Temperature detection opencv. it has 32x24 resolution with a 110 x 75 Field of View. Therefore, face mask detection has become a crucial task to help global society. e. maxThreshold = 200 # Filter by Area. The parameters α > 0 and β are often called the gain and bias parameters; sometimes these parameters are said to control contrast and brightness respectively. applyColorMap(heat_map. You can think of f(x) as the source image pixels and g(x) as the output image pixels. The method that I currently use involves converting the image from RGB color space to YCbCr color space and classifying pixels as skin pixels if they happen to fall within certain range of Y, Cb and Cr. Canny edge detection. Image Not Working. Method #1: OpenCV + matplotlib. Apr 5, 2019 · Luckily in OpenCV, this whole model is already pre-trained for face detection. pbtxt files. Initially written in C++, it can also be used with languages like Python, C, and Java. SimpleBlobDetector_Params() # Change thresholds params. The code references two XML files ( haarcascade_frontalface_default. This is also termed as connectivity of pixels. Extract the downloaded model and note the path to the frozen_inference_graph. 8. Loading images and models with a vocabulary. #!/usr/bin/python # Standard imports import cv2 import numpy as np; # Read image im = cv2. #PyresearchReal-time Temperature Mapping with a Thermal Camera using Python and OpenCV" is an exciting computer vision project where we learn to use a therma contributing to the best working unit for “Automatic Face Mask And Temperature Detection System” has been designed perfectly. Canny (). Jun 1, 2022 · MLX90640 Temperature acquisition module. Jan 8, 2013 · Canny Edge Detection is a popular edge detection algorithm. import cv2. 2 and 97. Sep 19, 2020 · Step 4: Convert the image to gray image as OpenCV face detector expects gray images. The imread() function simply loads the image from the specified file in an ndarray. Colour detection is necessary to recognize objects, it is also used as a tool in various image editing and drawing apps. Jan 25, 2019 · The Canny edge detector is an edge detection operator that uses a multi-stage algorithm to detect a wide range of edges in images. Aug 29, 2023 · this pyimgsearch post uses a simple linear approximation, maybe you can start similar, to test & calibrate your real-world hw: (1) Temperature (°C) = (Gray_16_value)/100 (C) – Absolute_zero (C). OpenCV is a powerful, open-source image processing library that is widely used in industry, as well as in research and development. For #2, once we detect the contour, we can use moments to determine the radius. a 16-bit integer). The competition provides a dataset comprising video files with corresponding annotations for fire and smoke presence. This repository contains the solution for the Fire Detection Competition, where participants develop machine learning models to detect fire in videos. CV_16UC1 ), but it might not be supported by certain functions. py script. Measure temperature for a thermal image using Python and OpenCV. Now, the temperatue is based on only some mathematical operation. imshow('frame',thresh1) if cv2. cvtColor(imgtest1, cv2. Dec 3, 2022 · In this video, part 3 of this INFRARED BASICS COURSE, I show you HOW to:1) Thermal face detection with Haar Cascades2) Implement a fever detector in a therma Mar 23, 2019 · Detection of people from above with Thermal Camera. Secondly, using OpenCV for mask detection and python language. The chip OpenCV provides a real-time optimized Computer Vision library, tools, and hardware. The second parameter is the marker id, in this case the marker 23 of the dictionary cv::aruco::DICT_6X6_250. Stars. Thus, we will be detecting any specific colors during live video streaming. Its arguments are: img - Input image. I am using the code below for face detection. However, there appears to be a bug in the implementation in OpenCV 3. xml and haarcascade_eye. params = cv2. Below you can see the syntax of this function: Canny(image, low_threshold, high_threshold) Let’s apply it to our image by specifying threshold values (a low and a high threshold). There are 8-connectivity and 4-connectivity available in OpenCV Jul 30, 2020 · How can I convert RGB values of the thermal image into Celsius or kelvin temperature in python? Here is the thermal image taken by a FLIR device: Here I am reading image using OpenCV and getting the RGB values from it but I don't know how to convert these RGB values to temperature: Jul 1, 2014 · roi = img[y:y+h,x:x+w] roismall = cv2. OpenCV has the function cv. get_cmap. This method is completely different from other ESP32 Jan 20, 2021 · Let’s look at the example image in Figure 1: Figure 1: This image is 600 pixels wide and 450 pixels tall for a total of 600 x 450 = 270,000 pixels. png image: And here is the result for the box_in_scene. face_detection. Apr 12, 2022 · You can’t ignore YOLOv5! YOLOv5 has gained much traction, controversy, and appraisals since its first release in 2020. 