如何将摄像头拍到的画面以全部的屏幕展示出，使用了Display函数还是不行
你好，可以粘贴下具体的代码和方案，使用应用实例是否有问题呢？
#二维码识别
#!/usr/bin
from hobot_dnn import pyeasy_dnn as dnn
from hobot_vio import libsrcampy as srcampy
import cv2
import time
import numpy as np
import os
from pyzbar import pyzbar
def get_display_res():
if os.path.exists(“/usr/bin/8618_get_edid”) == False:
return 1920, 1080
import subprocess
p = subprocess.Popen([“/usr/bin/8618_get_edid”], stdout=subprocess.PIPE)
result = p.communicate()
res = result[0].split(b’,')
res[1] = max(min(int(res[1]), 1920), 0)
res[0] = max(min(int(res[0]), 1080), 0)
return int(res[1]), int(res[0])
def bgr2nv12_opencv(image):
height, width = image.shape[0], image.shape[1]
area = height * width
yuv420p = cv2.cvtColor(image, cv2.COLOR_BGR2YUV_I420).reshape((area * 3 // 2,))
y = yuv420p[:area]
uv_planar = yuv420p[area:].reshape((2, area // 4))
uv_packed = uv_planar.transpose((1, 0)).reshape((area // 2,))
nv12 = np.zeros_like(yuv420p)
nv12[:height * width] = y
nv12[height * width:] = uv_packed
return nv12
capture = cv2.VideoCapture(0)
# capture.set(cv2.CAP_PROP_FRAME_WIDTH,360)
# capture.set(cv2.CAP_PROP_FRAME_HEIGHT,360)
if __name__==‘__main__’:
disp1 = srcampy.Display()
disp_w, disp_h = get_display_res()
ret1 = disp1.display(0, disp_w, disp_h, 0, 1)
disp2 = srcampy.Display()
ret2 = disp2.display(0, disp_w, disp_h, 0, 1)
while capture.isOpened():
# 首先我们要用刚才实例化的摄像头来采集实时的照片，
_, frame = capture.read()
frame_resize = cv2.resize(frame, (disp_w, disp_h), interpolation=cv2.INTER_AREA)
nv12_data = bgr2nv12_opencv(frame_resize)
ret1 = disp1.set_img(nv12_data.tobytes())
# 用pyzbar的函数解析图像里的二维码和条形码
test = pyzbar.decode(frame)
# 循环检测到的条形码
for tests in test:
disp1.close()
# 获取到的条形码数据转换成字符串
testdate = tests.data.decode(‘utf-8’)
# 获取条形码类型
testtype = tests.type
# 绘出图像上条形码的数据和条形码类型
printout = “{}”.format(testdate)
src = cv2.imread(‘/home/sunrise/python/white.webp’)
#img = src[0:200, 0:200]
# 调用cv.putText()添加文字
if len(printout) >= 4:
text1 = printout.split(“+”)
text = text1[0] + “4” + text1[1]
else:
text = printout
print(text)
AddText = src.copy()
res = cv2.putText(AddText, printout, (300, 300), cv2.FONT_HERSHEY_COMPLEX, 5, (0, 0, 0), 5)
img_resize=cv2.resize(res,(disp_w,disp_h),interpolation=cv2.INTER_AREA)
nv12_data=bgr2nv12_opencv(img_resize)
ret2=disp2.set_img(nv12_data.tobytes())
# 显示预览窗口
#cv2.imshow(‘Scanning’, frame)
# 按q退出
key=cv2.waitKey(1)
print(key)
if key==27:
disp2.close()
exit(-1)
key=cv2.waitKey(1)
if key==27:
break
disp2.close()
# 释放摄像头
capture.release()
# 释放所有显示窗口
cv2.destroyAllWindows()
这个代码可以先打开全屏摄像头拍到的数据，但是，一旦拍到二维码之后就直接结束了，而我想要让他全屏显示出二维码的数字
并且，这个我按下了Esc后，也没有任何反应
代码运行到那里结束了呢？
#二维码识别-
