Coordinate transformation method for digital scanning change-over device and processor
A technology of digital scanning transformation and coordinate transformation, which is applied in the direction of electrical digital data processing, digital data processing components, and devices that perform calculation operations by changing the amount of electricity or magnetism. High-precision, large-capacity and real-time work of the imager, inflexible performance adjustment, etc.
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[0051] Below in conjunction with the best embodiment shown in the accompanying drawings, it will be further described in detail.
[0052] The present invention is used in the coordinate transformation method of digital scanning transformation device, in order to convert rectangular coordinate value (x0, y0) into polar coordinate value (r, p), comprises steps:
[0053] (1). Initialization process: assign the phase judgment variables Xs, Ys and the angle variable z(0) to 0, and set the sign variable cout i assign a value of 1;
[0054] (2). Preprocessing: Assign values to the phase judgment variables Xs, Ys according to the Cartesian coordinate value (x0, y0), and convert (x0, y0) into an unsigned number: if X0<0, then Xs = 1; if Y0<0, then Ys=1;
[0055] And (x0, y0) = (|x0|, |y0|);
[0056] (3). The CORDIC algorithm operation is divided into two stages in turn:
[0057] The first stage: use the left shift operation to perform a iteration of the CORDIC algorithm, namely: ...
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