2 days ago · The first parameter is the cv::aruco::Dictionary object previously created. See issues for remaining work. Jun 6, 2020 · But I have a question I want to determine the temperature of the face with a Raspberry 4 and two cameras one normal, the other thermal (MLX90640). com https://www. Now we know about feature matching. Open up the basic_connected_components. imread("blob. The ESP32 Based Camera Module developed by AI-Thinker. I am trying to determine if contour detection or Sep 16, 2019 · 5. After setting the input for the model, we perform object detection using the forward () function. You can use this code to find the HSV value of any pixel from your source image. Apr 7, 2021 · img_mapped = cv2. image-processing. Mat image = imread ( "path/to/text_rec_test. Image gradients are a fundamental building block of many computer vision and image processing routines. The MLX90640 module is a 24×32-pixel infrared array sensor with a total of 768 measurement pixels, small size, and low power consumption [2]. Jan 4, 2021 · In the main function we now can call our dense_optical_flow wrapper to start the Farneback’s demo with cv2. This is the code I made for the heat map generation: ret,frame = cap. waitKey(100)&0xFF==ord('q'): break. 2. I am trying to extract all the skin pixels in the image. I would like to identify in the image where the 97. This has been previously utilized in the detection of inflammation and nerve dysfunctions. You can detect colors seen by the camera, not the paint color. From the image above, it is obvious that we can't use the same window to detect keypoints with different scale. x. assignments Nov 4, 2023 · Real-time Temperature Detection with Python and OpenCV: A Computer Vision Project #Pyresearch#computervision #python #opencv #temperaturedetection Identity recognition is based on OpenCv, using the Face Recognition face recognition framework to complete the identity recognition; body temperature detection is based on image registration, and the face position is mapped to the infrared image in real time through affine transformation, and finally the temperature of the Mar 13, 2017 · The function selectROI also allows you to select multiple regions of interest, but there appear to be two bugs. Scale-space Extrema Detection. We’re now ready to load our input image and initialize our Selective Search algorithm: # load the input image. minThreshold = 10 params. This shouldn't be necessary; Canny ought to take care of this. Oct 25, 2021 · I want to detect temperature from thermal images and plot/mark the area where the temperature is detected above the threshold. The MLX90614 body temperature sensor is used for this purpose. Your "open" circles have two edges, an inner and outer edge. In this tutorial, we will learn how to build a motion detected alarm system using OpenCV in Python. So the basic idea for plotting a heat map is to visually get some feedback for the probability of a given particular event, You may write your own method which may take probability in range 0-1 and output a color in range (255, 0, 0) - (0, 0, 255). Aug 16, 2023 · This paper presents a new Edge-AI algorithm for real-time and multi-feature (social distancing, mask detection, and facial temperature) measurement to minimize the spread of COVID-19 among individuals. g. It has a built-in 520 KB SRAM with an external 4M PSRAM. The Raspberry Pi processes the thermal image data using OpenCV, applies a color map for visualization. I. In that software I changed "color->Temperature" setting and set the value to 80 or something. Dec 25, 2019 · 34. 3. int rgb = IMREAD_COLOR; // This should be changed according to the model input requirement. Then it continuously monitors and displays the highest temperatures and condition (“ Normal Mar 20, 2017 · So basically I need to come up with an equation to convert this heat map into temperatures. Mid-Far Infrared Images (today’s tutorial) Thermal Vision: Measuring your First Temperature from an Image with Python and OpenCV. . Wearing a protective face mask has become a new normal. COLORMAP_JET) cv2. Jan 9, 2018 · updated Jan 9 '18. Step #2: Apply our face mask detector to each face. Its GPIO Pins have support like UART, SPI, I2C, PWM, ADC, and DAC. astype('uint8'), cv2. ⚠️ This is an incomplete prototype. // Load a cropped text line image. We then prepare an input blob by resizing and normalizing the image. The problem with this approach is that a face mask, by definition, obscures part of the face. It is time to learn how to match different descriptors. 