car-detection-bayes/detect.py

139 lines
5.5 KiB
Python

import argparse
import time
from sys import platform
from models import * # set ONNX_EXPORT in models.py
from utils.datasets import *
from utils.utils import *
def detect(save_txt=False, save_img=False, stream_img=False):
img_size = (320, 192) if ONNX_EXPORT else opt.img_size # (320, 192) or (416, 256) or (608, 352) for (height, width)
out, source, weights, half = opt.output, opt.source, opt.weights, opt.half
webcam = source == '0' or source.startswith('rtsp') or source.startswith('http')
# Initialize
device = torch_utils.select_device(force_cpu=ONNX_EXPORT)
torch.backends.cudnn.benchmark = False # set True to speed up constant image size inference
if os.path.exists(out):
shutil.rmtree(out) # delete output folder
os.makedirs(out) # make new output folder
# Initialize model
model = Darknet(opt.cfg, img_size)
# Load weights
if weights.endswith('.pt'): # pytorch format
model.load_state_dict(torch.load(weights, map_location=device)['model'])
else: # darknet format
_ = load_darknet_weights(model, weights)
# Fuse Conv2d + BatchNorm2d layers
# model.fuse()
# Eval mode
model.to(device).eval()
# Export mode
if ONNX_EXPORT:
img = torch.zeros((1, 3) + img_size) # (1, 3, 320, 192)
torch.onnx.export(model, img, 'weights/export.onnx', verbose=True)
return
# Half precision
half = half and device.type != 'cpu' # half precision only supported on CUDA
if half:
model.half()
# Set Dataloader
vid_path, vid_writer = None, None
if webcam:
stream_img = True
dataset = LoadWebcam(source, img_size=img_size, half=half)
else:
save_img = True
dataset = LoadImages(source, img_size=img_size, half=half)
# Get classes and colors
classes = load_classes(parse_data_cfg(opt.data)['names'])
colors = [[random.randint(0, 255) for _ in range(3)] for _ in range(len(classes))]
# Run inference
t0 = time.time()
for path, img, im0, vid_cap in dataset:
t = time.time()
save_path = str(Path(out) / Path(path).name)
# Get detections
img = torch.from_numpy(img).unsqueeze(0).to(device)
pred, _ = model(img)
det = non_max_suppression(pred.float(), opt.conf_thres, opt.nms_thres)[0]
s = '%gx%g ' % img.shape[2:] # print string
if det is not None and len(det):
# Rescale boxes from img_size to im0 size
det[:, :4] = scale_coords(img.shape[2:], det[:, :4], im0.shape).round()
# Print results
for c in det[:, -1].unique():
n = (det[:, -1] == c).sum() # detections per class
s += '%g %ss, ' % (n, classes[int(c)]) # add to string
# Write results
for *xyxy, conf, _, cls in det:
if save_txt: # Write to file
with open(save_path + '.txt', 'a') as file:
file.write(('%g ' * 6 + '\n') % (*xyxy, cls, conf))
if save_img or stream_img: # Add bbox to image
label = '%s %.2f' % (classes[int(cls)], conf)
plot_one_box(xyxy, im0, label=label, color=colors[int(cls)])
print('%sDone. (%.3fs)' % (s, time.time() - t))
# Stream results
if stream_img:
cv2.imshow(weights, im0)
# Save results (image with detections)
if save_img:
if dataset.mode == 'images':
cv2.imwrite(save_path, im0)
else:
if vid_path != save_path: # new video
vid_path = save_path
if isinstance(vid_writer, cv2.VideoWriter):
vid_writer.release() # release previous video writer
fps = vid_cap.get(cv2.CAP_PROP_FPS)
width = int(vid_cap.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(vid_cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
vid_writer = cv2.VideoWriter(save_path, cv2.VideoWriter_fourcc(*opt.fourcc), fps, (width, height))
vid_writer.write(im0)
if save_txt or save_img:
print('Results saved to %s' % os.getcwd() + os.sep + out)
if platform == 'darwin': # MacOS
os.system('open ' + out + ' ' + save_path)
print('Done. (%.3fs)' % (time.time() - t0))
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('--cfg', type=str, default='cfg/yolov3-spp.cfg', help='cfg file path')
parser.add_argument('--data', type=str, default='data/coco.data', help='coco.data file path')
parser.add_argument('--weights', type=str, default='weights/yolov3-spp.weights', help='path to weights file')
parser.add_argument('--source', type=str, default='data/samples', help='source') # input file/folder, 0 for webcam
parser.add_argument('--output', type=str, default='output', help='output folder') # output folder
parser.add_argument('--img-size', type=int, default=416, help='inference size (pixels)')
parser.add_argument('--conf-thres', type=float, default=0.3, help='object confidence threshold')
parser.add_argument('--nms-thres', type=float, default=0.5, help='iou threshold for non-maximum suppression')
parser.add_argument('--fourcc', type=str, default='mp4v', help='output video codec (verify ffmpeg support)')
parser.add_argument('--half', action='store_true', help='half precision FP16 inference')
opt = parser.parse_args()
print(opt)
with torch.no_grad():
detect()