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YOLOV5实时检测屏幕
目录
注:此为笔记目的:保留模型加载和推理部分,完成实时屏幕检测
实现思路:
1. 写一个实时截取屏幕的函数
2. 将截取的屏幕在窗口显示出来
3. 用OpenCV绘制一个窗口用来显示截取的屏幕
4. 在detect找出推理的代码,推理完成后得到中心点的xy坐标,宽高组成box
5. 在创建的OpenCV窗口用得到的推理结果绘制方框
实现效果:
思考部分
先把原本的detect.py的代码贴在这里
- import argparse
- import os
- import platform
- import sys
- from pathlib import Path
- import torch
- FILE = Path(__file__).resolve()
- ROOT = FILE.parents[0] # YOLOv5 root directory
- if str(ROOT) not in sys.path:
- sys.path.append(str(ROOT)) # add ROOT to PATH
- ROOT = Path(os.path.relpath(ROOT, Path.cwd())) # relative
- from models.common import DetectMultiBackend
- from utils.dataloaders import IMG_FORMATS, VID_FORMATS, LoadImages, LoadScreenshots, LoadStreams
- from utils.general import (LOGGER, Profile, check_file, check_img_size, check_imshow, check_requirements, colorstr, cv2,
- increment_path, non_max_suppression, print_args, scale_boxes, strip_optimizer, xyxy2xywh)
- from utils.plots import Annotator, colors, save_one_box
- from utils.torch_utils import select_device, smart_inference_mode
- @smart_inference_mode()
- def run(
- weights=ROOT / 'yolov5s.pt', # model path or triton URL
- source=ROOT / 'data/video/',
- data=ROOT / 'data/coco128.yaml', # dataset.yaml path
- imgsz=(640, 640), # inference size (height, width)
- conf_thres=0.25, # confidence threshold
- iou_thres=0.45, # NMS IOU threshold
- max_det=1000, # maximum detections per image
- device='', # cuda device, i.e. 0 or 0,1,2,3 or cpu
- view_img=False, # show results
- save_txt=False, # save results to *.txt
- save_conf=False, # save confidences in --save-txt labels
- save_crop=False, # save cropped prediction boxes
- nosave=False, # do not save images/videos
- classes=None, # filter by class: --class 0, or --class 0 2 3
- agnostic_nms=False, # class-agnostic NMS
- augment=False, # augmented inference
- visualize=False, # visualize features
- update=False, # update all models
- project=ROOT / 'runs/detect', # save results to project/name
- name='exp', # save results to project/name
- exist_ok=False, # existing project/name ok, do not increment
- line_thickness=3, # bounding box thickness (pixels)
- hide_labels=False, # hide labels
- hide_conf=False, # hide confidences
- half=False, # use FP16 half-precision inference
- dnn=False, # use OpenCV DNN for ONNX inference
- vid_stride=1, # video frame-rate stride
- ):
- source = str(source)
- save_img = not nosave and not source.endswith('.txt') # save inference images
- is_file = Path(source).suffix[1:] in (IMG_FORMATS + VID_FORMATS)
- is_url = source.lower().startswith(('rtsp://', 'rtmp://', 'http://', 'https://'))
- webcam = source.isnumeric() or source.endswith('.streams') or (is_url and not is_file)
- screenshot = source.lower().startswith('screen')
- if is_url and is_file:
- source = check_file(source) # download
- # Directories
- save_dir = increment_path(Path(project) / name, exist_ok=exist_ok) # increment run
- (save_dir / 'labels' if save_txt else save_dir).mkdir(parents=True, exist_ok=True) # make dir
- # Load model
- device = select_device(device)