7 ° C. Note that each dictionary is composed of a different number of markers. Jan 8, 2013 · We know a great deal about feature detectors and descriptors. Also by redesigning the image processing algorithm for thermal image processing, it is possible to detect the temperature radiation of a person. imshow('norm',img) key = cv2. The difference between start time t1 and end time t2, dt1, is what we are interested in as it ‘s the time taken by our face detector to detect faces. If Opencv is installed on your computer then you are good to go. Imports. face_detection = mp. This type of image is supported by OpenCV (e. Hii. edited Oct 25, 2021 at 11:35. This paper presents a simplified Oct 31, 2022 · Object Detection with Deep Learning Through PyTorch and YOLOv5. blockSize - It is the size of neighbourhood considered for corner detection. May 13, 2021 · Testing the Face Mask Detection. Modified 3 years, 4 months ago. png", rgb); Nov 1, 2021 · Body temperature is tested only when the people's total count inside a room is less than the given limit. FaceDetection() May 4, 2020 · Step #1: Perform face detection. Fever is a contactless fever thermometer with auto-aim. I'm not sure what camera you're using, but with the Kinect v1. 5 Radiometric long-wave infrared sensor connected to the SPI port of a Raspberry Pi 3. May 4, 2024 · The project uses MLX90640 Thermal Camera to detect and visualize thermal hotspots that exceed a specified temperature threshold, suggesting a fever. Create a folder in the Home directory of your Raspberry Pi with any name such as “ Face Recognition “. 0 to construct my model, specificly, I used MobileNet and Transfer Learning . py file in your project folder, and let’s get to work: # import the necessary packages. As a final test, let’s supply an image of a beach/coast to the anomaly detector: $ python test_anomaly_detector. Blob extraction: Blobs extraction is the process of separating the objects in the binary image. It is OK with small corner. Jan 8, 2013 · Here is the result of the feature detection applied to the box. OpenCV provides two techniques, Brute-Force matcher and FLANN based matcher. You can distinguish those two whites using your code with inRange, if you control illumination, so the same color looks always the same way. Furthermore, OpenCV is also compatible with various operating systems like Windows, Linux Lepton 2. To read an image in, we will use the imread() function, along with the path to the image we want to process. Mask Detection In this part, I used Tensorflow2. May 4, 2024 · 1. adaptiveThreshold() or Otsu's thresholding. Canny in. We have already seen this in previous chapters. It is a multi-stage algorithm and we will go through each stages. Canny(input_img, lower_bound, upper_bound) Finding the right balance between the lower bound and upper bound can be tricky. Convert BGR to HSV color space. Most pixels are represented in two ways: In a grayscale image, each pixel has a value between 0 and 255, where 0 corresponds to “black” and 255 being “white. model \. Canny in 1986. I am trying to narrow the temperature range from -40 - 300 to a better range of 6 - 20. Inrange between the color range to detect. Dec 31, 2019 · Vehicle Speed Detection using OpenCV and pythonTO DOWNLOAD THE PROJECT CODECONTACT www. Watch tag. My camera model is AP-TI003 - Non-contact AI Binocular Thermal Imaging Camera Optical Bi-spectrum Fever Detection CCTV IP I was working on the skin detection in OpenCV. It should be grayscale and float32 type. With OpenCV installed, we can import it as cv2 in our code. algorithm == 'farneback': method = cv2. Also, we use a different image that will actually help us visualize the results of the algorithm. I am using openCV and Python to make a computer vision application that detects hotspots in an image from thermal cameras. x, the infrared image is greyscale and has a pixel type of unsigned short int (e. imread(args["image"]) # initialize OpenCV's selective search implementation and set the. For this it's where ever the temperature is above 160 (min is 0 and max is 255) May 29, 2023 · Overview. # construct the argument parser and parse the arguments. We have been experimenting with YOLOv5 for a while Oct 5, 2013 · You can do this in three steps: Load frame. OpenCV (Open Source Computer Vision Library) is an open-source computer vision and machine learning software library. The most straightforward way is to loop over the contour points manually, and draw a circle on the detected contour coordinates, using OpenCV. Plug in your webcam into one of the USB ports of your Raspberry Pi. To see real-time COVID-19 face mask detector in action, connect Raspberry Pi Camera module with Pi as shown below: Launch the detect_mask. Here's a simple approach. Canny also produced a computational theory of edge detection explaining why the technique