# It seems there is a potential unresolved import issue with cv2.
# Please ensure OpenCV is installed, typically via "pip install opencv-python" for most environments.
import cv2


def to_ir(frame_bgr):
    gray = cv2.cvtColor(frame_bgr, cv2.COLOR_BGR2GRAY)
    gray = cv2.equalizeHist(gray)
    ir = cv2.applyColorMap(gray, cv2.COLORMAP_INFERNO)
    return ir