研究生: |
高碩 Kao, Shuo |
---|---|
論文名稱: |
區塊匹配應用於雲層移動估計之全天空影像與衛星雲圖日射量估計與預測系統 Cloud motion estimation based on block matching for solar irradiance estimation and prediction with all-sky images and satellite cloud images |
指導教授: |
呂藝光
Leu, Yih-Guang |
口試委員: |
呂藝光
Leu, Yih-Guang 吳政郎 Wu, Jenq-Lang 陶金旺 Tao, Chin-Wang 鄭錦聰 Jeng, Jin-Tsong 陳松雄 Chen, Song-Shyong |
口試日期: | 2024/07/30 |
學位類別: |
碩士 Master |
系所名稱: |
電機工程學系 Department of Electrical Engineering |
論文出版年: | 2024 |
畢業學年度: | 112 |
語文別: | 中文 |
論文頁數: | 115 |
中文關鍵詞: | 衛星雲圖 、全天空影像 、粒子測速區塊匹配 、雙向長短期記憶 |
英文關鍵詞: | satellite cloud images, all-sky images, particle image velocimetry block matching, bidirectional long short-term memory |
DOI URL: | http://doi.org/10.6345/NTNU202401627 |
論文種類: | 學術論文 |
相關次數: | 點閱:107 下載:0 |
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本文透過全天空影像及衛星雲圖的分析,來開發以影像中雲層為特徵的估計與預測系統。在全天空影像中,使用紅藍比例法擷取雲層特徵影像,並提出適應式閾值在不同背景亮度的情況下更精確地判定雲層資訊計算雲層在整張圖的占比,以及太陽周圍雲特徵分析,在衛星雲圖中使用超像素分割出觀測區域雲層並利用紅藍比例法擷取雲層資訊;透過粒子測速區塊匹配推估雲層移動情形,製作未來數分鐘至小時之雲層情況,提取雲層特徵,作為雙向長短期記憶模型之輸入,而模型輸出為日射量。使用三個評估指標來檢視模型學習情形,包含相對均方根誤差、相對平均絕對誤差與預測技巧比較估計及預測成果,其中估計與預測時長 120 分鐘實驗的相對平均絕對誤差分別可達 21.99%與 34.66%。
This thesis develops irradiance estimation and prediction system using all-sky and satellite cloud images. In all sky images, the red-blue ratio method and adaptive thresholds are used to extract cloud features and analyze cloud coverage. Superpixel segmentation is applied to extract cloud features in satellite cloud images. Particle image velocimetry block matching is used to compute cloud motion. Cloud features are fed into a bidirectional long short-term memory model to forecast solar irradiance. Performance is evaluated using relative root mean square error, relative mean absolute error, and forecast skill metrics. The relative mean absolute erros of the forcasting with lead time of 2 hours and estimation are 34.66% and 21.99%, respectively.
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