#!/usr/bin-
from hobot_dnn import pyeasy_dnn as dnn-
from hobot_vio import libsrcampy as srcampy-
import cv2-
import time-
import numpy as np-
import os-
from pyzbar import pyzbar-
def get_display_res():-
if os.path.exists(“/usr/bin/8618_get_edid”) == False:-
return 1920, 1080-
import subprocess-
p = subprocess.Popen([“/usr/bin/8618_get_edid”], stdout=subprocess.PIPE)-
result = p.communicate()-
res = result[0].split(b’,')-
res[1] = max(min(int(res[1]), 1920), 0)-
res[0] = max(min(int(res[0]), 1080), 0)-
return int(res[1]), int(res[0])-
def bgr2nv12_opencv(image):-
height, width = image.shape[0], image.shape[1]-
area = height * width-
yuv420p = cv2.cvtColor(image, cv2.COLOR_BGR2YUV_I420).reshape((area * 3 // 2,))-
y = yuv420p[:area]-
uv_planar = yuv420p[area:].reshape((2, area // 4))-
uv_packed = uv_planar.transpose((1, 0)).reshape((area // 2,))-
nv12 = np.zeros_like(yuv420p)-
nv12[:height * width] = y-
nv12[height * width:] = uv_packed-
return nv12-
capture = cv2.VideoCapture(0)-
# capture.set(cv2.CAP_PROP_FRAME_WIDTH,360)-
# capture.set(cv2.CAP_PROP_FRAME_HEIGHT,360)-
if __name__==‘__main__’:-
disp1 = srcampy.Display()-
disp_w, disp_h = get_display_res()-
ret1 = disp1.display(0, disp_w, disp_h, 0, 1)-
disp2 = srcampy.Display()-
ret2 = disp2.display(0, disp_w, disp_h, 0, 1)-
while capture.isOpened():-
# 首先我们要用刚才实例化的摄像头来采集实时的照片，-
_, frame = capture.read()-
frame_resize = cv2.resize(frame, (disp_w, disp_h), interpolation=cv2.INTER_AREA)-
nv12_data1 = bgr2nv12_opencv(frame_resize)-
ret1 = disp1.set_img(nv12_data1.tobytes())-
# 用pyzbar的函数解析图像里的二维码和条形码-
test = pyzbar.decode(frame)-
print(test)-
if test!=:-
disp1.close()-
print(1)-
# 循环检测到的条形码-
for tests in test:-
# 获取到的条形码数据转换成字符串-
testdate = tests.data.decode(‘utf-8’)-
# 获取条形码类型-
testtype = tests.type-
# 绘出图像上条形码的数据和条形码类型-
printout = “{}”.format(testdate)-
src = cv2.imread(‘/home/sunrise/python/white.webp’)-
#img = src[0:200, 0:200]-
# 调用cv.putText()添加文字-
if len(printout) >= 4:-
text1 = printout.split(“+”)-
text = text1[0] + “4” + text1[1]-
else:-
text = printout-
print(text)-
AddText = src.copy()-
print(2)-
res = cv2.putText(AddText, printout, (300, 300), cv2.FONT_HERSHEY_COMPLEX, 5, (0, 0, 0), 5)-
print(3)-
img_resize=cv2.resize(res,(disp_w,disp_h),interpolation=cv2.INTER_AREA)-
print(4)-
nv12_data2=bgr2nv12_opencv(img_resize)-
print(5)-
ret2=disp2.set_img(nv12_data2.tobytes())-
print(6)-
# 显示预览窗口-
#cv2.imshow(‘Scanning’, frame)-
# 按q退出-
key=cv2.waitKey(1)-
if key==113:-
break-
disp2.close()-
# 释放摄像头-
capture.release()-
# 释放所有显示窗口-
cv2.destroyAllWindows()-
然后，输出的结果是
1
1234321
2
3
4
5
Segmentation fault
多次调用disp模块，去掉前面的，然后看一下数据是否对齐