Worked on the opencv/opencv repository to enhance the accuracy of polygon approximation algorithms by addressing a bug in the approxPolyDP function. The solution involved correcting the distance calculation method from measuring to a line to measuring to a segment, which more accurately reflects geometric relationships in contour-based computer vision tasks. This update was implemented in C++ and included the development of a targeted regression test to validate the new point-to-segment distance logic. The work demonstrated a focus on algorithm development and unit testing, contributing to more reliable downstream applications that depend on precise contour representation in computer vision pipelines.