观	25.21	city, building, lit, bench, park, clock, tower, fireworks, light
形容词	23.49	outdoor, large, standing, old, small, indoor, bright, long, covered, front
自然景观	22.65	water, grass, mountain, river, snow, field, nature, hill, lake, sunset, valley, night, cloudy
交通	15.49	street, traffic, road, track, car, bridge, harbor, highway, boat, truck, parked
人物及活动	7.91	sitting, body, man, people, riding, group
色彩	5.25	green, white, yellow, colorful, red, black, dark

City image perception of Xi’an based on unmanned aerial vehicle photography photos

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