works. Oct 10, 2022 · This tutorial is the 1st in a 4-part series on Infrared Vision Basics: Introduction to Infrared Vision: Near vs. Code. It can be integrated with IR Camera to get the actual temperature. The remote is a false-positive detection but looking at the ROI you could imagine that the area does share resemblances to a remote. Measure temperature for a thermal video by analyzing a sequence of gray 16 images. Questions tagged [edge-detection] Edge detection is a tool in computer vision used to find discontinuities (edges) in images or graphs. Nov 5, 2016 · 13. python-3. It is not a medical device. destroyAllWindows() In this example, we first load an image and the pre-trained SSD model. This means that it is converted from standard 3-channel RGB color codes, with 3 values between 0 and 255 defining a color, into an image Nov 17, 2014 · Image Not Working. Let's mix it up with calib3d module to find objects in a complex image. We will be using two main libraries, namely, OpenCV and pyttsx3. ; Edit. facebook. Jan 20, 2020 · This tutorial presents an intro to anomaly detection with OpenCV, computer vision, and scikit-learn. One function that comes to mind is applyColorMap. COVID-19 has extenuated the need for an intelligent surveillance video system that can monitor the status of social distancing, mask detection, and measure the temperature of faces Mar 30, 2024 · OpenCV or open-source Computer Vision Library is a Python library designed to help developers seamlessly integrate computer vision applications with machine learning. ksize - Aperture parameter of the Sobel derivative used. Sep 24, 2020 · Detecting Faces in an Image Using OpenCV. COLORMAP_JET) # img1[heat_map > 160] = img_mapped[heat_map > 160] Use this line to draw the heat map on the original video at a specific temperature range. To satisfy your requirements for #1, we can use a minimum threshold area to determine if the flake exists. Jan 8, 2013 · There are mainly four steps involved in SIFT algorithm. This project is all about Color Detection & Tracking with ESP32 CAM Module & OpenCV. Mar 20, 2023 · cv2. 2, 0] # default Farneback's algorithm parameters. Jan 14, 2021 · How to measure temperature with thermal camera using python? Asked 3 years, 4 months ago. It uses an MLX90614 sensor to monitor body Nov 12, 2018 · Figure 3: YOLO object detection with OpenCV is used to detect a person, dog, TV, and chair. To implement a grayscale (1-channel) -> heatmap (3-channel) conversion, we first load in the image as grayscale. You may be interested in using the COLORMAP_JET: Jun 1, 2015 · 1 1 2. This repository contains a Convolutional Neural Network (CNN) implementation for detecting temperatures in Flir images. The controller is based on a 32-bit CPU & has a combined Wi-Fi + Bluetooth/BLE Chip. In this case, the valid ids go from 0 to 249. Step 1: Download a Pre-trained Model. So I tried to do some adjustment in the images because you can see that skin color range is not even visible,so I edited the pic in Windows Photos Application in Window 8. In this tutorial, you will learn about image gradients and how to compute Sobel gradients and Scharr gradients using OpenCV’s cv2. The pandemic has been going on for a while, stores and schools are required to keep track of the people's body temperature to perform preliminary filtration of those who may be in abnormal health conditions. The image above contains a person (myself) and a dog (Jemma, the family beagle). matlabprojectscode. If both are low - you'll have few edges. I am using YCrCb color range for detection. By default, OpenCV reads in an image as 3-channel, 8-bit BGR. So, make sure to integrate an IR and test before doing anything further. It was developed by John F. pip3 install picamera. I have a MLX90640 thermal camera 13' above the ground. 5, 3, 15, 3, 5, 1. In our previous tutorial, we covered how we can apply, in a real solution, the temperature measured from a thermal image using Python, OpenCV, and a traditional Machine Learning method. Since edge detection is susceptible to noise in the image, first step is to remove the noise in the image with a 5x5 Gaussian filter. The output image was this. png image: Generated on Mon May 27 2024 23:26:53 for OpenCV by 1. We will be using default pre-trained models to detect face, eyes and mouth. 13 Sep 17, 2022 · 2. Since they're fairly close, the Canny gauss filter might add them together. Viewed 1k times. Utilize a thermal camera to measure temperature in real-time. New image to demonstrate the CHAIN_APPROX_SIMPLE contour detection algorithm. If it doesn't, you'll have two edges close together. To install these libraries using pip, use the commands given below: Jul 30, 2021 · First thing, painted colors change with light. For testing the Live Video streaming in Python. Mar 25, 2012 · Edge detection after noise removal (erae/dilate). The next step simply is to locate the pre-trained weights. They could be captured in various lighting conditions. Here I've attached two youtube links: Nov 17, 2023 · Edge Detection on Images with cv2. 