隨著現今數位相機以及手機相機的畫素大幅提升、以及相機體積大幅的縮小，隨之而來的就是拍照時容易因手震產生模糊，而影像穩定是為了能避免或減少因手震或快門速度過慢產生的影像模糊。
本論文中，我們提出一種應用影像合成之數位影像穩定系統，使用影像處理的技術去補償影像之震動，以達到消除影像模糊的目的。此方法包含下列步驟：（1）提高ISO感度拍攝連續的四張影像；（2）取得兩張最銳利的影像；（3）計算特徵點；（4）特徵匹配；（5）旋轉影像至相同座標系統；（6）影像組合，最後得到清晰的影像。我們以實際的影像資料來進行實驗，結果顯示所提的方法是有效的。

As digital still cameras (DSC) or camera phone become smaller, cheaper and higher in resolution, photographs are increasingly prone to blurring from shaky hands. Image stabilization reduces camera shake caused by hand movement, slow shutter speeds. In this paper, we present a digital stabilization based on image composition, in which the image processing techniques is used from four source images, to compensate for camera vibrations. In general, the proposed method contains the following steps：（1）use high ISO speed to take four successive images；（2）use BSS （Best Shot Selector） to pick two shaper images；（3） find feature points；（4） match the feature points；（5） rotate the images for alignment；（6）compose the images to obtain a declared image. We have used real image data to perform experiments. The experiment results show that our image stabilization algorithm is effective.

[1] Nikon Imaging, “Nikon Imaging | Vibration Reduction,”
http://imaging.nikon.com/products/imaging/technology/vr/index.htm.
[2] R. M. Haralick and L. G. Shapiro, Computer and Robot Vision, Vol. 1, Addison Wesley, Reading, MA（1992）.
[3] Y. M. Lin,“Image Stabilization System on a Camera Module with Image Composition,” Master Thesis, Department of Computer Science and Information Engineering, National Taiwan University, Taipei, Taiwan（2006）.
[4] J. F. Chen, “Image Stabilization with Best Shot Selector and Super Resolution Reconstruction,” Master Thesis, Department of Computer Science and Information Engineering, National Taiwan University, Taipei, Taiwan（2005）.
[5] C. Harris and M. Stephens, “A Combined Corner and Edge Detector,” Proceedings of Alvey Vision Conference, pp. 147-151（1988）.
[6] Wikipedia,“Corner detection,” http://en.wikipedia.org/wiki/Corner_detection .
[7] Dan Huttenlocher ,“Corner detection,”http://www.cs.cornell.edu/courses/CS664/2008sp/, http://www.cs.cornell.edu/courses/CS664/2008sp/handouts/664%20corner%20detection.pdf.
[8]Y.Y.Chuang,“FeatureMatching, ”http://www.csie.ntu.edu.tw/~cyy/courses/vfx/05spring/lectures/handouts/lec04_feature.ppt ,（2005）.
[9] Wikipedia, “Scale-invariant feature transform,” http://en.wikipedia.org/wiki/Scale-invariant_feature_transform.
[10] Lowe, D. G.,“Object recognition from local scale-invariant features”, Proceedings of International Conference on Computer Vision, pp. 1150-1157（1999）.
[11] J.J. Koenderink, “The structure of images, ”Biological Cybernetics, Vol. 50, No. 5, pp. 363-370（1984）.
[12] T. Lindeberg, “Scale-space theory: A basic tool for analysing structures at different scales,” Journal of Applied Statistics, Vol. 21, No. 2, pp. 224-270（1994）.
[13] Po-Szu Chang, “Image Stabilization for Camera Phone,” Master Thesis, Department of Computer Science and Information Engineering, National Taiwan University, Taipei, Taiwan（2007）.
[14] M. Tico, S. Alenius, and M. Vehvilainen, “Method of Motion Estimation for Image Stabilization,” Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing, Vol. 2, No. 2, pp. 277-280（2006）.
[15] R. C. Gonzalez, R. E. Woods, and S. L. Eddins, Digital Image Processing Using MATLAB, Prentice-Hall, Upper Saddle River, New Jersey（2004）.
[16] B. F. Robert, “The RANSAC (Random Sample Consensus) Algorithm,” http://homepages.inf.ed.ac.uk/rbf/CVonline/LOCAL_COPIES/FISHER/RANSAC/.
[17] Canon, “What is Vari-Angle Prism?” http://www.canon.com/bctv/faq/vari.html.
[18] Canon, “What is Optical Image Stabilizer?” http://www.canon.com/bctv/faq/optis.html.
[19] Nikon, “Nikon Technology VR (Vibration-Reduction) ,” http://www.nikon.com/about/technology/core/software/vr_e/index.htm.
[20] Konic Minolta, “Image Field” http://www.konicaminolta.com/about/research/core_technology/picture/antiblur.html.
[21] Dpreview, “Minolta DiMAGE A1 Review 1. Introduction: Digital Photography Review,” http://www.dpreview.com/reviews/minoltadimagea1/.
[22] PENTEX, “PENTAX K10D,”http://www.pentax.com.tw/dslr/K10D/index.htm.
[23] Olympus, “Digital Image Stabilization,”
http://www.olympusamerica.com/cpg_section/dismode.asp.
[24] OpenCV, “ Welcome – OpenCV Wiki, ”
http://opencv.willowgarage.com/wiki/Welcome.
[25] Tomasi, C. and Mandulchi, R., “Bilateral Filtering for Gray and Color Images,＂ Proceedings of IEEE International Conference on Computer Vision, pp. 836-846（1998）.
[26] Durand, F. and Dorsey, J.,“Fast bilteral filtering for the display of high dynamic range image,＂Proceedings of ACM Transactions on Graphics (TOG), Vol. 21, No. 3, pp. 257-265（2002）.
[27] Edward Rosten, Tom Drummond. “Machine learning for high-speed corner detection,” Proceedings of European Conference on Computer Vision, pp. 430-443（2006）.
[28] 燕鹏、安如，「基于FAST改进的快速角点探测算法」，红外与激光工程，第三十八卷，第六期，第1104-1108頁（2009）。
[29] H. Bay, T. Tuytelaars, and L. Van Gool. “Surf: Speeded up robust features,” Proceedings of European Conference on Computer Vision, pp. 404-417（2006）.
[30] Paul Viola, Michael Jones, “Rapid object detection using a boosted cascade of simple features,” Proceedings of IEEE Conference on Computer Vision and Pattern Recognition, pp. 511-518（2001）.
[31] R. I. Hartley and A. Zisserman. Multiple view geometry in computer vision, Cambridge University Press, 2nd edition（2003）.
[32] Satya Prakash Mallick,“Feature Based Image Mosaicing,” http://cseweb.ucsd.edu/classes/fa02/cse252c/smallick.ppt .
[33] Wikipedia, “Bilinear interpolation,”http://en.wikipedia.org/wiki/Bilinear_interpolation.
[34] R. C. Gonzalez and R. E. Woods, Digital Image Processing, 2nd ed., Prentice-Hall, Upper Saddle River, New Jersey（2002）.
[35] 刘瑞祯与于仕琪， OpenCV教程 基础篇，北京航空航天大学出版社，北京（2007）。
[36] 鐘國亮，影像處理與電腦視覺，東華書局，台北（2006）。