- model = DetectMultiBackend(weights, device=device, dnn=dnn, data=data, fp16=half)
- stride, names, pt = model.stride, model.names, model.pt
- imgsz = check_img_size(imgsz, s=stride) # check image size
- # Dataloader
- bs = 1 # batch_size
- if webcam:
- view_img = check_imshow(warn=True)
- dataset = LoadStreams(source, img_size=imgsz, stride=stride, auto=pt, vid_stride=vid_stride)
- bs = len(dataset)
- elif screenshot:
- dataset = LoadScreenshots(source, img_size=imgsz, stride=stride, auto=pt)
- else:
- dataset = LoadImages(source, img_size=imgsz, stride=stride, auto=pt, vid_stride=vid_stride)
- vid_path, vid_writer = [None] * bs, [None] * bs
- # Run inference
- model.warmup(imgsz=(1 if pt or model.triton else bs, 3, *imgsz)) # warmup
- seen, windows, dt = 0, [], (Profile(), Profile(), Profile())
- for path, im, im0s, vid_cap, s in dataset:
- with dt[0]:
- im = torch.from_numpy(im).to(model.device)
- im = im.half() if model.fp16 else im.float() # uint8 to fp16/32
- im /= 255 # 0 - 255 to 0.0 - 1.0
- if len(im.shape) == 3:
- im = im[None] # expand for batch dim
- # Inference
- with dt[1]:
- visualize = increment_path(save_dir / Path(path).stem, mkdir=True) if visualize else False
- pred = model(im, augment=augment, visualize=visualize)
- # NMS
- with dt[2]:
- pred = non_max_suppression(pred, conf_thres, iou_thres, classes, agnostic_nms, max_det=max_det)
- # Second-stage classifier (optional)
- # pred = utils.general.apply_classifier(pred, classifier_model, im, im0s)
- # Process predictions
- for i, det in enumerate(pred): # per image
- seen += 1
- if webcam: # batch_size >= 1
- p, im0, frame = path[i], im0s[i].copy(), dataset.count
- s += f'{i}: '
- else:
- p, im0, frame = path, im0s.copy(), getattr(dataset, 'frame', 0)
- p = Path(p) # to Path
- save_path = str(save_dir / p.name) # im.jpg
- txt_path = str(save_dir / 'labels' / p.stem) + ('' if dataset.mode == 'image' else f'_{frame}') # im.txt
- s += '%gx%g ' % im.shape[2:] # print string
- gn = torch.tensor(im0.shape)[[1, 0, 1, 0]] # normalization gain whwh
- imc = im0.copy() if save_crop else im0 # for save_crop
- annotator = Annotator(im0, line_width=line_thickness, example=str(names))
- if len(det):
- # Rescale boxes from img_size to im0 size
- det[:, :4] = scale_boxes(im.shape[2:], det[:, :4], im0.shape).round()
- # Print results
- for c in det[:, 5].unique():
- n = (det[:, 5] == c).sum() # detections per class
- s += f"{n} {names[int(c)]}{'s' * (n > 1)}, " # add to string
- # Write results
- for *xyxy, conf, cls in reversed(det):
- if save_txt: # Write to file
- xywh = (xyxy2xywh(torch.tensor(xyxy).view(1, 4)) / gn).view(-1).tolist() # normalized xywh
- line = (cls, *xywh, conf) if save_conf else (cls, *xywh) # label format
- with open(f'{txt_path}.txt', 'a') as f:
- f.write(('%g ' * len(line)).rstrip() % line + '\n')
- if save_img or save_crop or view_img: # Add bbox to image
- c = int(cls) # integer class
- label = None if hide_labels else (names[c] if hide_conf else f'{names[c]} {conf:.2f}')
- annotator.box_label(xyxy, label, color=colors(c, True))
- if save_crop:
