I am developing a GUI of 4 using Basler cameras. Within my program, I am facing two problems that cause the GUI to fail to run properly. However, The main goal is to save 4 images based on the camera index. I was told to use the multi-threading technique to develop the GUI, and these are the problems I encountered. These are the codes:
def LiveThread(strIdx):
CamIdx = int(strIdx)
try:
panel[CamIdx] = None
image[CamIdx] = []
# Start Grabbing
camera[CamIdx].StartGrabbing(pylon.GrabStrategy_LatestImageOnly)
print("Cam",CamIdx,': Start Grabbing')
iterator = 0
while bLiveThraed[CamIdx]:
grabResult = camera[CamIdx].RetrieveResult(5000, pylon.TimeoutHandling_ThrowException)
if grabResult.GrabSucceeded():
image[CamIdx] = converter[CamIdx].Convert(grabResult) # Access the openCV image data
image[CamIdx] = image[CamIdx].GetArray() # change them to an array for easy access
if(image[CamIdx] != []):
image[CamIdx] = cv2.cvtColor(image[CamIdx], cv2.COLOR_BGR2RGB)
image[CamIdx] = cv2.resize(image[CamIdx], (345,270))
image[CamIdx] = ImageTk.PhotoImage(image = Image.fromarray(image[CamIdx]))
if panel[CamIdx] is None:
panel[CamIdx] = tk.Label(image=image[CamIdx])
panel[CamIdx].image = image[CamIdx]
panel[CamIdx].pack(side="left")
panel[CamIdx].place(x=(345*CamIdx)+(20*CamIdx)+20, y=100)
panel[CamIdx] = tk.Label(image=image[CamIdx])
panel[CamIdx].image = image[CamIdx]
panel[CamIdx].pack(side="bottom")
panel[CamIdx].place(x=(345*CamIdx)+(20*CamIdx)+20, y=400)
#cv2.imwrite('./trial/camera'+str(CamIdx)+str(iterator)+'.jpg', image[CamIdx])
#iterator +=1
else:
panel[CamIdx].configure(image=image[CamIdx])
panel[CamIdx].image = image[CamIdx]
else:
print("Error: ", grabResult.ErrorCode)
grabResult.Release()
except genicam.GenericException as e:
# Error handling
print("An exception occurred.", e.GetDescription())
- The deprecated warning is displayed in the following image
- The problem of saving every image corresponding to its camera index like camera00, camera10, camera20, camera30 after executing the
cv2.imwrite('./trial/camera'+str(CamIdx)+str(iterator)+'.jpg', image[CamIdx])
. The resulting error is given in the following image.
The resulting GUI is as shown in the image attached below.
In below code, the last line assign
image[CamIdx]
from opencv image to becomeImageTk.PhotoImage
which cv2 can not write down. Consider storingimage[CamIdx]
to another varible before assigningimage[CamIdx] = ImageTk.PhotoImage(image = Image.fromarray(image[CamIdx]))
.To
For the deprecation warning, in case the OP want to check for None image, as Christoph Rackwitz pointed out in the comments:
don't use [] as a sentinel. use None. test with is None, not equality comparison.