Traditional Culture Encyclopedia - Photography and portraiture - What are the coordinates of image points and corresponding control points in close-range photogrammetry?
What are the coordinates of image points and corresponding control points in close-range photogrammetry?
The coordinates of image points are the coordinates in the image plane coordinate system, and each image point corresponds to its actual coordinates (object coordinates). For example, take a photo of a house and find a corner in the photo. This corner point has a coordinate (x, y) (two-dimensional) in the image plane coordinate system and a coordinate (x, y, z) in the actual three-dimensional space (the object coordinate is determined according to the actually defined coordinate system). If the coordinates of the image point and the object point of this corner are known (the object point coordinates can be measured by instruments, such as total station), then it can be used as the control point of this photo.
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