如何使用Python Google Colab将带有边框的图像存储在文件夹中？

如何解决如何使用Python Google Colab将带有边框的图像存储在文件夹中？

我试图在检测到人脸后保存它们。我尝试使用matplotlib.pyplot.savefig（img，bbox_inches ='tight'，pad_inches = 0）和此存储的图像，但存储的所有图像都是空白的白色图像。 The output I get

我要存储的是：- The Output I expect

#face detection with mtcnn on a photograph
from matplotlib import pyplot
from mtcnn.mtcnn import MTCNN
from matplotlib.patches import Rectangle
from matplotlib.patches import Circle
import glob
import cv2
import matplotlib
# draw an image with detected objects
def draw_image_with_boxes(filename,result_list):
    # load the image
    data = pyplot.imread(filename)
    # plot the image
    pyplot.imshow(data)
    # get the context for drawing boxes
    ax = pyplot.gca()
    # plot each box
    for result in result_list:
        # get coordinates
        x,y,width,height = result['box']
        # create the shape
        rect = Rectangle((x,y),height,fill=False,color='red')
        # draw the box
        ax.add_patch(rect)
        # draw the dots on eyes nose ..
        #for key,value in result['keypoints'].items():
            # create and draw dot
            #dot = Circle(value,radius=2,color='red')
            #ax.add_patch(dot)
    # show the plot
    pyplot.show()
    
#filename = '/content/drive/My Drive/images/*.jpg'
i = 1
for filename in glob.glob('/content/drive/My Drive/images/*.jpg'):
   pixels = cv2.imread(filename)

   # load image from file
   #pixels = pyplot.imread(filename)
   # create the detector,using default weights
   detector = MTCNN()
   # detect faces in the image
   faces = detector.detect_faces(pixels)
   # display faces on the original image
   new = draw_image_with_boxes(filename,faces)
   img = '/content/drive/My Drive/boundingBox' + '/image_' + str(i) + '.jpg'
   
   matplotlib.pyplot.savefig(img,bbox_inches='tight',pad_inches=0)
   
   i+=1
print("Done")

解决方法

所以不是

pixels = cv2.imread(filename)

您应该放

pixels = pyplot.imread(filename)

我猜这是一个语法错误。

也可以将其从for循环中删除

matplotlib.pyplot.savefig(img,bbox_inches='tight',pad_inches=0)

然后在定义的draw_image_with_boxes(filename,result_list)函数中，在“显示绘图”注释之后添加以下代码行。

pyplot.savefig('/content/drive/My Drive/TESTBBOX/' + 'image'+ str(i)+'.jpg',bbox_inches='tight')