Python：同時中斷循環

Question

我使用的代碼需要輸入圖像文件（在源文件夾中可以是任何數字）並處理它們，然后保存文件。 我正在使用while loop來保存文件。 但是我面臨的問題是，一旦循環處理完所有圖像並保存它們，它就會重新開始。 處理並保存源文件夾中的所有圖像后，如何中斷循環？

我使用的代碼是：

# construct the argument parse and parse the arguments
ap = argparse.ArgumentParser()
ap.add_argument("-i", "--images", required=True, help="path to images directory")
args = vars(ap.parse_args())

# initialize the HOG descriptor/person detector
hog = cv2.HOGDescriptor()
hog.setSVMDetector(cv2.HOGDescriptor_getDefaultPeopleDetector())

# loop over the image paths
imagePaths = list(paths.list_images(args["images"]))

#open images in a sequence
imagePaths.sort()

i =1
while True:
   for imagePath in imagePaths:
       # load the image and resize it to (1) reduce detection time
       # and (2) improve detection accuracy
       image = cv2.imread(imagePath)
       image = imutils.resize(image, width=min(700, image.shape[1]))
       orig = image.copy()

       # detect people in the image
        (rects, weights) = hog.detectMultiScale(image, winStride=(4, 4),
        padding=(8, 8), scale=1.05)

       # draw the original bounding boxes
       for (x, y, w, h) in rects:
             cv2.rectangle(orig, (x, y), (x + w, y + h), (0, 0, 255), 2)

       # apply non-maxima suppression to the bounding boxes using a
       # fairly large overlap threshold to try to maintain overlapping
       # boxes that are still people
       rects = np.array([[x, y, x + w, y + h] for (x, y, w, h) in rects])
       pick = non_max_suppression(rects, probs=None, overlapThresh=0.65)

       # draw the final bounding boxes
       for (xA, yA, xB, yB) in pick:
              cv2.rectangle(image, (xA, yA), (xB, yB), (0, 255, 0), 2)

       # show some information on the number of bounding boxes
       filename = imagePath[imagePath.rfind("/") + 1:]
       print("[INFO] {}: {} original boxes, {} after suppression".format(
        filename, len(rects), len(pick)))

       cv2.imwrite('%d.png' % (i),image)
       i +=1

Answer 1

for imagePath in imagePaths:已經遍歷數據並處理了所有內容。 沒有理由將其嵌套在另一個循環中。 刪除該循環。

...
imagePaths.sort()

i = 1
for imagePath in imagePaths:
    ...

Answer 2

while True:
    for ...:
         // your code
         // your code...
    break  // terminate while loop

在for循環的末尾添加break ，它將while True循環時終止當前

在這種情況下，您根本不需要while True 。 for循環已經迭代了所有圖像。