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add cuda and vulkan backends to dnn samples
8 contributors

Users who have contributed to this file

@dkurt @alalek @Omar-AE @vpisarev @rogday @l-bat @NobuoTsukamoto @allnes
import cv2 as cv
import argparse
import numpy as np
import sys
import time
from threading import Thread
if sys.version_info[0] == 2:
import Queue as queue
else:
import queue
from common import *
from tf_text_graph_common import readTextMessage
from tf_text_graph_ssd import createSSDGraph
from tf_text_graph_faster_rcnn import createFasterRCNNGraph
backends = (cv.dnn.DNN_BACKEND_DEFAULT, cv.dnn.DNN_BACKEND_HALIDE, cv.dnn.DNN_BACKEND_INFERENCE_ENGINE, cv.dnn.DNN_BACKEND_OPENCV,
cv.dnn.DNN_BACKEND_VKCOM, cv.dnn.DNN_BACKEND_CUDA)
targets = (cv.dnn.DNN_TARGET_CPU, cv.dnn.DNN_TARGET_OPENCL, cv.dnn.DNN_TARGET_OPENCL_FP16, cv.dnn.DNN_TARGET_MYRIAD, cv.dnn.DNN_TARGET_HDDL,
cv.dnn.DNN_TARGET_VULKAN, cv.dnn.DNN_TARGET_CUDA, cv.dnn.DNN_TARGET_CUDA_FP16)
parser = argparse.ArgumentParser(add_help=False)
parser.add_argument('--zoo', default=os.path.join(os.path.dirname(os.path.abspath(__file__)), 'models.yml'),
help='An optional path to file with preprocessing parameters.')
parser.add_argument('--input', help='Path to input image or video file. Skip this argument to capture frames from a camera.')
parser.add_argument('--out_tf_graph', default='graph.pbtxt',
help='For models from TensorFlow Object Detection API, you may '
'pass a .config file which was used for training through --config '
'argument. This way an additional .pbtxt file with TensorFlow graph will be created.')
parser.add_argument('--framework', choices=['caffe', 'tensorflow', 'torch', 'darknet', 'dldt'],
help='Optional name of an origin framework of the model. '
'Detect it automatically if it does not set.')
parser.add_argument('--thr', type=float, default=0.5, help='Confidence threshold')
parser.add_argument('--nms', type=float, default=0.4, help='Non-maximum suppression threshold')
parser.add_argument('--backend', choices=backends, default=cv.dnn.DNN_BACKEND_DEFAULT, type=int,
help="Choose one of computation backends: "
"%d: automatically (by default), "
"%d: Halide language (http://halide-lang.org/), "
"%d: Intel's Deep Learning Inference Engine (https://software.intel.com/openvino-toolkit), "
"%d: OpenCV implementation, "
"%d: VKCOM, "
"%d: CUDA" % backends)
parser.add_argument('--target', choices=targets, default=cv.dnn.DNN_TARGET_CPU, type=int,
help='Choose one of target computation devices: '
'%d: CPU target (by default), '
'%d: OpenCL, '
'%d: OpenCL fp16 (half-float precision), '
'%d: NCS2 VPU, '
'%d: HDDL VPU, '
'%d: Vulkan, '
'%d: CUDA, '
'%d: CUDA fp16 (half-float preprocess)' % targets)
parser.add_argument('--async', type=int, default=0,
dest='asyncN',
help='Number of asynchronous forwards at the same time. '
'Choose 0 for synchronous mode')
args, _ = parser.parse_known_args()
add_preproc_args(args.zoo, parser, 'object_detection')
parser = argparse.ArgumentParser(parents=[parser],
description='Use this script to run object detection deep learning networks using OpenCV.',
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
args = parser.parse_args()
args.model = findFile(args.model)
args.config = findFile(args.config)
args.classes = findFile(args.classes)
