image centroid 中文意思是什麼
image centroid
解釋
像矩心-
A new standardization method is proposed to solve the problem of the distorted image recognition, which is that the image ' s centroid was gotten based on the pixels total value of the whole image, and then the largest apothem and the rotated angle were obtained by the distance of the centroid and the image brim, last the object and the reference image adjusted the entirely same images in the scale and the rotated angle according to the uniform standardization
由此，提出了基於圖像質心和最長邊的歸一化圖像處理新演算法：根據圖像像素總值求取圖像質心，根據質心和圖像邊緣輪廓點之間的長度求出圖像的最長邊和旋轉角度，然後根據統一標準將目標圖像和參考圖像調整至同一長度和旋轉方向的完全相同的圖像。 -
At the doppler centroid aspect, this paper make use of maximum value method ; energy method and autocorrelation function method to estimate doppler centroid. at the doppler frequency aspect, this paper make use of image offset method ; time - frequency method ; minimum entropy and fractional fourier transformation method to estimate doppler frequency rate
在多普勒參數估計中，採用了最大值法、能量法和自相關函數法進行多普勒中心頻率估計;採用了圖像偏移法、時頻分析法、最小熵法和分數階傅里葉變換法進行多普勒調頻斜率估計。 -
Abstract : the characteristics of wavelet transform and its significance in image edge extraction are presented. the detailed steps for the extended target centroid calculation with wavelet transform are described. extracting target ( airplane ) centroid coordinates when airplane images are in the background noise conditions with different image fuzzy degrees by using wavelet transform, the extracting accuracy for target centroid coordinates under the different image fuzzy degrees and background noise conditions are compared. the application prospect of wavelet transform in the extended target tracking is shown
文摘:介紹了小波變換的特點及其在圖象邊緣提取中的意義，說明了擴展目標用小波變換進行目標形心計算的詳細步驟，並以飛機圖象為目標在不同圖象模糊程度及背景噪音情況下用小波變換進行了目標形心坐標提取，比較了不同圖象模糊程度及背景噪音情況下目標形心坐標提取的精度，展示了小波變換在擴展目標跟蹤技術中應用的前景。 -
To effectively extract edges, edge pixels are classified according to the difference of intensity distribution, and multiple effective edge features are defined. edges are detected by applying fuzzy reasoning ( min - max centroid method ), based on local image edge characteristics
該方法在重新定義邊緣特徵的基礎上，引入模糊推理理論，從而形成了基於多邊緣特徵和模糊推理的邊緣檢測方法。 -
Centroid : the " center of gravity " of the image of an object, defining the position of the object with subpixel precision
質心：圖片中一個目標的「質心」 ，精確到比像素更高一級。 -
In order to acquire 3d spatial position and motion parameters of moving target, the limitation of second focus method to get the depth of target is analyzed according to perspective projection model of target centroid. then, the constraint for obtaining 3d position and motion parameters of moving target centroid from monocular image sequence is presented and proved in this paper. with this constraint, a nonlinear extended kalman filter algorithm for estimating 3d spatial position and motion parameters of moving target centroid from monocular image sequence is proposed
進一步，為獲取目標的空間位置和運動參數等三維信息，在目標和成像系統都運動的情況下，根據目標質心的透視投影成像模型，首先分析了二次成像法獲取目標深度信息的缺陷；然後給出了由單目序列圖像獲取目標質心的空間位置和運動參數的條件，並提出利用多幀單目序列圖像和應用非線性擴展卡爾曼濾波演算法來估計目標質心的空間位置和運動參數；最後對提出的估計方法進行了多組模擬驗證，證明該方法可行有效。 -
The design of the laser and its bracket, neutral density filters, lens, and digital camera are complete in the hardware design ; the image collection and centroid calculation are complete in the software design ; and the experiment of straightness calibration is accomplished. the possible errors are analyzed about the whole system, and some methods to decrease the errors are put forward
硬體部分主要完成了激光器及其支架、衰減片組、透鏡組和數字相機的結構設計;軟體部分主要完成了圖像的採集和質心的求取;最後進行了直線性校準實驗，並對實驗過程進行了誤差分析，提出了減小誤差的方法。 -
Then 2d characteristics in image space are acquired, such as position of target centroid
至此得到了目標質心在圖像空間的位置等二維特徵信息。
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