import os import spaces import random from dataclasses import dataclass from typing import Any, List, Dict, Optional, Union, Tuple import cv2 import torch import requests import numpy as np from PIL import Image import matplotlib.pyplot as plt from transformers import AutoModelForMaskGeneration, AutoProcessor, pipeline import gradio as gr import json @dataclass class BoundingBox: xmin: int ymin: int xmax: int ymax: int @property def xyxy(self) -> List[float]: return [self.xmin, self.ymin, self.xmax, self.ymax] @dataclass class DetectionResult: score: float label: str box: BoundingBox mask: Optional[np.ndarray] = None @classmethod def from_dict(cls, detection_dict: Dict) -> 'DetectionResult': return cls( score=detection_dict['score'], label=detection_dict['label'], box=BoundingBox( xmin=detection_dict['box']['xmin'], ymin=detection_dict['box']['ymin'], xmax=detection_dict['box']['xmax'], ymax=detection_dict['box']['ymax'] ) ) def annotate(image: Union[Image.Image, np.ndarray], detection_results: List[DetectionResult], include_bboxes: bool = True) -> np.ndarray: image_cv2 = np.array(image) if isinstance(image, Image.Image) else image image_cv2 = cv2.cvtColor(image_cv2, cv2.COLOR_RGB2BGR) for detection in detection_results: label = detection.label score = detection.score box = detection.box mask = detection.mask if include_bboxes: color = np.random.randint(0, 256, size=3).tolist() cv2.rectangle(image_cv2, (box.xmin, box.ymin), (box.xmax, box.ymax), color, 2) cv2.putText(image_cv2, f'{label}: {score:.2f}', (box.xmin, box.ymin - 10), cv2.FONT_HERSHEY_SIMPLEX, 0.5, color, 2) return cv2.cvtColor(image_cv2, cv2.COLOR_BGR2RGB) def plot_detections(image: Union[Image.Image, np.ndarray], detections: List[DetectionResult], include_bboxes: bool = True) -> np.ndarray: annotated_image = annotate(image, detections, include_bboxes) return annotated_image def load_image(image: Union[str, Image.Image]) -> Image.Image: if isinstance(image, str) and image.startswith("http"): image = Image.open(requests.get(image, stream=True).raw).convert("RGB") elif isinstance(image, str): image = Image.open(image).convert("RGB") else: image = image.convert("RGB") return image def get_boxes(detection_results: List[DetectionResult]) -> List[List[List[float]]]: boxes = [] for result in detection_results: xyxy = result.box.xyxy boxes.append(xyxy) return [boxes] def mask_to_polygon(mask: np.ndarray) -> np.ndarray: contours, _ = cv2.findContours( mask, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE) if len(contours) == 0: return np.array([]) largest_contour = max(contours, key=cv2.contourArea) return largest_contour def refine_masks(masks: torch.BoolTensor, polygon_refinement: bool = False) -> List[np.ndarray]: masks = masks.cpu().float().permute(0, 2, 3, 1).mean( axis=-1).numpy().astype(np.uint8) masks = (masks > 0).astype(np.uint8) if polygon_refinement: for idx, mask in enumerate(masks): shape = mask.shape polygon = mask_to_polygon(mask) masks[idx] = cv2.fillPoly( np.zeros(shape, dtype=np.uint8), [polygon], 1) return list(masks) @spaces.GPU def detect(image: Image.Image, labels: List[str], threshold: float = 0.3, detector_id: Optional[str] = None) -> List[Dict[str, Any]]: detector_id = detector_id if detector_id else "IDEA-Research/grounding-dino-base" object_detector = pipeline( model=detector_id, task="zero-shot-object-detection", device="cpu") labels = [label if label.endswith(".") else label+"." for label in labels] results = object_detector( image, candidate_labels=labels, threshold=threshold) return [DetectionResult.from_dict(result) for result in results] @spaces.GPU def segment(image: Image.Image, detection_results: List[DetectionResult], polygon_refinement: bool = False, segmenter_id: Optional[str] = None) -> List[DetectionResult]: segmenter_id = segmenter_id if segmenter_id else "martintmv/InsectSAM" segmentator = AutoModelForMaskGeneration.from_pretrained( segmenter_id).to("cpu") processor = AutoProcessor.from_pretrained(segmenter_id) boxes = get_boxes(detection_results) inputs = processor(images=image, input_boxes=boxes, return_tensors="pt").to("cpu") outputs = segmentator(**inputs) masks = processor.post_process_masks( masks=outputs.pred_masks, original_sizes=inputs.original_sizes, reshaped_input_sizes=inputs.reshaped_input_sizes)[0] masks = refine_masks(masks, polygon_refinement) for detection_result, mask in zip(detection_results, masks): detection_result.mask = mask return detection_results def grounded_segmentation(image: Union[Image.Image, str], labels: List[str], threshold: float = 0.3, polygon_refinement: bool = False, detector_id: Optional[str] = None, segmenter_id: Optional[str] = None) -> Tuple[np.ndarray, List[DetectionResult]]: image = load_image(image) detections = detect(image, labels, threshold, detector_id) detections = segment(image, detections, polygon_refinement, segmenter_id) return np.array(image), detections def mask_to_min_max(mask: np.ndarray) -> Tuple[int, int, int, int]: y, x = np.where(mask) return x.min(), y.min(), x.max(), y.max() def extract_and_paste_insect(original_image: np.ndarray, detection: DetectionResult, background: np.ndarray) -> None: mask = detection.mask xmin, ymin, xmax, ymax = mask_to_min_max(mask) insect_crop = original_image[ymin:ymax, xmin:xmax] mask_crop = mask[ymin:ymax, xmin:xmax] insect = cv2.bitwise_and(insect_crop, insect_crop, mask=mask_crop) x_offset, y_offset = xmin, ymin x_end, y_end = x_offset + insect.shape[1], y_offset + insect.shape[0] insect_area = background[y_offset:y_end, x_offset:x_end] insect_area[mask_crop == 1] = insect[mask_crop == 1] def create_yellow_background_with_insects(image: np.ndarray) -> np.ndarray: labels = ["insect"] original_image, detections = grounded_segmentation( image, labels, threshold=0.3, polygon_refinement=True) yellow_background = np.full( (original_image.shape[0], original_image.shape[1], 3), (0, 255, 255), dtype=np.uint8) # BGR for yellow for detection in detections: if detection.mask is not None: extract_and_paste_insect( original_image, detection, yellow_background) # Convert back to RGB to match Gradio's expected input format yellow_background = cv2.cvtColor(yellow_background, cv2.COLOR_BGR2RGB) return yellow_background def run_length_encoding(mask): pixels = mask.flatten() rle = [] last_val = 0 count = 0 for pixel in pixels: if pixel == last_val: count += 1 else: if count > 0: rle.append(count) count = 1 last_val = pixel if count > 0: rle.append(count) return rle def detections_to_json(detections): detections_list = [] for detection in detections: detection_dict = { "score": detection.score, "label": detection.label, "box": { "xmin": detection.box.xmin, "ymin": detection.box.ymin, "xmax": detection.box.xmax }, "mask": run_length_encoding(detection.mask) if detection.mask is not None else None } detections_list.append(detection_dict) return detections_list def crop_bounding_boxes_with_yellow_background(image: np.ndarray, yellow_background: np.ndarray, detections: List[DetectionResult]) -> List[np.ndarray]: crops = [] for detection in detections: xmin, ymin, xmax, ymax = detection.box.xyxy crop = yellow_background[ymin:ymax, xmin:xmax] crops.append(crop) return crops