# If config specified, try to load it as TensorFlow Object Detection API's pipeline.
config = readTextMessage(args.config)
if 'model' in config:
print('TensorFlow Object Detection API config detected')
if 'ssd' in config['model'][0]:
print('Preparing text graph representation for SSD model: ' + args.out_tf_graph)
createSSDGraph(args.model, args.config, args.out_tf_graph)
args.config = args.out_tf_graph
elif 'faster_rcnn' in config['model'][0]:
print('Preparing text graph representation for Faster-RCNN model: ' + args.out_tf_graph)
createFasterRCNNGraph(args.model, args.config, args.out_tf_graph)
args.config = args.out_tf_graph
# Load names of classes
classes = None
if args.classes:
with open(args.classes, 'rt') as f:
classes = f.read().rstrip('\n').split('\n')
# Load a network
net = cv.dnn.readNet(cv.samples.findFile(args.model), cv.samples.findFile(args.config), args.framework)
net.setPreferableBackend(args.backend)
net.setPreferableTarget(args.target)
outNames = net.getUnconnectedOutLayersNames()
confThreshold = args.thr
nmsThreshold = args.nms
def postprocess(frame, outs):
frameHeight = frame.shape[0]
frameWidth = frame.shape[1]
def drawPred(classId, conf, left, top, right, bottom):
# Draw a bounding box.
cv.rectangle(frame, (left, top), (right, bottom), (0, 255, 0))
label = '%.2f' % conf
# Print a label of class.
if classes:
assert(classId < len(classes))
label = '%s: %s' % (classes[classId], label)
labelSize, baseLine = cv.getTextSize(label, cv.FONT_HERSHEY_SIMPLEX, 0.5, 1)
top = max(top, labelSize[1])
cv.rectangle(frame, (left, top - labelSize[1]), (left + labelSize[0], top + baseLine), (255, 255, 255), cv.FILLED)
cv.putText(frame, label, (left, top), cv.FONT_HERSHEY_SIMPLEX, 0.5, (0, 0, 0))
layerNames = net.getLayerNames()
lastLayerId = net.getLayerId(layerNames[-1])
lastLayer = net.getLayer(lastLayerId)
classIds = []
confidences = []
boxes = []
if lastLayer.type == 'DetectionOutput':
# Network produces output blob with a shape 1x1xNx7 where N is a number of
# detections and an every detection is a vector of values
# [batchId, classId, confidence, left, top, right, bottom]
for out in outs:
for detection in out[0, 0]:
confidence = detection[2]
if confidence > confThreshold:
left = int(detection[3])
top = int(detection[4])
right = int(detection[5])
bottom = int(detection[6])
width = right - left + 1
height = bottom - top + 1
if width <= 2 or height <= 2:
left = int(detection[3] * frameWidth)
top = int(detection[4] * frameHeight)
right = int(detection[5] * frameWidth)
bottom = int(detection[6] * frameHeight)
width = right - left + 1
height = bottom - top + 1
classIds.append(int(detection[1]) - 1) # Skip background label
confidences.append(float(confidence))
boxes.append([left, top, width, height])
elif lastLayer.type == 'Region':
# Network produces output blob with a shape NxC where N is a number of
# detected objects and C is a number of classes + 4 where the first 4
# numbers are [center_x, center_y, width, height]
for out in outs:
for detection in out:
scores = detection[5:]
classId = np.argmax(scores)
confidence = scores[classId]
if confidence > confThreshold:
center_x = int(detection[0] * frameWidth)
center_y = int(detection[1] * frameHeight)
width = int(detection[2] * frameWidth)
height = int(detection[3] * frameHeight)
left = int(center_x - width / 2)
top = int(center_y - height / 2)
classIds.append(classId)
confidences.append(float(confidence))
boxes.append([left, top, width, height])
else:
print('Unknown output layer type: ' + lastLayer.type)
exit()
# NMS is used inside Region layer only on DNN_BACKEND_OPENCV for another backends we need NMS in sample
# or NMS is required if number of outputs > 1
if len(outNames) > 1 or lastLayer.type == 'Region' and args.backend != cv.dnn.DNN_BACKEND_OPENCV:
indices = []
classIds = np.array(classIds)
