[Python] How to get numbers from image using open cv?

I'm trying to figure out the numerical values from the image.multi-digit numbers are fine, but there is a problem with single-digit numbers. It won't show or find them at all. I can't figure out the problem.

def monitor_area():
global bbox
while True:
if bbox is None:
print("Žiadna oblasť nebola vybraná. Monitorovanie nemôže začať.")
return

# Získa snímku obrazovky vybranej oblasti
screenshot = ImageGrab.grab(bbox)

# Predspracovanie obrázka (zvýšenie kontrastu a jasu)
screenshot = preprocess_image(screenshot)

screenshot_np = np.array(screenshot)

# Detekcia textu pomocou EasyOCR
results = reader.readtext(screenshot_np)

# Vypíšeme všetky detegované výsledky pre diagnostiku
print("Výsledky OCR: ")
for (detected_bbox, text, prob) in results:
print(f"Detected text: '{text}', Probability: {prob}")

# Detekcia a pokus o filtrovanie čísel, pridajme tu len diagnostiku
detected_numbers = [text for (detected_bbox, text, prob) in results if prob > 0.4]

if detected_numbers:
try:
number = int(detected_numbers[0].strip()) # Pokus o prevod prvého textu na číslo
print(f"Detected number: {number}")
update_button_colors(number)
except ValueError:
print(f"Detegovaný text nie je číslo: {detected_numbers[0]}")

time.sleep(0.3)


Could someone advise me how to solve this?

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