- save_one_box(xyxy, imc, file=save_dir / 'crops' / names[c] / f'{p.stem}.jpg', BGR=True)
- # Stream results
- im0 = annotator.result()
- if view_img:
- if platform.system() == 'Linux' and p not in windows:
- windows.append(p)
- cv2.namedWindow(str(p), cv2.WINDOW_NORMAL | cv2.WINDOW_KEEPRATIO) # allow window resize (Linux)
- cv2.resizeWindow(str(p), im0.shape[1], im0.shape[0])
- cv2.imshow(str(p), im0)
- cv2.waitKey(1) # 1 millisecond
- # Save results (image with detections)
- if save_img:
- if dataset.mode == 'image':
- cv2.imwrite(save_path, im0)
- else: # 'video' or 'stream'
- if vid_path[i] != save_path: # new video
- vid_path[i] = save_path
- if isinstance(vid_writer[i], cv2.VideoWriter):
- vid_writer[i].release() # release previous video writer
- if vid_cap: # video
- fps = vid_cap.get(cv2.CAP_PROP_FPS)
- w = int(vid_cap.get(cv2.CAP_PROP_FRAME_WIDTH))
- h = int(vid_cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
- else: # stream
- fps, w, h = 30, im0.shape[1], im0.shape[0]
- save_path = str(Path(save_path).with_suffix('.mp4')) # force *.mp4 suffix on results videos
- vid_writer[i] = cv2.VideoWriter(save_path, cv2.VideoWriter_fourcc(*'mp4v'), fps, (w, h))
- vid_writer[i].write(im0)
- # Print time (inference-only)
- LOGGER.info(f"{s}{'' if len(det) else '(no detections), '}{dt[1].dt * 1E3:.1f}ms")
- # Print results
- t = tuple(x.t / seen * 1E3 for x in dt) # speeds per image
- LOGGER.info(f'Speed: %.1fms pre-process, %.1fms inference, %.1fms NMS per image at shape {(1, 3, *imgsz)}' % t)
- if save_txt or save_img:
- s = f"\n{len(list(save_dir.glob('labels/*.txt')))} labels saved to {save_dir / 'labels'}" if save_txt else ''
- LOGGER.info(f"Results saved to {colorstr('bold', save_dir)}{s}")
- if update:
- strip_optimizer(weights[0]) # update model (to fix SourceChangeWarning)
- def parse_opt():
- parser = argparse.ArgumentParser()
- parser.add_argument('--weights', nargs='+', type=str, default=ROOT / 'yolov5s.pt', help='model path or triton URL')
- parser.add_argument('--source', type=str, default=ROOT / '0', help='file/dir/URL/glob/screen/1(webcam)')
- parser.add_argument('--data', type=str, default=ROOT / 'data/coco128.yaml', help='(optional) dataset.yaml path')
- parser.add_argument('--imgsz', '--img', '--img-size', nargs='+', type=int, default=[640], help='inference size h,w')
- parser.add_argument('--conf-thres', type=float, default=0.45, help='confidence threshold')
- parser.add_argument('--iou-thres', type=float, default=0.2, help='NMS IoU threshold')
- parser.add_argument('--max-det', type=int, default=1000, help='maximum detections per image')
- parser.add_argument('--device', default='', help='cuda device, i.e. 0 or 0,1,2,3 or cpu')
- parser.add_argument('--view-img', action='store_true', help='show results')
- parser.add_argument('--save-txt', action='store_true', help='save results to *.txt')
- parser.add_argument('--save-conf', action='store_true', help='save confidences in --save-txt labels')
- parser.add_argument('--save-crop', action='store_true', help='save cropped prediction boxes')
