# lets import pre trained VGG16 Which is already Builtin for computer vision from tensorflow.keras.applications import VGG16 from tensorflow.keras.layers import Input
# Imagenet is a competition every year held and VGG16 is winner of between 2013-14 # so here we just want limited layers so thats why we false included_top vgg=VGG16(weights='imagenet',include_top=False,input_tensor=Input(shape=(224,224,3)))
# lets save model model.save('detect_Planes.h5')
from tensorflow.keras.models import load_model model=load_model('/content/detect_Planes.h5')
In the MobileNetV2 SSD FPN-Lite, we have a base network (MobileNetV2), a detection network (Single Shot Detector or SSD) and a feature extractor (FPN-Lite).
Base network:
MobileNet, like VGG-Net, LeNet, AlexNet, and all others, are based on neural networks. The base network provides high-level features for classification or detection. If you use a fully connected layer and a softmax layer at the end of these networks, you have a classification.
Example of a network composed of many convolutional layers. Filters are applied to each training image at different resolutions, and the output of each convolved image is used as input to the next layer (source Mathworks)
But you can remove the fully connected and the softmax layers, and replace it with detection networks, like SSD, Faster R-CNN, and others to perform object detection.
Detection network:
The most common detection networks are SSD (Single Shot Detection) and RPN (Regional Proposal Network).
When using SSD, we only need to take one single shot to detect multiple objects within the image. On the other hand, regional proposal networks (RPN) based approaches, such as R-CNN series, need two shots, one for generating region proposals, one for detecting the object of each proposal.
As a consequence, SSD is much faster compared with RPN-based approaches but often trades accuracy with real-time processing speed. They also tend to have issues in detecting objects that are too close or too small.
Feature Pyramid Network:
Detecting objects in different scales is challenging in particular for small objects. Feature Pyramid Network (FPN) is a feature extractor designed with feature pyramid concept to improve accuracy and speed.
# tensor sink signal : new data callback tensor_sink = self.pipeline.get_by_name("tensor_sink") tensor_sink.connect("new-data", self.new_data_cb)
# @brief Callback for tensor sink signal. def new_data_cb(self, sink, buffer): """Callback for tensor sink signal.
:param sink: tensor sink element :param buffer: buffer from element :return: None """
parse쪽은 c 로는 아래의 함수를 쓰면 될 것 같은데
gst_parse_launch GstElement * gst_parse_launch (const gchar * pipeline_description, GError ** error) Create a new pipeline based on command line syntax. Please note that you might get a return value that is not NULL even though the error is set. In this case there was a recoverable parsing error and you can try to play the pipeline.
To create a sub-pipeline (bin) for embedding into an existing pipeline use gst_parse_bin_from_description.
Parameters:
pipeline_description – the command line describing the pipeline error – the error message in case of an erroneous pipeline. Returns ( [transfer: floating]) – a new element on success, NULL on failure. If more than one toplevel element is specified by the pipeline_description, all elements are put into a GstPipeline, which than is returned.
gst_bin_get_by_name GstElement * gst_bin_get_by_name (GstBin * bin, const gchar * name) Gets the element with the given name from a bin. This function recurses into child bins.
Parameters:
bin – a GstBin name – the element name to search for Returns ( [transfer: full][nullable]) – the GstElement with the given name
There are multiple ways of installing IPython. This page contains simplified installation instructions that should work for most users. Our official documentation containsmore detailed instructionsfor manual installation targeted at advanced users and developers. If you are looking for installation documentation for the notebook and/or qtconsole, those are now part ofJupyter.