def process_pipeline(frame, keep_state=True): """ Apply whole lane detection pipeline to an input color frame. :param frame: input color frame :param keep_state: if True, lane-line state is conserved (this permits to average results) :return: output blend with detected lane overlaid """ global line_lt, line_rt, processed_frames # undistort the image using coefficients found in calibration img_undistorted = undistort(frame, mtx, dist, verbose=False) # binarize the frame s.t. lane lines are highlighted as much as possible img_binary = binarize(img_undistorted, verbose=False) # compute perspective transform to obtain bird's eye view img_birdeye, M, Minv = birdeye(img_binary, verbose=False) # fit 2-degree polynomial curve onto lane lines found if processed_frames > 0 and keep_state and line_lt.detected and line_rt.detected: line_lt, line_rt, img_fit = get_fits_by_previous_fits(img_birdeye, line_lt, line_rt, verbose=False) else: line_lt, line_rt, img_fit = get_fits_by_sliding_windows(img_birdeye, line_lt, line_rt, n_windows=9, verbose=False) # compute offset in meter from center of the lane offset_meter = compute_offset_from_center(line_lt, line_rt, frame_width=frame.shape[1]) # draw the surface enclosed by lane lines back onto the original frame blend_on_road = draw_back_onto_the_road(img_undistorted, Minv, line_lt, line_rt, keep_state) # stitch on the top of final output images from different steps of the pipeline blend_output = prepare_out_blend_frame(blend_on_road, img_binary, img_birdeye, img_fit, line_lt, line_rt, offset_meter) processed_frames += 1 return blend_output
def process_pipeline(frame, keep_state=True): """ Apply whole lane detection pipeline to an input color frame. :param frame: input color frame :param keep_state: if True, lane-line state is conserved (this permits to average results) :return: output blend with detected lane overlaid """ global line_lt, line_rt, processed_frames # undistort the image using coefficients found in calibration img_undistorted = undistort(frame, mtx, dist, verbose=False) # binarize the frame s.t. lane lines are highlighted as much as possible img_binary = binarize(img_undistorted, verbose=False) # compute perspective transform to obtain bird's eye view img_birdeye, M, Minv = birdeye(img_binary, verbose=False) # fit 2-degree polynomial curve onto lane lines found if processed_frames > 0 and keep_state and line_lt.detected and line_rt.detected: line_lt, line_rt, img_fit = get_fits_by_previous_fits(img_birdeye, line_lt, line_rt, verbose=False) else: line_lt, line_rt, img_fit = get_fits_by_sliding_windows(img_birdeye, line_lt, line_rt, n_windows=9, verbose=False) # compute offset in meter from center of the lane offset_meter = compute_offset_from_center(line_lt, line_rt, frame_width=frame.shape[1]) # draw the surface enclosed by lane lines back onto the original frame blend_on_road = draw_back_onto_the_road(img_undistorted, Minv, line_lt, line_rt, keep_state) # stitch on the top of final output images from different steps of the pipeline blend_output = prepare_out_blend_frame(blend_on_road, img_binary, img_birdeye, img_fit, line_lt, line_rt, offset_meter) processed_frames += 1 return blend_output
def process_pipeline(frame, keep_state=True): """ Apply whole lane detection pipeline to an input color frame. :param frame: input color frame :param keep_state: if True, lane-line state is conserved (this permits to average results) :return: output blend with detected lane overlaid """ global line_lt, line_rt, processed_frames # step 2 # TODO 4: call undistort funcction and pass it to img_undistorted # undistort the image using coefficients found in calibration img_undistorted = undistort(frame, mtx, dist, verbose=False) # step 3 # binarize the frame s.t. lane lines are highlighted as much as possible # img_binary = binarize(img_undistorted, verbose=False) # TODO 5: Binarize img_binary = binarize_with_threshold(img_undistorted, verbose=False) # step 4 # TODO 6: Perspetive transform # perspective transform binary_warped, m, m_inv = perspective_transform(img_binary, verbose=False) # step 5 # TODO 7: Curve fitting # fit 2-degree polynomial curve onto lane lines found if processed_frames > 0 and keep_state and line_lt.detected and line_rt.detected: # Fast line fit line_lt, line_rt, img_fit = get_fits_by_previous_fits(binary_warped, line_lt, line_rt, verbose=False) else: line_lt, line_rt, img_fit = get_fits_by_sliding_windows(binary_warped, line_lt, line_rt, n_windows=9, verbose=False) # step 6 # TODO 8: Compute offset # compute offset in meter from center of the lane offset_meter = compute_offset_from_center(line_lt, line_rt, frame_width=frame.shape[1]) # step 7 # TODO 9: Final visualization # Perform final visualization on top of original undistorted image result = final_viz(img_undistorted, m_inv, line_lt, line_rt, keep_state) # step 8 # TODO 11: Blending # stitch on the top of final output images from different steps of the pipeline blend_output = prepare_out_blend_frame(result, img_binary, binary_warped, img_fit, line_lt, line_rt, offset_meter) processed_frames += 1 return blend_output