Does Ip Camera Provide Link Opencv

In the previous blogs, y'all have seen OpenCV used with Python in various applications similar epitome processing, confront detection, object detection, gesture recognition, object tracking, motion detection, etc.

OpenCV is an Open up Source Computer Vision library, as it provides various functions, to perform all of the applications, like read, write, display the images, edge detection, contour detection, and many more than. All these functions work for both images and videos either saved media or live streaming. (To know more nigh OpenCV and its application and functions, learn from hither).

For live streaming, you can either utilise a spider web camera or some external camera like Pi photographic camera, or android camera. This article is about how to access the android camera with the help of OpenCV in python and later will perform some of the common OpenCV applications.

Comparing Cases of Web Camera and External Camera

When using the spider web camera for whatsoever application then information technology's limited to one identify as yous cant carry it everywhere all the time for testing. Simply this is not the example with the external camera, as you tin can conduct it anywhere with placing organization in i place, so it makes it flexible for testing.
Some other used instance is when you want to test your code in the dining hall, just you can't equally your organisation is in your room but if you employ an external camera then it'due south possible for yous.
Apart from this if you want to proceed procedure everything going on in your business firm/offices by sitting in your room and so also this can be possible past using an external camera, obviously, replacement if CCTV, similar face detection, face recognition, object detection, motility detection, and many more.

Pre-requisite

Python 3
OpenCV
Numpy
Install IP webcam on your android device
Jupyter notebook or whatever other lawmaking editor like vscode, sublime.

Getting Started

Connect your PC/laptop and android device to the same wifi,
Open the app on your telephone,
Navigate through the app and select the option Start server at the bottom,
Annotation down the IP address that appears on the screen,
Paste the same in the browser and and so a folio will open where you tin can control the camera of your telephone with the available options there.

IP webcam controller in browser

As from the above image, it'south clear that with the IP address there is a number of options available to command the android camera from the laptop similar the fashion CCTV cameras.
Capture image, focused image, can salvage it to the storage, video recording, live streaming in the laptop as seen in the below figure,

Live streaming from android in laptop

As well can toggle wink and front camera from the browser.

Admission Android Camera with OpenCV

At the meridian of the page in the browser move to Video return selection and then select Javascript and and so re-create the image address by right click on that, as it will be helpful to access the camera in OpenCV.

Get the image address in JavaScript style

Open Jupyter notebook and get started with coding;

Import the required packages
- Urllib- This parcel will allow us interacting with net websites by their URL address. It provides unlike modules to open, parse the URLs as seen in the below image.

urllib packages in Python Sources

CV2 - OpenCV package to deal with the images equally to brandish the images captured from the camera or y'all tin can term this as live streaming.

Import the libraries

Shop the image address from the higher up in a variable URL.

Image address for live streaming

First the while loop till any key volition be pressed to terminate the same, Q in this case. Adjacent access the image from the URL using urlopen() function, bypassing the above URL as an argument and it will return and information technology will return http.client.HTTPResponse object.
Adjacent, convert the object into NumPy and later on, we will utilise cv2.imdecode() to convert the array into an image format from the streaming information.
At present its time for alive streaming using cv2.imshow() from android's camera in python.

Alive streaming from the android camera using OpenCV

Once y'all will exist done with the to a higher place process, at present you can any computer vision application with your android photographic camera similar object detection, motion tracking, face recognition, etc . Without investing in CCTV cameras you can spy your house by sitting in one place with your android phone.

OpenCV applications with the android photographic camera

Face up Detection

Import the required libraries
Load the pre-trained haar cascade classifier for face detection from the storage.

Load the haar cascade classifier for face detection

Follow the same code to access the streaming image.

Become the streaming prototype

Catechumen the epitome into the grayscale format and then use "usign classifier" object to detect the faces present in the streaming image and shop all of the coordinates which will be used to plot bounding boxes on the detected faces.

Alive streaming of face detection from android phone

Motion Detection

The terminal article covered alive motion detection using OpenCV with the help of a spider web camera merely it has several limitations as discussed above considering it will bound to use at only one place. Instead, utilize your Android camera to keep track of changes at any place apropos a detail frame at a detail fourth dimension.

Let'southward suppose you are doubting that someone backside yous makes changes in your workplace but yous can't exist able to effigy information technology out as CCTVs are too costlier to afford but this arroyo is more than economic and easier to keep track of of victim.

Import all the required libraries
Assign static frame with the frame concerning the one you lot want to compare all other frames, in this case initially it will be none, and once a camera beginning it will initialize to the first frame.

Import the required modules

Load the streaming image into image format from the URL using urllib modules.

Store the streaming image into an prototype format

Convert the image into a grayscale format followed by the paradigm blurring using cv2.GaussianBlur() function, to detect motion changes.
The next footstep is to the calculation of the departure between the static frame and image from streaming by an android camera which further if crosses the set threshold, demonstrates the motion detection. Subsequently on, using contour detection bounding boxes will exist plotted on the region of movement in the image.

Steps for motion detection

Hither is the completed code along with the output.

Completed code for live motion detection using Android Photographic camera

Conclusion

OpenCV, a computer vision library, is open-source with several functions available to perform the different applications, make everything easy and effective. Also, it's fast in computation as compared to other available languages similar MATLAB.

OpenCV tin can exist used for images as well every bit videos either from the storage or from the live streaming using a web- photographic camera or external camera. This blog has been specifically designed to employ OpenCV with an external camera i.east. android camera past using tertiary party application IP Webcam on the aforementioned network i.east. both the android device and laptop/PC.

With this, you can attempt different computer vision approaches like keep spying of your house in your absence, or when you lot come dorsum to your place. Object detection, facial recognition, motility tracking, and many others.

Source: https://www.analyticssteps.com/blogs/streaming-android-camera-using-opencv

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