影像處理應用於海洋工程方面已有相當久的歷史及很多相關之研究，方法也不斷的推陳出新，本文將探討影像處理於近岸波浪觀測之應用。
在傳統影像處理上，常採用邊緣強化或遮罩的方法來偵測物體之邊界及邊緣，但這些方法並不適用於波浪影像之追蹤，本文中是採用動態輪廓模式，即廣義梯度向量流場蛇形法，來追蹤短時間內波浪之連續變化情形。我們也採用座標轉換之方式，將觀測區域由二維影像座標轉換為三維真實世界座標，以利影像之尺度分析。
本文之主要目的在於希望能夠發展一個可行的近岸波浪特性之影像分析方式，我們將實驗儀器設備架設於高雄旗後砲台，對其附近的旗津海岸公園進行攝影與測量，並將所得之影像，利用動態邊緣偵測及座標轉換等影像處理方法，進而獲得此海岸波浪淺化之相關特性。
我們由此一低成本的影像分析方式，來分析旗津海岸公園在夏季季風以及颱風期間之近岸波浪影像，在此兩種不同情況下，可獲得到良好的波浪影像追蹤結果以及和波浪相關數據，如海浪之波長、波高、波速、碎波位置等等。

The application of the image processing in ocean engineering have a long history and a lot relevant studying that the image is dealt with, this text will discuss the image processing application in nearshore wave.
This proposes to develop a feasible image analysis of nearshore wave property,we set up the instrument on Chi-Chin battery,and we will photograph and measure the park of Chi-Chin that nearby coast, and then we utilize the active contour model and coordinate transformation method on this image to get the distinction of this shore.
According this low cost analysis of image, we analyse the wave image between the duration of summer monsoon and typhoon at the Chi-Chin Coast Park. In this two different case, we can obtain the track image and the data of wave, as wavelength, wavehigh, wavespeed, location of wave breaking, and etc.

1、Abdel-Aziz, Y. I. Karara, H. M., “Direct linear transformation from
comparator coordinates into object space coordinates in close-range
photogrammetry,” in Proc. ASP/UI Symp. Close-Range Photogrammetry, Urbana,
IL, pp. 1–18, 1971
2、Berger, M.O. , Mohr, R.,“Towards autonomy in active contour models,”
International Conference on Pattern Recognition, pp. 847-851, 1990
3、Gonzalez, R. C. , Woods, R. E. , Digital Image Processing 2/e , pp.75-
147 , 2002
4、Holland, K.T. , Holman, R.A., Lippmann, T.C. , Stanley, J. , Plant, N.,
“Practical use of video imagery in nearshore oceangraphic field studies,”
IEEE Journal of Oceanic Engineering 22(1) , pp.81-91 , 1997
5、Holman, R.A. , Lippmann, T.C. , O’Neill, P.V. , Hathaway, K., “Video
estimation of subaerial beach profiles,” Marine Geology 97, pp.225–231,
1991
6、Kass, M. , Witkin, A. , Terzopoulos, D., “Snakes: active contour models,”
International Journal of Computer Vision 1(4), pp.321–331 , 1988
7、Lippmann, T. C. , Holman, R. A., “Quantification of sand bar morphology: A
video technique based on wave dissipation,”Journal of Geophysical Research
94, No. C1, pp. 995–1011, 1989
8、Neuenschwander, W.M., Fua, P., Ivenson,L., Sze´kely, G., Kübler, O.,
“Ziplock snakes,”International Journal of Computer Vision 25(3) , pp.191–
201, 1997
9、Plant, N.G., Holman, R.A., “Intertidal beach profile estimation using
video images,” Marine Geology 140 , pp.1-24 , 1997
10、Xu, C. , Prince, J. L. , “Gradient vector flow: a new external force for
snakes,” IEEE Proceedings of Computer Vision and Pattern Recognition ,
pp. 66-71, 1997
11、Xu, C. , Prince, J.L., “Generalized gradient vector flow external forces
for active contours,” Signal Processing 71(2), pp. 131-139, 1998
12、Yao, A. ,Wu, C.H., “An automated image-based technique for tracking
sequential surface wave profiles,＂Ocean Engineering 32(2), pp.157-173 ,
2004
12、林松柏 “ 傳統、小波理論與動態輪廓模式之波浪影像邊緣偵測處理”國立成功大學
碩士論文 , 2005