Python opencv和#x27之间有区别吗;s cv.GetSubRect和PIL';s.crop()?
我使用以下代码用网络摄像头拍摄了一张图像:Python opencv和#x27之间有区别吗;s cv.GetSubRect和PIL';s.crop()?,python,opencv,Python,Opencv,我使用以下代码用网络摄像头拍摄了一张图像: cv.NamedWindow("w1", cv.CV_WINDOW_AUTOSIZE) capture = cv.CaptureFromCAM(0) cv.SetCaptureProperty(capture, cv.CV_CAP_PROP_FRAME_WIDTH, 960) cv.SetCaptureProperty(capture, cv.CV_CAP_PROP_FRAME_HEIGHT, 544) def record(): frame
cv.NamedWindow("w1", cv.CV_WINDOW_AUTOSIZE)
capture = cv.CaptureFromCAM(0)
cv.SetCaptureProperty(capture, cv.CV_CAP_PROP_FRAME_WIDTH, 960)
cv.SetCaptureProperty(capture, cv.CV_CAP_PROP_FRAME_HEIGHT, 544)
def record():
frame = cv.QueryFrame(capture)
cv.ShowImage("w1", frame)
splitter(frame, 4)
我正在尝试使用cv.GetSubRect将其裁剪成更小的片段:
def splitter(image, split):
width, height = cv.GetSize(image)
x = width/split
y = height/split
# Form the 4-tuples.
img_parts = []
for y_pos in range(split):
for x_pos in range(split):
xy_section = (x_pos*x, y_pos*y, (x_pos+1)*x, (y_pos+1)*y)
# print xy_section
img_parts.append(xy_section)
# The cropping.
cropped_parts = []
for part in img_parts:
# print "part "+str(part)
cropped = cv.GetSubRect(image, part) # Error is thrown here
cropped_parts.append(cropped)
(pos_left, pos_top, width, height)
但我一直收到错误信息
OpenCV错误:cvGetSubRect文件中输入数组()的大小不正确
/build/buildd/opencv-2.3.1/modules/core/src/array.cpp,第1262行
捕获的图像大小为960x544,我将其拆分为4元组列表,其中前四个为:
- (0,0240136)
- (240,0480136)
- (480,0720,136)
- (7200960136)
对于相同大小的图像100x100,(0,50,50,100)将从原始图像的位置(0,50)开始裁剪50x100大小的区域。这样会超出原始图像大小,并引发错误。要裁剪左下角,(0,50,50,50)有效。找出问题所在。opencv和pil在裁剪中使用4元组的方式有一个关键的区别。我明天会更新答案。
(pos_left, pos_top, width, height)