Full FOV Preview at 12 MP

Hello,

I'm trying to capture images at 12MP, but the preview is cropped to the the 4K FOV. Using a different ISP scale lets me see the whole FOV, but then I can't capture a still at the full resolution. How can I mitigate this? Just using a lower resolution overall is not an option. Any help is appreciated.

Here's the code I'm currently using:

import cv2
import depthai as dai
import numpy as np
import os
import datetime

# Create pipeline
pipeline = dai.Pipeline()

# Define ColorCamera Node
camRgb = pipeline.create(dai.node.ColorCamera)
camRgb.setBoardSocket(dai.CameraBoardSocket.CAM_A)
camRgb.setResolution(dai.ColorCameraProperties.SensorResolution.THE_12_MP) 
camRgb.setIspScale(12, 17) # I want to use (1,1) to save the still image
camRgb.setInterleaved(False)
camRgb.setPreviewSize(541,406)
camRgb.setPreviewKeepAspectRatio(True)
camRgb.setColorOrder(dai.ColorCameraProperties.ColorOrder.BGR)

# Create preview Output Stream
xoutVideo = pipeline.create(dai.node.XLinkOut)
xoutVideo.setStreamName("video")
camRgb.preview.link(xoutVideo.input)

# Create Capture Output Stream
capture = pipeline.create(dai.node.XLinkOut)
capture.setStreamName('still')
camRgb.still.link(capture.input)

# Create Control Stream
controlIn = pipeline.create(dai.node.XLinkIn)
controlIn.setStreamName('control')
controlIn.out.link(camRgb.inputControl)

# Directory for snapshots
snapshot_dir = "snapshots"
if not os.path.exists(snapshot_dir):
    os.makedirs(snapshot_dir)

# Function to take a snapshot
def take_snapshot(frame):
    # Save the snapshot
    timestamp = datetime.datetime.now().strftime("%Y%m%d_%H%M%S")
    snapshot_path = os.path.join(snapshot_dir, f"snapshot_{timestamp}.png")
    cv2.imwrite(snapshot_path, frame)
    print(f"Snapshot saved as {snapshot_path}")

def toggle_stillcapture(controlQueue, value):
    ctrl = dai.CameraControl()
    ctrl.setCaptureStill(value)
    controlQueue.send(ctrl)

# Connect to device and start pipeline
with dai.Device(pipeline) as device:
    qVideo = device.getOutputQueue(name="video", maxSize=4, blocking=False)
    qCapture = device.getOutputQueue(name="still", maxSize=30, blocking=True)
    controlQueue = device.getInputQueue("control")

    capture = False
    while True:
        if capture:
            inRgb = (
                qCapture.tryGet()
            )  # Non-blocking call, will return a new data that has arrived or None otherwise

            if inRgb is not None:
                take_snapshot(inRgb.getCvFrame())
                capture = False
                toggle_stillcapture(controlQueue, capture)

        else:
            inVideo = qVideo.get() # wait until new data has arrived
            img = inVideo.getCvFrame()
           
            cv2.imshow("Capture View", img)
            # Set the callback function for mouse events
            cv2.setMouseCallback('Capture View', draw_rectangle)

        # Check for keyboard input
        key = cv2.waitKey(1)
        if key == ord('s'):  # 's' key to save the snapshot
            capture = True
            camRgb.setIspScale(1,1)
            toggle_stillcapture(controlQueue, capture)
        elif key == ord('q'):  # 'q' key to quit
            break

cv2.destroyAllWindows()