boxes = np.array(boxes)
confidences = np.array(confidences)
unique_classes = set(classIds)
for cl in unique_classes:
class_indices = np.where(classIds == cl)[0]
conf = confidences[class_indices]
box = boxes[class_indices].tolist()
nms_indices = cv.dnn.NMSBoxes(box, conf, confThreshold, nmsThreshold)
nms_indices = nms_indices[:, 0] if len(nms_indices) else []
indices.extend(class_indices[nms_indices])
else:
indices = np.arange(0, len(classIds))
for i in indices:
box = boxes[i]
left = box[0]
top = box[1]
width = box[2]
height = box[3]
drawPred(classIds[i], confidences[i], left, top, left + width, top + height)
# Process inputs
winName = 'Deep learning object detection in OpenCV'
cv.namedWindow(winName, cv.WINDOW_NORMAL)
def callback(pos):
global confThreshold
confThreshold = pos / 100.0
cv.createTrackbar('Confidence threshold, %', winName, int(confThreshold * 100), 99, callback)
cap = cv.VideoCapture(cv.samples.findFileOrKeep(args.input) if args.input else 0)
class QueueFPS(queue.Queue):
def __init__(self):
queue.Queue.__init__(self)
self.startTime = 0
self.counter = 0
def put(self, v):
queue.Queue.put(self, v)
self.counter += 1
if self.counter == 1:
self.startTime = time.time()
def getFPS(self):
return self.counter / (time.time() - self.startTime)
process = True
#
# Frames capturing thread
#
framesQueue = QueueFPS()
def framesThreadBody():
global framesQueue, process
while process:
hasFrame, frame = cap.read()
if not hasFrame:
break
framesQueue.put(frame)
#
# Frames processing thread
#
processedFramesQueue = queue.Queue()
predictionsQueue = QueueFPS()
def processingThreadBody():
global processedFramesQueue, predictionsQueue, args, process
futureOutputs = []
while process:
# Get a next frame
frame = None
try:
frame = framesQueue.get_nowait()
if args.asyncN:
if len(futureOutputs) == args.asyncN:
frame = None # Skip the frame
else:
framesQueue.queue.clear() # Skip the rest of frames
except queue.Empty:
pass
if not frame is None:
frameHeight = frame.shape[0]
frameWidth = frame.shape[1]
# Create a 4D blob from a frame.
inpWidth = args.width if args.width else frameWidth
inpHeight = args.height if args.height else frameHeight
blob = cv.dnn.blobFromImage(frame, size=(inpWidth, inpHeight), swapRB=args.rgb, ddepth=cv.CV_8U)
processedFramesQueue.put(frame)
# Run a model
net.setInput(blob, scalefactor=args.scale, mean=args.mean)
if net.getLayer(0).outputNameToIndex('im_info') != -1: # Faster-RCNN or R-FCN
frame = cv.resize(frame, (inpWidth, inpHeight))
net.setInput(np.array([[inpHeight, inpWidth, 1.6]], dtype=np.float32), 'im_info')
if args.asyncN:
futureOutputs.append(net.forwardAsync())
else:
outs = net.forward(outNames)
predictionsQueue.put(np.copy(outs))
while futureOutputs and futureOutputs[0].wait_for(0):
out = futureOutputs[0].get()
predictionsQueue.put(np.copy([out]))
del futureOutputs[0]
framesThread = Thread(target=framesThreadBody)
framesThread.start()
processingThread = Thread(target=processingThreadBody)
processingThread.start()
#
# Postprocessing and rendering loop
#
while cv.waitKey(1) < 0:
try:
# Request prediction first because they put after frames
outs = predictionsQueue.get_nowait()
frame = processedFramesQueue.get_nowait()
postprocess(frame, outs)
# Put efficiency information.
if predictionsQueue.counter > 1:
label = 'Camera: %.2f FPS' % (framesQueue.getFPS())
cv.putText(frame, label, (0, 15), cv.FONT_HERSHEY_SIMPLEX, 0.5, (0, 255, 0))
label = 'Network: %.2f FPS' % (predictionsQueue.getFPS())
cv.putText(frame, label, (0, 30), cv.FONT_HERSHEY_SIMPLEX, 0.5, (0, 255, 0))
label = 'Skipped frames: %d' % (framesQueue.counter - predictionsQueue.counter)
cv.putText(frame, label, (0, 45), cv.FONT_HERSHEY_SIMPLEX, 0.5, (0, 255, 0))
cv.imshow(winName, frame)
except queue.Empty:
pass
process = False
framesThread.join()
processingThread.join()