id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
work_kybbk22puncxpbwlwra5tzagve	Ding Li	Research on the Key Technology of Survey Measurement Image Based on UAV	2018	5	.pdf	application/pdf	2117	180	54	Research on the Key Technology of Survey Measurement Image Based on UAV especially the emergence of high resolution image sensor, aerial Image Preprocessing; Image Matching; Feature Extraction At present, UAV surveying mainly relies on image aerial Correction of image distortion -Indirect method, the coordinates of the corresponding point on the original image x, y: coordinate of the image point which origin is the center of the image, x0, y0 : coordinates of the main point of Find the matching point in the top level image, the to match other feature points [6]. images and matching SIFT feature vectors. point will be a candidate for image at this scale. extract image feature points, uses the two-dimensional The matching test image is shown in figure 3. implement SIFT to extract the image feature points. two-dimension feature point matching method BruteForce Distinctive Image Features from Scale-Invariant Distinctive Image Features from Scale-Invariant 	./cache/work_kybbk22puncxpbwlwra5tzagve.pdf	./txt/work_kybbk22puncxpbwlwra5tzagve.txt