EEG electrode space positioning method based on up shot measure
A close-range photography and spatial positioning technology, which is applied in 3D image processing, 2D image generation, image data processing, etc., can solve problems such as emission magnetic field distortion, limited measurement accuracy, and high operating environment requirements
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[0021] exist figure 1 , S is the photographic center, and the coordinates are (X s , Y s ,Z s ); M is the control point or the point to be measured, and the actual position of the coordinates is (X, Y, Z); m is the principal point of imaging, and the coordinates are (x, y). In the inverse problem method, it is the image coordinate of the calibration point , in the direct problem method, it is the photo point coordinates; when solving the inverse problem, the image coordinates (x, y), coordinates (X, Y, Z) are known, and when solving the direct problem, the image coordinates (x, y) is known, the coordinates (X, Y, Z) are not known. In the figure, P is the image plane, and W is a plane perpendicular to the x-z plane and forming an angle K with the P plane.
[0022] exist figure 2 Among them, 1 is a calibration object, 2 is a calibration point, 3 is an electrode to be measured, 4 is a point to be measured, 5 is a non-measurement camera, and marks 1-18 are different shooting...
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