Question

我读了一段灰度的视频。我在视频的每一帧上标记了一个圆形轮廓，并尝试记录该轮廓上每个像素的强度：

    frameCount += 1
    currentTimestamp = timestamp + frameCount/fps 
    file = open("myRecord.txt", "a+") #a+ to append to file
    file.write(str(currentTimestamp))
    circleSegment = get_circle_segment(center_pt, 60, 360) #this function returns a list of tuples, where each tuple (x,y) contains x- and y-coordinates of a point along the circular contour
    for el in circleSegment: 
        pixel = gray_frame[el[1],el[0]]
        #log information 
        file.write('\t' + str(pixel))
    file.write('\n')
    file.close()

这非常适合最大180°甚至更大的圆弧（我也测试了181°）。但是，一旦我超出某个值，例如270°或359°或360°（一个完整的圆，这就是我想要的），所记录的数据仅包含汉字。

我不知道什么可能导致此问题！我的txt文件超过1000 KB会出问题吗？

注释后，此代码有效：

 frameCount += 1
    currentTimestamp = timestamp + frameCount/fps 
    storeData = []
    storeData.append(currentTimestamp)
    circleSegment = get_circle_segment(center_pt, 60, 360) 
    for el in circleSegment: 
        pixel = gray_frame[el[1],el[0]]
        storeData.append(pixel)

    #log information 
    file = open("myRecord.txt", mode="a+") #a+ to append to file
    for element in storeData:
        file.write('\t' + str(element))
    file.write('\n')
    file.close ()

Python：记录视频文件中的像素强度值

0 个答案: