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New YOLOv8 Results() class for prediction outputs (#314)

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This commit is contained in:
Ayush Chaurasia
2023-01-17 19:02:34 +05:30
committed by GitHub
parent 0cb87f7dd3
commit c6985da9de
32 changed files with 813 additions and 259 deletions
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64
ultralytics/yolo/v8/segment/predict.py
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@ -3,8 +3,8 @@
import hydra
import torch
from ultralytics.yolo.engine.results import Results
from ultralytics.yolo.utils import DEFAULT_CONFIG, ROOT, ops
from ultralytics.yolo.utils.checks import check_imgsz
from ultralytics.yolo.utils.plotting import colors, save_one_box
from ultralytics.yolo.v8.detect.predict import DetectionPredictor
@ -12,7 +12,6 @@ from ultralytics.yolo.v8.detect.predict import DetectionPredictor
class SegmentationPredictor(DetectionPredictor):
def postprocess(self, preds, img, orig_img):
masks = []
# TODO: filter by classes
p = ops.non_max_suppression(preds[0],
self.args.conf,
@ -20,27 +19,29 @@ class SegmentationPredictor(DetectionPredictor):
agnostic=self.args.agnostic_nms,
max_det=self.args.max_det,
nm=32)
results = []
proto = preds[1][-1]
for i, pred in enumerate(p):
shape = orig_img[i].shape if self.webcam else orig_img.shape
shape = orig_img[i].shape if isinstance(orig_img, list) else orig_img.shape
if not len(pred):
results.append(Results(boxes=pred[:, :6], orig_shape=shape[:2])) # save empty boxes
continue
if self.args.retina_masks:
pred[:, :4] = ops.scale_boxes(img.shape[2:], pred[:, :4], shape).round()
masks.append(ops.process_mask_native(proto[i], pred[:, 6:], pred[:, :4], shape[:2])) # HWC
masks = ops.process_mask_native(proto[i], pred[:, 6:], pred[:, :4], shape[:2]) # HWC
else:
masks.append(ops.process_mask(proto[i], pred[:, 6:], pred[:, :4], img.shape[2:], upsample=True)) # HWC
masks = ops.process_mask(proto[i], pred[:, 6:], pred[:, :4], img.shape[2:], upsample=True) # HWC
pred[:, :4] = ops.scale_boxes(img.shape[2:], pred[:, :4], shape).round()
results.append(Results(boxes=pred[:, :6], masks=masks, orig_shape=shape[:2]))
return results
return (p, masks)
def write_results(self, idx, preds, batch):
def write_results(self, idx, results, batch):
p, im, im0 = batch
log_string = ""
if len(im.shape) == 3:
im = im[None] # expand for batch dim
self.seen += 1
if self.webcam: # batch_size >= 1
if self.webcam or self.from_img: # batch_size >= 1
log_string += f'{idx}: '
frame = self.dataset.count
else:
@ -51,54 +52,48 @@ class SegmentationPredictor(DetectionPredictor):
log_string += '%gx%g ' % im.shape[2:] # print string
self.annotator = self.get_annotator(im0)
preds, masks = preds
det = preds[idx]
if len(det) == 0:
result = results[idx]
if len(result) == 0:
return log_string
# Segments
mask = masks[idx]
if self.args.save_txt or self.return_outputs:
shape = im0.shape if self.args.retina_masks else im.shape[2:]
segments = [
ops.scale_segments(shape, x, im0.shape, normalize=False) for x in reversed(ops.masks2segments(mask))]
det, mask = result.boxes, result.masks # getting tensors TODO: mask mask,box inherit for tensor
# Print results
for c in det[:, 5].unique():
n = (det[:, 5] == c).sum() # detections per class
log_string += f"{n} {self.model.names[int(c)]}{'s' * (n > 1)}, " # add to string
for c in det.cls.unique():
n = (det.cls == c).sum() # detections per class
log_string += f"{n} {self.model.names[int(c)]}{'s' * (n > 1)}, "
# Mask plotting
self.annotator.masks(
mask,
colors=[colors(x, True) for x in det[:, 5]],
mask.masks,
colors=[colors(x, True) for x in det.cls],
im_gpu=torch.as_tensor(im0, dtype=torch.float16).to(self.device).permute(2, 0, 1).flip(0).contiguous() /
255 if self.args.retina_masks else im[idx])
det = reversed(det[:, :6])
if self.return_outputs:
self.output["det"] = det.cpu().numpy()
self.output["segment"] = segments
# Segments
if self.args.save_txt:
segments = mask.segments
# Write results
for j, (*xyxy, conf, cls) in enumerate(det):
for j, d in enumerate(reversed(det)):
cls, conf = d.cls.squeeze(), d.conf.squeeze()
if self.args.save_txt: # Write to file
seg = segments[j].copy()
seg[:, 0] /= shape[1] # width
seg[:, 1] /= shape[0] # height
seg = seg.reshape(-1) # (n,2) to (n*2)
line = (cls, *seg, conf) if self.args.save_conf else (cls, *seg) # label format
with open(f'{self.txt_path}.txt', 'a') as f:
f.write(('%g ' * len(line)).rstrip() % line + '\n')
if self.args.save or self.args.save_crop or self.args.show:
if self.args.save or self.args.save_crop or self.args.show: # Add bbox to image
c = int(cls) # integer class
label = None if self.args.hide_labels else (
self.model.names[c] if self.args.hide_conf else f'{self.model.names[c]} {conf:.2f}')
self.annotator.box_label(xyxy, label, color=colors(c, True))
# annotator.draw.polygon(segments[j], outline=colors(c, True), width=3)
self.annotator.box_label(d.xyxy.squeeze(), label, color=colors(c, True))
if self.args.save_crop:
imc = im0.copy()
save_one_box(xyxy, imc, file=self.save_dir / 'crops' / self.model.names[c] / f'{p.stem}.jpg', BGR=True)
save_one_box(d.xyxy,
imc,
file=self.save_dir / 'crops' / self.model.model.names[c] / f'{self.data_path.stem}.jpg',
BGR=True)
return log_string
@ -106,7 +101,6 @@ class SegmentationPredictor(DetectionPredictor):
@hydra.main(version_base=None, config_path=str(DEFAULT_CONFIG.parent), config_name=DEFAULT_CONFIG.name)
def predict(cfg):
cfg.model = cfg.model or "yolov8n-seg.pt"
cfg.imgsz = check_imgsz(cfg.imgsz, min_dim=2) # check image size
cfg.source = cfg.source if cfg.source is not None else ROOT / "assets"
predictor = SegmentationPredictor(cfg)