- parser.add_argument('--nosave', action='store_true', help='do not save images/videos')
- parser.add_argument('--classes', nargs='+', type=int, help='filter by class: --classes 0, or --classes 0 2 3')
- parser.add_argument('--agnostic-nms', action='store_true', help='class-agnostic NMS')
- parser.add_argument('--augment', action='store_true', help='augmented inference')
- parser.add_argument('--visualize', action='store_true', help='visualize features')
- parser.add_argument('--update', action='store_true', help='update all models')
- parser.add_argument('--project', default=ROOT / 'runs/detect', help='save results to project/name')
- parser.add_argument('--name', default='exp', help='save results to project/name')
- parser.add_argument('--exist-ok', action='store_true', help='existing project/name ok, do not increment')
- parser.add_argument('--line-thickness', default=3, type=int, help='bounding box thickness (pixels)')
- parser.add_argument('--hide-labels', default=False, action='store_true', help='hide labels')
- parser.add_argument('--hide-conf', default=False, action='store_true', help='hide confidences')
- parser.add_argument('--half', action='store_true', help='use FP16 half-precision inference')
- parser.add_argument('--dnn', action='store_true', help='use OpenCV DNN for ONNX inference')
- parser.add_argument('--vid-stride', type=int, default=1, help='video frame-rate stride')
- opt = parser.parse_args()
- opt.imgsz *= 2 if len(opt.imgsz) == 1 else 1 # expand
- print_args(vars(opt))
- return opt
- def main(opt):
- check_requirements(exclude=('tensorboard', 'thop'))
- run(**vars(opt))
- if __name__ == '__main__':
- opt = parse_opt()
- main(opt)
复制代码 分析代码并删减不用的部分
- import argparse
- import os
- import platform
- import sys
- from pathlib import Path
- import torch
- FILE = Path(__file__).resolve()
- ROOT = FILE.parents[0] # YOLOv5 root directory
- if str(ROOT) not in sys.path:
- sys.path.append(str(ROOT)) # add ROOT to PATH
- ROOT = Path(os.path.relpath(ROOT, Path.cwd())) # relative
- from models.common import DetectMultiBackend
- from utils.dataloaders import IMG_FORMATS, VID_FORMATS, LoadImages, LoadScreenshots, LoadStreams
- from utils.general import (LOGGER, Profile, check_file, check_img_size, check_imshow, check_requirements, colorstr, cv2,
- increment_path, non_max_suppression, print_args, scale_boxes, strip_optimizer, xyxy2xywh)
- from utils.plots import Annotator, colors, save_one_box
- from utils.torch_utils import select_device, smart_inference_mode
复制代码 做了一些包的导入,定义了一些全局变量,先保留下来,没用的最后删
向下- if __name__ == '__main__':
- opt = parse_opt()
- main(opt)
复制代码 从if __name__ == '__main__开始
opt = parse_opt 就是一个获取命令行参数的函数,我们并不需要,可以删
进入main函数- def main(opt):
- check_requirements(exclude=('tensorboard', 'thop'))
- run(**vars(opt))
复制代码 check_requirements函数检查requirements是否全都安装好了,无用,删了
进入run函数- source = str(source)
- save_img = not nosave and not source.endswith('.txt') # save inference images
- is_file = Path(source).suffix[1:] in (IMG_FORMATS + VID_FORMATS)
- is_url = source.lower().startswith(('rtsp://', 'rtmp://', 'http://', 'https://'))
