我正在尝试以3840x2160
分辨率使用Logitech BRIO,当我执行python代码时,会打开一个带有摄像机图像的窗口(在3840x2160
中),但是当我保存帧时,程序在1920x1080
中创建图像。如何在4k中保存图像
高分辨率?
我正在使用opencv-python==4.1.0.25
import cv2
import time
def main(args):
CAMERA_PORT = 0
IMAGEWIDTH = 3840
IMAGEHEIGHT = 2160
#Propriedades de configuracao da camera
# 3 = width da camera, 4 = height da camera
CAMERA_PROP_WIDTH = 3
CAMERA_PROP_HEIGHT = 4
camera = cv2.VideoCapture(CAMERA_PORT)
camera.set(CAMERA_PROP_WIDTH, IMAGEWIDTH)
camera.set(CAMERA_PROP_HEIGHT, IMAGEHEIGHT)
imagePath = "/home/barbosa/Documents/camera-controller/images/image.png"
while(True):
retval, image = camera.read()
cv2.imshow('Foto',image)
k = cv2.waitKey(100)
if k == 27:
break
elif k == ord('s'):
cv2.imwrite(imagePath,image)
break
cv2.destroyAllWindows()
camera.release()
return 0
if __name__ == '__main__':
import sys
sys.exit(main(sys.argv))
答案 0 :(得分:1)
您可以制作自己的自定义尺寸调整功能来放大并保持宽高比,然后保存图像。我在IP摄像机而不是网络摄像机上对其进行了测试。
这是调整大小功能
# Resizes a image and maintains aspect ratio
def maintain_aspect_ratio_resize(image, width=None, height=None, inter=cv2.INTER_AREA):
# Grab the image size and initialize dimensions
dim = None
(h, w) = image.shape[:2]
# Return original image if no need to resize
if width is None and height is None:
return image
# We are resizing height if width is none
if width is None:
# Calculate the ratio of the height and construct the dimensions
r = height / float(h)
dim = (int(w * r), height)
# We are resizing width if height is none
else:
# Calculate the ratio of the 0idth and construct the dimensions
r = width / float(w)
dim = (width, int(h * r))
# Return the resized image
return cv2.resize(image, dim, interpolation=inter)
完整代码
import cv2
import time
# Resizes a image and maintains aspect ratio
def maintain_aspect_ratio_resize(image, width=None, height=None, inter=cv2.INTER_AREA):
# Grab the image size and initialize dimensions
dim = None
(h, w) = image.shape[:2]
# Return original image if no need to resize
if width is None and height is None:
return image
# We are resizing height if width is none
if width is None:
# Calculate the ratio of the height and construct the dimensions
r = height / float(h)
dim = (int(w * r), height)
# We are resizing width if height is none
else:
# Calculate the ratio of the 0idth and construct the dimensions
r = width / float(w)
dim = (width, int(h * r))
# Return the resized image
return cv2.resize(image, dim, interpolation=inter)
def main(args):
CAMERA_PORT = 0
IMAGEWIDTH = 3840
IMAGEHEIGHT = 2160
#Propriedades de configuracao da camera
# 3 = width da camera, 4 = height da camera
CAMERA_PROP_WIDTH = 3
CAMERA_PROP_HEIGHT = 4
camera = cv2.VideoCapture(CAMERA_PORT)
camera.set(CAMERA_PROP_WIDTH, IMAGEWIDTH)
camera.set(CAMERA_PROP_HEIGHT, IMAGEHEIGHT)
imagePath = "/home/barbosa/Documents/camera-controller/images/image.png"
while(True):
retval, image = camera.read()
cv2.imshow('Foto',image)
k = cv2.waitKey(100)
if k == 27:
break
elif k == ord('s'):
image = maintain_aspect_ratio_resize(image, width=IMAGEWIDTH)
cv2.imwrite(imagePath,image)
break
cv2.destroyAllWindows()
camera.release()
return 0
if __name__ == '__main__':
import sys
sys.exit(main(sys.argv))