3 watching Forks. And also the system able to detects the body temperature using DHT11 sensor, IR sensor. Apr 22, 2023 · Welcome to this tutorial on ESP32 CAM Based Object Detection & Identification with OpenCV. Recently, YOLOv5 extended support to the OpenCV DNN framework, which added the advantage of using this state-of-the-art object detection model – Yolov5 OpenCV DNN Module. Thanks for replying. COVID-19 pandemic has rapidly affected our day-to-day life disrupting the world trade and movements. com/in/ahmed-ibrahim-93b49b190===== what's up number +2 01210894349 ===== Dec 21, 2022 · A Logitech C930e webcam with a resolution of 1080p at 30fps was used to capture facial data, which was then processed on a Raspberry Pi 4 microprocessor. Infrared thermography provides a digital image showing temperature patterns. Initially I created a code in which I read the BGR value at the highest point of the bar and look for this combination in the rest of the image, this didn't return anything. py --model anomaly_detector. Copy the IP Address. waitKey(0) cv2. Thermal-Face Detection. calcOpticalFlowFarneback. , mask detection. It was working fine for most of the image but in one case it was not working. Our anomaly detector correctly labels this image as an outlier/anomaly. Images are not pre-known. It also supports model execution for Machine Learning (ML) and Artificial Intelligence (AI). I think what you're looking for is cv2. For this tutorial, we’ll use the ssd_mobilenet_v2_coco model. Jun 29, 2020 · In most cases, the fast method will be sufficient, so it is set as the default method. Jan 8, 2013 · Two commonly used point processes are multiplication and addition with a constant: g(x) = αf(x) + β. What you are trying to do is pretty difficult. The main idea is to use a large median blur to Nov 12, 2023 · ESP32 Camera Video Streaming Test in Python OpenCV: After uploading the program, restart your ESP32 Camera Module, then open the Serial monitor, and wait for the ESP32 Camera module to connect. We’ll need OpenCV for all the image handling tasks, uuid for generating random filenames for each collected data, and mediapipe for face detection. First, download a pre-trained model from the TensorFlow Model Zoo. Object Detection is the process of using an image and or video feed as your input through your model, and that model Apr 19, 2023 · To detect edges in this image you can apply the Canny edge detection algorithm implemented in OpenCV using the function cv2. 6 stars Watchers. filterByArea = True params Jul 12, 2016 · 6. 5 forks Report repository Releases By installing the new Ubuntu OS, and using the combination of Python & openCV the face mask detection can be implemented with a set of algorithms. An image of the thermometer that you want to read would help, and some ideas that you have tried and why they don't work. There are some models of automatic thermal scanners on the market with the lowest price starting from 1500 USD. Star 1. OpenCV was built to provide a common infrastructure for computer vision applications and to accelerate the use of machine perception in commercial products. jpg") # Setup SimpleBlobDetector parameters. applyColorMap(frame,cv2. Readme Activity. Thermal Image will be input (attached) and expected output --> mark the area where temperature is above threshold. linkedin. read() thresh1 = cv2. My question is how can I determine the temperature of the face with the thermal camera every time the normal camera detects a face? May 4, 2020 · In this example, the sidebar indicates a temperature range between 33. import argparse. image = cv2. imshow('Objects Detected', image) cv2. Oct 24, 2022 · Image Gradients with OpenCV (Sobel and Scharr) May 12, 2021. # input image. After a few seconds, you should see your camera view pop-up window. imgtest = cv2. 2 days ago · Harris Corner Detector in OpenCV. jpg and performs blob detection with different parameters. (Wikipedia) The Canny edge detection algorithm is composed of 5 steps Nov 20, 2020 · This will result in and output of your class name and the probability score. 