- webcam = source.isnumeric() or source.endswith('.streams') or (is_url and not is_file)
- screenshot = source.lower().startswith('screen')
- if is_url and is_file:
- source = check_file(source) # download
- # Directories
- save_dir = increment_path(Path(project) / name, exist_ok=exist_ok) # increment run
- (save_dir / 'labels' if save_txt else save_dir).mkdir(parents=True, exist_ok=True) # make dir
复制代码 判断source的类型,即要要推理的源是什么,判断源是文件还是url还是webcam或者screenshot ,定义保存文件夹,我不需要保存,只需要实时检测屏幕,删除
继续向下,是加载模型的代码- # Load model
- device = select_device(device)
- model = DetectMultiBackend(weights, device=device, dnn=dnn, data=data, fp16=half)
复制代码 得知加载模型需要几个参数,分别是weights, device=device, dnn=dnn, data=data, fp16=half
通过开始的形参可知:
- weights=ROOT / 'yolov5s.pt' 也就是模型的名称
- device通过select_device函数得到
- dnn和fp16在run函数里的参数都是FALSE
故加载模型的代码可以改写成- def LoadModule():
- device = select_device('')
- weights = 'yolov5s.pt'
- model = DetectMultiBackend(weights, device=device, dnn=False, fp16=False)
- return model
复制代码 继续往下读- bs = 1 # batch_size
- if webcam:
- view_img = check_imshow(warn=True)
- dataset = LoadStreams(source, img_size=imgsz, stride=stride, auto=pt, vid_stride=vid_stride)
- bs = len(dataset)
- elif screenshot:
- dataset = LoadScreenshots(source, img_size=imgsz, stride=stride, auto=pt)
- else:
- dataset = LoadImages(source, img_size=imgsz, stride=stride, auto=pt, vid_stride=vid_stride)
- vid_path, vid_writer = [None] * bs, [None] * bs
复制代码 这里如果是使用网络摄像头作为输入,会通过LoadStreams类加载视频流,根据图像大小和步长采样,如果使用截图作为输入,则通过LoadScreenshots加载截图,都不是则通过LoadImages类加载图片文件
这是YOLOV5提供的加载dataset的部分,我们可以添加自己的dataset,所以删掉
继续往下- # Run inference
- model.warmup(imgsz=(1 if pt or model.triton else bs, 3, *imgsz)) # warmup
- seen, windows, dt = 0, [], (Profile(), Profile(), Profile())
- for path, im, im0s, vid_cap, s in dataset:
- with dt[0]:
- im = torch.from_numpy(im).to(model.device)
- im = im.half() if model.fp16 else im.float() # uint8 to fp16/32
- im /= 255 # 0 - 255 to 0.0 - 1.0
- if len(im.shape) == 3:
- im = im[None] # expand for batch dim
- # Inference
- with dt[1]:
- visualize = increment_path(save_dir / Path(path).stem, mkdir=True) if visualize else False
- pred = model(im, augment=augment, visualize=visualize)
- # NMS
- with dt[2]:
- pred = non_max_suppression(pred, conf_thres, iou_thres, classes, agnostic_nms, max_det=max_det)
- # Second-stage classifier (optional)
- # pred = utils.general.apply_classifier(pred, classifier_model, im, im0s)
- # Process predictions
复制代码 model.warmup(imgsz=(1 if pt or model.triton else bs, 3, *imgsz))
用于模型预热,传入形状为(1, 3, *imgsz)的图像进行预热操作,没用删了
seen, windows, dt = 0, [], (Profile(), Profile(), Profile())
未知作用,删了- for path, im, im0s, vid_cap, s in dataset:
- with dt[0]:
- im = torch.from_numpy(im).to(model.device)
- im = im.half() if model.fp16 else im.float() # uint8 to fp16/32
- im /= 255 # 0 - 255 to 0.0 - 1.0
- if len(im.shape) == 3:
- im = im[None] # expand for batch dim
- # Inference
- with dt[1]:
- visualize = increment_path(save_dir / Path(path).stem, mkdir=True) if visualize else False
- pred = model(im, augment=augment, visualize=visualize)
