1 INTRODUCTION
2 ALGORITHM
2.1 Outline of the PDT
2.2 Selection of Clusters of Light-Curves
2.3 Determination and Removal of Trends
3 TEST WITH SYNTHETIC LIGHT-CURVES
3.1 Data Description
3.2 Identification of Clusters of Template Stars
3.3 De-trending Results and Comparison with TFA
3.4 Second Order Extinction and Other Considerations
4 TEST WITH ASTRONOMICAL DATASETS
4.1 An Example of TAOS Dataset
4.2 An Example of Megacam Dataset
5 NOTES AND FUTURE WORK
6 CONCLUSION