YW-Ma/SIFT_Scale_Invariant_Feature_Transform

A MATLAB implementation of Scale-Invariant_Feature_Transform(SIFT) algorithm.

Scale-invariant feature transform

• 重要提示：【我发现这个代码是有问题的，还在加工中，请大家不要参考。】
• NOTICE: Unexpected behaviors are found in execution. Please do not refer to this code!!!

Introduction

• A robust algorithm in CV to detect and describe local features in images.
• The implementations is different from the origin paper in the section of detect to make it run faster.
• For more details:
  • Wikipedia - Scale-invariant feature transform
  • UCF Computer Vision Video Lectures 2012, Dr. Mubarak Shah
  • OpenCV tutorials
  • SIFT-on-MATLAB

Pre-requisites

• MATLAB
• Patience

Usage

• Clone
• Adjust main.m to choose one-scale or multi-scale mode.
• Run
• Notice: This code is for reference only, because of the problem with the implementation of its detect section.

Results & Evaluation

• Honestly speaking, Affine-SIFT algorithm is much better than SIFT, since it simulates different angles of perspectives.
• It seems that the difference between my implementation and OpenCV's implementation is fatal problem. My candidates is much sparser!