- # NMS
- with dt[2]:
- pred = non_max_suppression(pred, conf_thres, iou_thres, classes, agnostic_nms, max_det=max_det)
复制代码 上面这段for循环用于遍历数据集中的每个图像或视频帧进行推理,在循环的开头,将路径、图像、原始图像、视频捕获对象和步长传递给path, im, im0s, vid_cap, s。推理实时屏幕只需要传一张图片,所以不存在将遍历推理,所以要进行改写,改写成- im = torch.from_numpy(im).to(model.device)
- im = im.half() if model.fp16 else im.float() # uint8 to fp16/32
- im /= 255 # 0 - 255 to 0.0 - 1.0
- if len(im.shape) == 3:
- im = im[None] # expand for batch dim
- visualize = increment_path(save_dir / Path(path).stem, mkdir=True) if visualize else False
- pred = model(im, augment=augment, visualize=visualize)
- pred = non_max_suppression(pred, conf_thres, iou_thres, classes, agnostic_nms, max_det=max_det)
复制代码 这里是对 im 进行转换和推理,而改写的代码中没有im变量,则寻找im的来源
for path, im, im0s, vid_cap, s in dataset:
im来源于dataset
dataset = LoadImages(source, img_size=imgsz, stride=stride, auto=pt, vid_stride=vid_stride)
dataset来源于LoadImages的返回值
查看LoadImages的函数返回值和返回值的来源
在dataloaders.py中可以看到- if self.transforms:
- im = self.transforms(im0) # transforms
- else:
- im = letterbox(im0, self.img_size, stride=self.stride, auto=self.auto)[0] # padded resize
- im = im.transpose((2, 0, 1))[::-1] # HWC to CHW, BGR to RGB
- im = np.ascontiguousarray(im) # contiguous
- return path, im, im0, self.cap, s
复制代码 如果transforms存在,则转换,如果transforms不存在,则调用letterbox函数对图像im0进行缩放和填充,使其符合模型要求的图像大小,将图像的通道顺序由HWC转换为CHW,将图像的通道顺序由BGR转换为RGB,将图像转换为连续的内存布局
其中需要的参数是im0, self.img_size, stride=self.stride, auto=self.auto
im0则是未经处理的图片,img_size填640(因为模型的图片大小训练的是640),stride填64(默认参数为64),auto填True
则得到改写代码为- im = letterbox(img0, 640, stride=32, auto=True)[0] # padded resize
- im = im.transpose((2, 0, 1))[::-1] # HWC to CHW, BGR to RGB
- im = np.ascontiguousarray(im) # contiguous
- im = torch.from_numpy(im).to(model.device)
- im = im.half() if model.fp16 else im.float() # uint8 to fp16/32
- im /= 255 # 0 - 255 to 0.0 - 1.0
- if len(im.shape) == 3:
- im = im[None] # expand for batch dim
- pred = model(im, augment=False, visualize=False)
- pred = non_max_suppression(pred, conf_thres=conf_thres, iou_thres=iou_thres, classes=None, agnostic=False,
- max_det=1000)
复制代码 继续向下- for i, det in enumerate(pred): # per image
- seen += 1
- if webcam: # batch_size >= 1
- p, im0, frame = path[i], im0s[i].copy(), dataset.count
- s += f'{i}: '
- else:
- p, im0, frame = path, im0s.copy(), getattr(dataset, 'frame', 0)
- p = Path(p) # to Path
- save_path = str(save_dir / p.name) # im.jpg
- txt_path = str(save_dir / 'labels' / p.stem) + ('' if dataset.mode == 'image' else f'_{frame}') # im.txt
- s += '%gx%g ' % im.shape[2:] # print string
- gn = torch.tensor(im0.shape)[[1, 0, 1, 0]] # normalization gain whwh
- imc = im0.copy() if save_crop else im0 # for save_crop
- annotator = Annotator(im0, line_width=line_thickness, example=str(names))
- if len(det):
- # Rescale boxes from img_size to im0 size
- det[:, :4] = scale_boxes(im.shape[2:], det[:, :4], im0.shape).round()
- # Print results
- for c in det[:, 5].unique():
- n = (det[:, 5] == c).sum() # detections per class
- s += f"{n} {names[int(c)]}{'s' * (n > 1)}, " # add to string