7 ° C point is. For object detection, we will use the cvlib Library, which utilizes a pre-trained AI model on the COCO dataset to detect 2 days ago · The first parameter is the cv::aruco::Dictionary object previously created. Then a series of image processing and computer vision techniques are employed to detect the shape of the room, as follows: First, the image is binarized. If the person's body temperature is too high, the door will not open; if the person's temperature is average, the door will open and proceed to the next level, i. Use this tag when asking about finding and manipulating edges or edge interaction. com/matlab. resize(roi,(10,10)) cv2. Highlights: Learn the difference between gray aid and gray 16 images in thermal imaging. I am trying to get temperature from Flir thermal camera with Python and OpenCV in real time, as shown in this video. If you illuminate with a red light, white paint will be seen red. The image is basically of a big machinery and I want to get the hottest (in terms of temperature) part of the image. Blob is a group of pixels that are connected and we can check the connectivity of pixels by determining the pixels in its neighbourhood. pyplot. Jan 13, 2020 · OpenCV is a powerful library for image and video manipulation, in this story, I would like to create a motion heatmap useful for detecting movements, the directions of some flows of objects or people and, for example, an aid for architects while projecting common areas. ap = argparse. 2 days ago · Step1. 1. cornerHarris () for this purpose. Issues. i think I am doing this right but am not sure. Canny () Canny's algorithm can be applied using OpenCV's Canny() method: cv2. If you are using a Raspberry Pi camera instead of a webcam, use your ribbon cable to connect it to your Pi. Apr 21, 2021 · متنساش تعملي follow علي linkedInhttps://www. Then, I'll establish end time t2. You will need the following Python OpenCV code. What I thought of till now: Use color quantization (and K-means) to reduce the number of colors to 8. We will see them one-by-one. COLOR_BGR2GRAY) Step 5: Now, we have to load our Haar classifiers (downloaded XML files) for face detection and eye detection, which takes as input the training file of the Haar classifier. ”. Step 2 – Create the Face detector function: # Define mediapipe Face detector. params. calcOpticalFlowFarneback function: Python: elif args. params = [0. You have to hit ENTER twice after the first rectangle. Or Opencv has provision of color-maps. A screenshot from the final result described in this guide. Pull requests. Thermal Vision: Fever Detector with Python and OpenCV (starter project) Aug 23, 2023 · ESP32 CAM Module. If you’d like to know more on Boosting techniques, I invite you to check my article on Adaboost. Here are two methods, one using Matplotlib and one using only OpenCV. pb and mscoco_label_map. The CNN model is trained to analyze thermal images and identify temperature patterns, making it useful for applications such as thermal anomaly detection and temperature mapping. Based on the temperature and mask the system allow the people. So I tried to do some adjustment in the images because you can see that skin color range is not even visible,so I edited the pic in Windows Photos Application In this part, MLX90614 was used as the infrared body surface temperature detection module. If enough of the face is obscured, the face cannot be detected, and therefore, the face mask detector will not be applied. // you can find cropped images for testing in "Images for Testing". 5 Radiometric Sensor with OpenCV HUD Temperature Hot Spot Detection and Avererage Frame Temperature Objective Plantspy is a Python application that interfaces with the FLiR Lepton 2. We will learn how to detect any moving objects using the webcam and sound an alarm for any irregular movements. Feb 22, 2021 · Let’s get started implementing connected component analysis with OpenCV. Jan 6, 2017 · Python: Reads image blob. Apr 24, 2022 · FYP : Social Distancing & Object Detection Using Python, OpenCV, YOLO, Tkinter, TenserFlow by Hamza Farooq FA18-BSE-089 & Ahmar Masood FA18-BSE-018 This is fully based on some image processing techniques using OpenCV, no hardware components are used. Jul 8, 2017 · So before I start finding faces on our test image, I'll note the start time t1, and then I call our function detect_faces. xml) which are Haar cascades used for face and eye detection respectively. But to detect larger corners we need larger windows. waitKey(0) You had better narrow this down or it will surely get closed for being too broad. It combines a thermal camera with face detection from the Thermal Face project. Sobel function. It is believed that IR cameras can potentially be used to detect subjects with fever, the cardinal symptom of SARS, and avian influenza. solutions. Boot your Aug 22, 2020 · Use OpenCV to detect face and temperature of human face Resources. Bug Alert 1: As per the instructions, you can drag a rectangle and then press ENTER and drag another rectangle. ArgumentParser() Dec 28, 2019 · First the PNG of the floor plan is loaded into OpenCV. In the near future, many public service providers will ask the customers to wear masks correctly to avail of their services. be ul vt ee yk li ot ii js eg