用于Python中视频的Regionprops(skimage.measure)

时间:2018-03-05 17:13:42

标签: python-3.x video-processing labels region

我在互联网上获得了一段代码'Label image regions',并尝试在视频上运行它,但我得到的只是第一帧而不是关闭第一帧窗口后的错误“max()arg是我的代码的“从行”plt.tight_layout()的空序列。我试图获取我的视频中的所有帧的标签,而不是单个图像示例,如上面给出的示例所示(链接)。基本上代码应该显示/绘制带标签的所有帧。

任何帮助都非常有用。请在下面找到我的代码

import cv2
import numpy as np
from matplotlib import pyplot as plt
import time
import matplotlib.patches as mpatches

from skimage import data
from skimage.filters import threshold_otsu
from skimage.segmentation import clear_border
from skimage.measure import label, regionprops
from skimage.morphology import closing, square
from skimage.color import label2rgb


cap =  cv2.VideoCapture('test3.mp4')
fig, ax = plt.subplots(figsize=(10, 6))

while(1):
    t = time.time()
    ret, frame2 = cap.read()
    image = cv2.cvtColor(frame2, cv2.COLOR_BGR2GRAY)
    thresh = threshold_otsu(image)
    bw = closing(image > thresh, square(3))

    # remove artifacts connected to image border
    cleared = clear_border(bw)

    # label image regions
    label_image = label(cleared)
    image_label_overlay = label2rgb(label_image, image=frame2)
    x = regionprops(label_image)
    area2 = [r.area for r in x]
    print(area2)
    ax.imshow(image_label_overlay)

    for region in regionprops(label_image):
        # take regions with large enough areas
        if region.area >= 100:
           # draw rectangle around segmented coins
            minr, minc, maxr, maxc = region.bbox
            rect = mpatches.Rectangle((minc, minr), maxc - minc, maxr -minr,
                                   fill=False, edgecolor='red', linewidth=2)
            ax.add_patch(rect)

    ax.set_axis_off()
    plt.tight_layout()
    plt.show()

    if cv2.waitKey(1) & 0xFF == ord('q'):
        break
 cap.release()
 cv2.destroyAllWindows()

1 个答案:

答案 0 :(得分:0)

瓦沃里亚!

解决方案是:

1。)错误纠正:&#34; max()arg是一个空序列&#34; ,可以使用< plt.tight_layout() 删除<强> fig.tight_layout 而不是 plt.tight_layout 。因为在我关闭视频的第一帧之后(那不是更新,以及我仍在思考的另一个问题!!)这个数字是空的,它引发了一个例外,因为 {{1}试图在一个空虚的身影上运行。

2。)如果替换行

,则可以运行Label image regions视频代码
tight.layout

    rect = mpatches.Rectangle((minc, minr), maxc - minc+50, maxr - minr+50,fill=False, edgecolor='red', linewidth=2)
    ax.add_patch(rect)
    ax.set_axis_off()
    plt.tight_layout()
    plt.show()

基本上以简单的Capture Video from Camera Python程序显示视频。