- # Write results
- for *xyxy, conf, cls in reversed(det):
- if save_txt: # Write to file
- xywh = (xyxy2xywh(torch.tensor(xyxy).view(1, 4)) / gn).view(-1).tolist() # normalized xywh
- line = (cls, *xywh, conf) if save_conf else (cls, *xywh) # label format
- with open(f'{txt_path}.txt', 'a') as f:
- f.write(('%g ' * len(line)).rstrip() % line + '\n')
- if save_img or save_crop or view_img: # Add bbox to image
- c = int(cls) # integer class
- label = None if hide_labels else (names[c] if hide_conf else f'{names[c]} {conf:.2f}')
- annotator.box_label(xyxy, label, color=colors(c, True))
- if save_crop:
- save_one_box(xyxy, imc, file=save_dir / 'crops' / names[c] / f'{p.stem}.jpg', BGR=True)
复制代码 这段代码将推理后的结果进行转换,转换为label format,成为人能看懂的格式,删去输出结果,留下写入结果中的,格式转换,删掉保存为txt文件,得到需要的box,然后自己写一个boxs=[],将结果append进去,方便在OpenCV中绘画识别方框,改写结果为- boxs=[]
- for i, det in enumerate(pred): # per image
- im0 = img0.copy()
- s = ' '
- s += '%gx%g ' % im.shape[2:] # print string
- gn = torch.tensor(img0.shape)[[1, 0, 1, 0]] # normalization gain whwh
- imc = img0 # for save_crop
- if len(det):
- # Rescale boxes from img_size to im0 size
- det[:, :4] = scale_boxes(im.shape[2:], det[:, :4], im0.shape).round()
- # Print results
- for c in det[:, 5].unique():
- n = (det[:, 5] == c).sum() # detections per class
- s += f"{n} {names[int(c)]}{'s' * (n > 1)}, " # add to string
- # Write results
- for *xyxy, conf, cls in reversed(det):
- xywh = (xyxy2xywh(torch.tensor(xyxy).view(1, 4)) / gn).view(-1).tolist() # normalized xywh
- line = (cls, *xywh) # label format
- box = ('%g ' * len(line)).rstrip() % line
- box = box.split(' ')
- boxs.append(box)
复制代码 就此完成了推理部分的删减和重写
把屏幕的截图通过OpenCV进行显示
写一个屏幕截图的文件
写成 grabscreen.py- # 文件名:grabscreen.py
- import cv2
- import numpy as np
- import win32gui
- import win32print
- import win32ui
- import win32con
- import win32api
- import mss
- def grab_screen_win32(region):
- hwin = win32gui.GetDesktopWindow()
- left, top, x2, y2 = region
- width = x2 - left + 1
- height = y2 - top + 1
- hwindc = win32gui.GetWindowDC(hwin)
- srcdc = win32ui.CreateDCFromHandle(hwindc)
- memdc = srcdc.CreateCompatibleDC()
- bmp = win32ui.CreateBitmap()
- bmp.CreateCompatibleBitmap(srcdc, width, height)
- memdc.SelectObject(bmp)
- memdc.BitBlt((0, 0), (width, height), srcdc, (left, top), win32con.SRCCOPY)
- signedIntsArray = bmp.GetBitmapBits(True)
- img = np.fromstring(signedIntsArray, dtype='uint8')
- img.shape = (height, width, 4)
- srcdc.DeleteDC()
- memdc.DeleteDC()
- win32gui.ReleaseDC(hwin, hwindc)
- win32gui.DeleteObject(bmp.GetHandle())
- return cv2.cvtColor(img, cv2.COLOR_BGRA2BGR)
复制代码 通过img0 = grab_screen_win32(region=(0, 0, 1920, 1080))来作为im的参数传入,即可让屏幕截图作为推理图片
用OpenCV绘制窗口并显示
- if len(boxs):
- for i, det in enumerate(boxs):
- _, x_center, y_center, width, height = det
- x_center, width = re_x * float(x_center), re_x * float(width)
- y_center, height = re_y * float(y_center), re_y * float(height)
- top_left = (int(x_center - width / 2.), int(y_center - height / 2.))
- bottom_right = (int(x_center + width / 2.), int(y_center + height / 2.))
