基于YOLOv7的tensorrt部署（源码+说明文档）.rar

import cv2 import tensorrt as trt import torch import numpy as np from collections import OrderedDict,namedtuple class TRT_engine(): def __init__(self, weight) -> None: self.imgsz = [640,640] self.weight = weight self.device = torch.device('cuda:0') self.init_engine() def init_engine(self): # Infer TensorRT Engine self.Binding = namedtuple('Binding', ('name', 'dtype', 'shape', 'data', 'ptr')) self.logger = trt.Logger(trt.Logger.INFO) trt.init_libnvinfer_plugins(self.logger, namespace="") with open(self.weight, 'rb') as self.f, trt.Runtime(self.logger) as self.runtime: self.model = self.runtime.deserialize_cuda_engine(self.f.read()) self.bindings = OrderedDict() self.fp16 = False for index in range(self.model.num_bindings): self.name = self.model.get_binding_name(index) self.dtype = trt.nptype(self.model.get_binding_dtype(index)) self.shape = tuple(self.model.get_binding_shape(index)) self.data = torch.from_numpy(np.empty(self.shape, dtype=np.dtype(self.dtype))).to(self.device) self.bindings[self.name] = self.Binding(self.name, self.dtype, self.shape, self.data, int(self.data.data_ptr())) if self.model.binding_is_input(index) and self.dtype == np.float16: self.fp16 = True self.binding_addrs = OrderedDict((n, d.ptr) for n, d in self.bindings.items()) self.context = self.model.create_execution_context() def letterbox(self,im,color=(114, 114, 114), auto=False, scaleup=True, stride=32): # Resize and pad image while meeting stride-multiple constraints shape = im.shape[:2] # current shape [height, width] new_shape = self.imgsz if isinstance(new_shape, int): new_shape = (new_shape, new_shape) # Scale ratio (new / old) self.r = min(new_shape[0] / shape[0], new_shape[1] / shape[1]) if not scaleup: # only scale down, do not scale up (for better val mAP) self.r = min(self.r, 1.0) # Compute padding new_unpad = int(round(shape[1] * self.r)), int(round(shape[0] * self.r)) self.dw, self.dh = new_shape[1] - new_unpad[0], new_shape[0] - new_unpad[1] # wh padding if auto: # minimum rectangle self.dw, self.dh = np.mod(self.dw, stride), np.mod(self.dh, stride) # wh padding self.dw /= 2 # divide padding into 2 sides self.dh /= 2 if shape[::-1] != new_unpad: # resize im = cv2.resize(im, new_unpad, interpolation=cv2.INTER_LINEAR) top, bottom = int(round(self.dh - 0.1)), int(round(self.dh + 0.1)) left, right = int(round(self.dw - 0.1)), int(round(self.dw + 0.1)) self.img = cv2.copyMakeBorder(im, top, bottom, left, right, cv2.BORDER_CONSTANT, value=color) # add border return self.img,self.r,self.dw,self.dh def preprocess(self,image): self.img,self.r,self.dw,self.dh = self.letterbox(image) self.img = self.img.transpose((2, 0, 1)) self.img = np.expand_dims(self.img,0) self.img = np.ascontiguousarray(self.img) self.img = torch.from_numpy(self.img).to(self.device) self.img = self.img.float() return self.img def predict(self,img,threshold): img = self.preprocess(img) self.binding_addrs['images'] = int(img.data_ptr()) self.context.execute_v2(list(self.binding_addrs.values())) nums = self.bindings['num_dets'].data[0].tolist() boxes = self.bindings['det_boxes'].data[0].tolist() scores =self.bindings['det_scores'].data[0].tolist() classes = self.bindings['det_classes'].data[0].tolist() num = int(nums[0]) new_bboxes = [] for i in range(num): if(scores[i] < threshold): continue xmin = (boxes[i][0] - self.dw)/self.r ymin = (boxes[i][1] - self.dh)/self.r xmax = (boxes[i][2] - self.dw)/self.r ymax = (boxes[i][3] - self.dh)/self.r new_bboxes.append([classes[i],scores[i],xmin,ymin,xmax,ymax]) return new_bboxes def visualize(img,bbox_array): for temp in bbox_array: xmin = int(temp[2]) ymin = int(temp[3]) xmax = int(temp[4]) ymax = int(temp[5]) clas = int(temp[0]) score = temp[1] cv2.rectangle(img,(xmin,ymin),(xmax,ymax), (105, 237, 249), 2) img = cv2.putText(img, "class:"+str(clas)+" "+str(round(score,2)), (xmin,int(ymin)-5), cv2.FONT_HERSHEY_SIMPLEX, 0.5, (105, 237, 249), 1) return img trt_engine = TRT_engine("./trt_model/yolov7_tiny_fp16.engine") img = cv2.imread("./pictures/zidane.jpg") results = trt_engine.predict(img,threshold=0.5) img = visualize(img,results) cv2.imshow("img",img) cv2.waitKey(0)