Precondition conjugate gradient block adjustment method based on GPU (Graphics Processing Unit) parallel acceleration
A technology of block adjustment and conjugate gradient, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as increase, decrease in computing efficiency, increase in memory requirements, etc., to improve data processing capacity , Guaranteed processing accuracy, and the effect of saving hardware costs
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[0021] Embodiment 1. A preconditioned conjugate gradient block adjustment method based on GPU parallel acceleration. Combine below figure 1 The method provided in this embodiment will be described.
[0022] see figure 1 , S1, start the main program on the CPU side, detect and initialize available GPU devices, obtain GPU device information, if there are available GPU devices, continue to the next step, otherwise exit;
[0023] S2. Import the original data needed for block adjustment calculation at the CPU end, and unify the imported original data with a time-space reference to obtain initial data. The original data includes at least initial internal and external orientation element data and point data;
[0024] Specifically, first import the original data needed for block adjustment calculation. The original data mainly includes initial internal and external orientation element data, connection point data, control point data, and checkpoint data (sometimes control point data ...
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