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Fix image orientation in recv_raw_rolling.py - correct 180deg rotation and flip

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yair 2025-11-15 00:35:49 +02:00
parent bdb89b2632
commit d3ee5d998e
1 changed files with 10 additions and 7 deletions
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17
scripts/recv_raw_rolling.py
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@ -163,15 +163,15 @@ while True:
# Input is 2456 pixels wide x 1 pixel tall, we want it as 2456 tall x 1 wide
frame = np.frombuffer(data, dtype=np.uint8).reshape((COLUMN_HEIGHT, COLUMN_WIDTH, CHANNELS))
# Transpose to make it vertical: (1, 2456, 3) -> (2456, 1, 3)
column = frame.transpose(1, 0, 2)
# Transpose to vertical and flip to correct 180-degree rotation: (1, 2456, 3) -> (2456, 1, 3) flipped
column = frame.transpose(1, 0, 2)[::-1]
# Insert the single column into the rolling buffer at the current position
# This happens for EVERY received frame
# Rolling from right to left to correct horizontal flip
rolling_buffer[:, current_column:current_column+1, :] = column
# Move to the next column position, wrapping around when reaching the end
current_column = (current_column + 1) % DISPLAY_WIDTH
# Move to the next column position (right to left), wrapping around when reaching the start
current_column = (current_column - 1) % DISPLAY_WIDTH
# Display throttling: only refresh display at specified rate
# This reduces cv2.imshow() / cv2.waitKey() overhead while keeping all data
@ -184,12 +184,15 @@ while True:
should_display = False
if should_display:
# Flip horizontally for display to correct orientation (using efficient slicing)
display_buffer = rolling_buffer[:, ::-1]
# Display the rolling buffer (clean, no overlays)
cv2.imshow("Rolling Column Stream", rolling_buffer)
cv2.imshow("Rolling Column Stream", display_buffer)
# Write frame to video if recording
if video_writer is not None:
video_writer.write(rolling_buffer)
video_writer.write(display_buffer)
if cv2.waitKey(1) == 27: # ESC to quit
break