I want to create barrel and pincushion distortion effect in MTK phones,and get useful helps from here and here. But i can't understand formulas used in functions of getRadialX、getRadialY and calc_shift although have achieved barrel distortion effect. I hope someone can help me to achieve pincushion effect or explain formulas used in those functions. Thank you!
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Perhaps http://stackoverflow.com/questions/6199636/formulas-for-barrel-pincushion-distortion/6227310#6227310 – Dr. belisarius Nov 07 '11 at 05:55
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Thanks for you help, but the answer you mentioned is not a good solution, i still try to solve it. Maybe opencv or gimp can help me, thank you. – SimpleSu Nov 07 '11 at 15:35