Getting Probe Information

Now we are able to identify all the markers and the mock dummy. With the markers' 3D spatial information we are trying to get the position of the probe first. We measure the distance between the center of the markers and get:


blue-green: 116mm
blue-yellow: 83mm

We define a black circle which is the upperleft corner of the mock dummy and will be the relative zero point in the xyz cordinates. x axis points towards right, y points up and z points out the image.
We also require the three markers of the probe be positioned at the rectangles drawn in the image to identify. The board which carries the blue and green markers should be horizontal.

From the given data we want to find the relation between the pixel index and the 3D coordinates information, which includes 1)Up vector; 2) View direction for the ultrasound image