why an image do not have exif data. about gphotos-sync

[gilesknap]

please can you try dropping an image in here https://onlineexifviewer.com/
if that shows no exif, please download your image direct from google photos web and check again.

Thanks

[Saba-Nawaz]

I am capturing the image from the webcam, and after that, I am trying to get the location. when I drop the image on https://onlineexifviewer.com/ it has no exif data too. I don't know how to solve it.

this is the code for image capturing
cap = cv2.VideoCapture(0)
images = []
global imgname
#check if connection with camera is successfully
if cap.isOpened():
ret, frame = cap.read() #capture a frame from live video
# Cut down frame to 250x250px
frame = frame[120:120+250,200:200+250, :]

l_b=np.array([0,230,170])# lower hsv bound for red
u_b=np.array([255,255,220])# upper hsv bound to red

#check whether frame is successfully captured
if ret:
    # continue to display window until 'q' is pressed
    while(True):
        if cv2.waitKey(1) & 0XFF == ord('a'):
            
            # Create the unique file path 
            imgname = os.path.join(ANC_PATH, '{}.jpg'.format(uuid.uuid1()))
            # Write out anchor image
            
            images.append(imgname)
            
            cv2.imwrite(imgname, frame)
            
          # Collect positives
        if cv2.waitKey(1) & 0XFF == ord('p'):
            # Create the unique file path 
            imgname = os.path.join(POS_PATH, '{}.jpg'.format(uuid.uuid1()))
            images.append(imgname)
            print(imgname)
            
            # Write out positive image
            cv2.imwrite(imgname, frame) 
          
        cv2.imshow("Frame",frame)   #show captured frame
        
        #press 'q' to break out of the loop
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
#print error if frame capturing was unsuccessful
else:
    print("Error : Failed to capture frame")
# Release the webcam
cap.release()
# Close the image show frame
cv2.destroyAllWindows()

print error if the connection with camera is unsuccessful

else:
print("Cannot open camera")

[gilesknap]

Just to be clear here:

• you are not asking about this project gphoto-sync, you are asking about your own code?
• you are using OpenCV to capture images from a webcam?

[Saba-Nawaz]

yes, I am asking about my project.
yes I am openCV to capture images from a webcam

[gilesknap]

I'm afraid you have come to the wrong place as I have never used OpenCV. I'm of the opinion that it does not create exif because it treats images as NumPy arrays. So you would need to construct your own metadata.
This article seems to confirm my thoughts https://learnopencv.com/what-is-exif-data-in-images/

[Saba-Nawaz]

Thanks for sharing the article.