- color = (0, 0, 255) # RGB
- cv2.rectangle(img0, top_left, bottom_right, color, thickness=thickness)
- 和
- cv2.namedWindow('windows', cv2.WINDOW_NORMAL)
- cv2.resizeWindow('windows', re_x // 2, re_y // 2)
- cv2.imshow('windows', img0)
- HWND = win32gui.FindWindow(None, "windows")
- win32gui.SetWindowPos(HWND, win32con.HWND_TOPMOST, 0, 0, 0, 0, win32con.SWP_NOMOVE | win32con.SWP_NOSIZE)
复制代码 结合在一起
最终代码
- import torch, pynputimport numpy as npimport win32gui, win32con, cv2from grabscreen import grab_screen_win32 # 本地文件from utils.augmentations import letterboxfrom models.common import DetectMultiBackendfrom utils.torch_utils import select_devicefrom utils.general import non_max_suppression, scale_boxes, xyxy2xywh# 可调参数conf_thres = 0.25iou_thres = 0.05thickness = 2x, y = (1920, 1080)re_x, re_y = (1920, 1080)def LoadModule():
- device = select_device('')
- weights = 'yolov5s.pt'
- model = DetectMultiBackend(weights, device=device, dnn=False, fp16=False)
- return modelmodel = LoadModule()while True: names = model.names img0 = grab_screen_win32(region=(0, 0, 1920, 1080)) im = letterbox(img0, 640, stride=32, auto=True)[0] # padded resize
- im = im.transpose((2, 0, 1))[::-1] # HWC to CHW, BGR to RGB
- im = np.ascontiguousarray(im) # contiguous
- im = torch.from_numpy(im).to(model.device)
- im = im.half() if model.fp16 else im.float() # uint8 to fp16/32
- im /= 255 # 0 - 255 to 0.0 - 1.0
- if len(im.shape) == 3:
- im = im[None] # expand for batch dim
- pred = model(im, augment=False, visualize=False)
- pred = non_max_suppression(pred, conf_thres=conf_thres, iou_thres=iou_thres, classes=None, agnostic=False,
- max_det=1000) boxs=[]
- for i, det in enumerate(pred): # per image
- im0 = img0.copy()
- s = ' '
- s += '%gx%g ' % im.shape[2:] # print string
- gn = torch.tensor(img0.shape)[[1, 0, 1, 0]] # normalization gain whwh
- imc = img0 # for save_crop
- if len(det):
- # Rescale boxes from img_size to im0 size
- det[:, :4] = scale_boxes(im.shape[2:], det[:, :4], im0.shape).round()
- # Print results
- for c in det[:, 5].unique():
- n = (det[:, 5] == c).sum() # detections per class
- s += f"{n} {names[int(c)]}{'s' * (n > 1)}, " # add to string
- # Write results
- for *xyxy, conf, cls in reversed(det):
- xywh = (xyxy2xywh(torch.tensor(xyxy).view(1, 4)) / gn).view(-1).tolist() # normalized xywh
- line = (cls, *xywh) # label format
- box = ('%g ' * len(line)).rstrip() % line
- box = box.split(' ')
- boxs.append(box) if len(boxs): for i, det in enumerate(boxs): _, x_center, y_center, width, height = det x_center, width = re_x * float(x_center), re_x * float(width) y_center, height = re_y * float(y_center), re_y * float(height) top_left = (int(x_center - width / 2.), int(y_center - height / 2.)) bottom_right = (int(x_center + width / 2.), int(y_center + height / 2.)) color = (0, 0, 255) # RGB cv2.rectangle(img0, top_left, bottom_right, color, thickness=thickness) if cv2.waitKey(1) & 0xFF == ord('q'): cv2.destroyWindow() break cv2.namedWindow('windows', cv2.WINDOW_NORMAL) cv2.resizeWindow('windows', re_x // 2, re_y // 2) cv2.imshow('windows', img0) HWND = win32gui.FindWindow(None, "windows") win32gui.SetWindowPos(HWND, win32con.HWND_TOPMOST, 0, 0, 0, 0, win32con.SWP_NOMOVE | win32con.SWP_NOSIZE)
复制代码 End.
来源:https://www.cnblogs.com/water-wells/p/17448591.html
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