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Refactor feature extraction to utilize transformed frames in VideoEditor

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This commit enhances the feature extraction process by ensuring that features are extracted from the transformed frame that users see, accounting for all transformations such as cropping, zooming, and rotation. It simplifies the coordinate mapping logic, allowing for accurate feature tracking without the need for manual coordinate adjustments. Feedback messages have been updated to reflect the extraction from the visible area, improving user experience.
This commit is contained in:
PhatPhuckDave
2025-09-26 13:40:10 +02:00
parent 43d350fff2
commit aaf78bf0da
1 changed files with 24 additions and 47 deletions
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69
croppa/main.py
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@@ -1244,15 +1244,12 @@ class VideoEditor:
# Only extract if we don't already have features for this frame
if self.current_frame not in self.feature_tracker.features:
# Extract features from the cropped region of the original frame
if self.crop_rect:
x, y, w, h = self.crop_rect
cropped_frame = self.current_display_frame[y:y+h, x:x+w]
if cropped_frame.size > 0:
self.feature_tracker.extract_features(cropped_frame, self.current_frame)
else:
# No crop - extract from full frame
self.feature_tracker.extract_features(self.current_display_frame, self.current_frame)
# Extract features from the transformed frame (what user sees)
# This handles all transformations (crop, zoom, rotation) correctly
display_frame = self.apply_crop_zoom_and_rotation(self.current_display_frame)
if display_frame is not None:
# Extract features without coordinate mapping - store in transformed frame coordinates
self.feature_tracker.extract_features(display_frame, self.current_frame)
def jump_to_previous_marker(self):
"""Jump to the previous tracking marker (frame with tracking points)."""
@@ -1518,15 +1515,11 @@ class VideoEditor:
if self.feature_tracker.tracking_enabled:
feature_pos = self.feature_tracker.get_tracking_position(frame_number)
if feature_pos:
# Features are in cropped coordinate space, need to map to original frame coordinates
if self.crop_rect:
crop_x, crop_y, crop_w, crop_h = self.crop_rect
# Map from cropped coordinates to original frame coordinates
orig_x = feature_pos[0] + crop_x
orig_y = feature_pos[1] + crop_y
else:
# No crop - coordinates are already in original frame space
orig_x, orig_y = feature_pos[0], feature_pos[1]
# Features are stored in transformed frame coordinates
# We need to map them to rotated frame coordinates for the tracking system
# The transformed frame coordinates are already in the correct space for display
# But we need to map them back to the original frame space first
orig_x, orig_y = self._map_transformed_to_original_coords(feature_pos[0], feature_pos[1])
# Transform to rotated frame coordinates
rot_x, rot_y = self._map_original_to_rotated_coords(orig_x, orig_y)
@@ -2314,17 +2307,10 @@ class VideoEditor:
self.current_frame in self.feature_tracker.features):
feature_positions = self.feature_tracker.features[self.current_frame]['positions']
for (fx, fy) in feature_positions:
# Features are in cropped coordinate space, need to map to original frame coordinates
if self.crop_rect:
crop_x, crop_y, crop_w, crop_h = self.crop_rect
# Map from cropped coordinates to original frame coordinates
orig_x = fx + crop_x
orig_y = fy + crop_y
else:
# No crop - coordinates are already in original frame space
orig_x, orig_y = fx, fy
# Convert from original frame coordinates to rotated frame coordinates
# Features are stored in transformed frame coordinates
# We need to map them to screen coordinates for display
# The transformed frame coordinates need to be mapped to rotated frame coordinates first
orig_x, orig_y = self._map_transformed_to_original_coords(fx, fy)
rot_x, rot_y = self._map_original_to_rotated_coords(orig_x, orig_y)
sx, sy = self._map_rotated_to_screen(rot_x, rot_y)
cv2.circle(canvas, (sx, sy), 4, (0, 255, 0), -1) # Green circles for features
@@ -3577,28 +3563,19 @@ class VideoEditor:
elif key == ord("T"):
# Extract features from current frame (Shift+T)
if not self.is_image_mode and self.current_display_frame is not None:
# Extract features from the cropped region of the original frame
# This gives us features only from the visible area with correct coordinates
if self.crop_rect:
x, y, w, h = self.crop_rect
cropped_frame = self.current_display_frame[y:y+h, x:x+w]
if cropped_frame.size > 0:
success = self.feature_tracker.extract_features(cropped_frame, self.current_frame)
# Extract features from the transformed frame (what user sees)
# This handles all transformations (crop, zoom, rotation) correctly
display_frame = self.apply_crop_zoom_and_rotation(self.current_display_frame)
if display_frame is not None:
# Extract features without coordinate mapping - store in transformed frame coordinates
success = self.feature_tracker.extract_features(display_frame, self.current_frame)
if success:
count = self.feature_tracker.get_feature_count(self.current_frame)
self.show_feedback_message(f"Extracted {count} features from crop area")
self.show_feedback_message(f"Extracted {count} features from visible area")
else:
self.show_feedback_message("Failed to extract features")
else:
self.show_feedback_message("Crop area too small")
else:
# No crop - extract from full frame
success = self.feature_tracker.extract_features(self.current_display_frame, self.current_frame)
if success:
count = self.feature_tracker.get_feature_count(self.current_frame)
self.show_feedback_message(f"Extracted {count} features from full frame")
else:
self.show_feedback_message("Failed to extract features")
self.show_feedback_message("No display frame available")
self.save_state()
else:
self.show_feedback_message("No frame data available")