successive frames 中文意思是什麼
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Since the partition between successive frames may not be apparent for film of astrophotographs, taking a daytime photo or a flash photo before start is recommended to fix the first frame
由於天文底片很多時候都見不到每幅的間格，因此最好利用第一格拍攝日間景色或用閃燈拍攝任何景物，以定格位。 -
At the cinema we see successive photographs projected on a screen at the rate of twenty-four frames per second.
在電影院，我們看到的是以每秒鐘24幅畫面的速度投射到銀幕上的連續照片。 -
A linear house with eight successive rooms along a hallway with an alcove filled with begonias where the women in the family would sit to embroider on frames and talk in the cool of the evening
沿著走廊，八間屋子一字排開，外帶一個種滿海棠花的涼亭，在那裡女眷們可以坐著繡花和在夜晚的涼風中交談。 -
However, most of the current wireless networks still work in low bandwidths, and mobile devices still suffer from weak computational power, short battery lifetime and limited display capability. therefore, this thesis deals with developing a very low bit - rate bi - level video coding technique, which can be used in video communications almost anywhere, anytime on any device as follows : ( 1 ) convert true color video sequences from ccd and video card to grayscale ones, ( 2 ) detect static region of successive frames by the sum of absolute differences ( sad ) and update current frame using static region of previous frame, to decrease flicker. ( 3 ) threshold the images to bi - level video sequences using ridler ' s iterative selection
為此，本論文在傳統h . 26x和mpeg - x等視頻編解碼技術的基礎上提出了一種新的基於輪廓的視頻編解碼方案，步驟如下： （ 1 ）先把從ccd攝像頭捕捉到的視頻幀序列轉換成灰度幀序列， （ 2 ）在灰度幀序列的基礎上通過sad演算法找出相鄰幀的靜態區域，用前一幀的靜態區域更新當前幀的相應區域，這樣可以降低畫面閃爍， （ 3 ）然後用灰度直方圖迭代所產生的閾值二值化圖像，生成基於輪廓的視頻幀序列， （ 4 ）最後運用基於上下文的算術編碼技術對由第三步生成的二值化視頻幀序列進行算術編碼。 -
In the section of temporal segmentation, construct the stationary panoramic background first. we need get every frame of the shot at first, and get the motion vectors of every frame, and calculate the motion parameters. use the motion parameters, we can get the transformation of successive frames, and then get transformation of every two frames
當獲得了背景的全景圖后，就可以用經過校準的各幀圖像和背景相關部分進行差分運算，則該幀圖像中背景部分相減后為零，運動目標部分非零，從而得到非零區域就獲得了該幀中運動目標所在的區域。 -
Following are detailed steps of this system : in the segmentation section, we use three successive frames to detect the motion infomation of the pictures, by using blockmatching algorithm in two successive frames twice, we can get two pictures composed of motion blocks of the moving object, then we find out the common motion blocks of the two pictures, experiments prove these blocks approximately compose the moving object. after getting the motion blocks, we calculate the center of these blocks as the center of the moving object, thus we can use the center point as the origin, construct n straight linesjoining the boundry of the image and the center. on each line, we can find out a proper point near the object contour according to some criteria, then we use these n points as the initial points of the snake and let the snake converge on the object contour, thus finish the segmentation of the moving object
本方案的實現過程為：分割部分：對運動目標的前後三幀進行兩次塊匹配運動檢測，通過找出兩個匹配結果中運動圖像塊的公共部分，獲得組成運動目標的圖像塊；求出運動目標圖像塊的形心作為運動目標的中心，以此中心為端點，向四周發散出角度間隔為的n條射線，射線的另一端終止於圖像的邊緣；在每條射線上按照一定的準則（點的梯度和與目標中心的距離在一定閾值范圍內）找出n個初始輪廓點；以這些初始輪廓點作為主動輪廓模型（ snake ）的初始點，用改進的貪婪演算法使snake收斂到待分割的運動目標輪廓上。
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