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computer-vision

Great Reads

Object Tracking: Particle Filter with Ease

by Darko Jurić

SIR Particle Filter brief tutorial with samples in C#

Computer Vision Sandbox

by Andrew Kirillov

An open source application to acquire and process video from cameras

Using Image Classification and Azure Cognitive Services to Build a Digital Forensics Tool

by Allister Beharry

OLAF is a digital forensics tool designed for public-facing PCs or corporate desktops which can classify in near real-time images a user downloads while browsing to help enforce computer use policies regarding intellectual property, inappropriate content, and incitements to violence.

Introducing the TANK AIoT Developer Kit

by Intel

We are excited to announce the availability of the TANK AIoT Dev Kit by iEi, with support for the OpenVINO™ toolkit and Intel® Media SDK.

Latest Articles

Serverless Development Experience for Embedded Computer Vision

by Miguel Angel Cabrera Miñagorri

Learn to create real-time computer vision applications with a couple of Python functions and a model URI.

Solving Real-World Problems with Self-Hosted AI: Unleashing the Potential in Your Applications

by Chris Maunder

Discover the fundamentals of artificial intelligence (AI) and how it can revolutionize your business. Learn about the benefits, applications, and practical use cases to ignite your curiosity

Image to Text with Azure Computer Vision

by Kenji Elzerman

A simple tutorial with some code of how to read text from an image with Azure Computer Vision

Using Image Classification and Azure Cognitive Services to Build a Digital Forensics Tool

by Allister Beharry

OLAF is a digital forensics tool designed for public-facing PCs or corporate desktops which can classify in near real-time images a user downloads while browsing to help enforce computer use policies regarding intellectual property, inappropriate content, and incitements to violence.

All Articles

Computer vision

Object Tracking: Particle Filter with Ease

27 Apr 2015 by Darko Jurić

SIR Particle Filter brief tutorial with samples in C#

computer-vision

image-processing

Computer Vision Sandbox

4 Apr 2019 by Andrew Kirillov

An open source application to acquire and process video from cameras

computer-vision

Using Image Classification and Azure Cognitive Services to Build a Digital Forensics Tool

18 Jul 2019 by Allister Beharry

OLAF is a digital forensics tool designed for public-facing PCs or corporate desktops which can classify in near real-time images a user downloads while browsing to help enforce computer use policies regarding intellectual property, inappropriate content, and incitements to violence.

computer-vision

Introducing the TANK AIoT Developer Kit

29 Jun 2018 by Intel

We are excited to announce the availability of the TANK AIoT Dev Kit by iEi, with support for the OpenVINO™ toolkit and Intel® Media SDK.

computer-vision

product-showcase

Easy Android Camera2 with BoofCV

13 Nov 2018 by lessthanoptimal

This article demonstrates how BoofCV greatly simplifies working with cameras on Android.

computer-vision

Image to Text with Azure Computer Vision

13 Nov 2022 by Kenji Elzerman

A simple tutorial with some code of how to read text from an image with Azure Computer Vision

computer-vision

Serverless Development Experience for Embedded Computer Vision

27 Dec 2023 by Miguel Angel Cabrera Miñagorri

Learn to create real-time computer vision applications with a couple of Python functions and a model URI.

computer-vision

artificial-intelligence

Differences between computer systems technician and software developer

10 Sep 2017 by OriginalGriff

Job titles don't really mean anything, it's the job description that counts, the responsibilities list. And that will vary enormously from company to company. Having said that, the word "technician" generally implies a low-level job with little or no scope for creativity. Remember that the...

computer-vision

Loop calculation not working as expected

29 Oct 2021 by Richard MacCutchan

Try this: foreach ($pay as $val) { $Capital -= $val; echo "Capital value: $Capital\n"; }

computer-vision

How do I store the position of the ball each frame using this code?

24 Jan 2022 by Richard MacCutchan

See 7. Input and Output — Python 3.9.10 documentation[^], which explains how to format values into text, and how to write to a file. You may also like to look at json — JSON encoder and decoder — Python 3.9.10 documentation[^] which is a good way...

computer-vision

Dimension issues in 'template matching'

23 Nov 2022 by CPallini

What about resizing the image: OpenCV Resize image using cv2.resize()[^] ?

computer-vision

image-processing

is ImageFloat32 datatype 1D array or 2D array ?

12 Jan 2015 by Sergey Alexandrovich Kryukov

This is not an array it all, but is a class: http://boofcv.org/javadoc/boofcv/struct/image/ImageFloat32.html[^].Some background: traditionally, bitmap data, as in this class, is considered to be an array of rank 1. The pixel data flows line by line in one stream, without any delimiters...

computer-vision

image-processing

How to do barcode scanning

11 Feb 2015 by Xiao Ling

Here is a case study[^] about how Avision adopts Dynamsoft's barcode SDK to bundle with document scanners. And you can see that the use of Dynamsoft barcode reader SDK is pretty simple:private void btnReadBarcode_Click(object sender, EventArgs e){ this.txtBarcode.Text = ""; ...

computer-vision

Merge multiple Images with openCV

13 Feb 2015 by User 11197367

Hi Folks,I have some perfectly prepared images I want to merge info 1 giant panorama.I did already searched and found this. But I don't really know how to use openCV.I hope that someone of you could explain to me how to use openCV properly so I can merge multiple horizontally...

computer-vision

image-processing

Any example implementations of perspective n - point RANSAC algorithm out there?

15 Apr 2015 by BupeChombaDerrick

Hello,I'am working on a markerless augmented reality engine for mobile devices and the algorithm as to track an observer/camera by solving for [ R | T] given a 3D model of scene and the observed feature point, where R = 3D rotation of observer/camera and T = 3D translation. The solver for...

computer-vision

Augmented-Reality

Any example implementations of perspective n - point RANSAC algorithm out there?

16 Apr 2015 by BupeChombaDerrick

Okay solved this myself, if someone would love to read about pose estimation methods for augmented reality or other applications I think this thesis might be useful http://projekter.aau.dk/projekter/files/14427578/A_Comparison_of_2D-3D_Pose_Estimation_Methods.pdf[^]

computer-vision

Augmented-Reality

Extract surf features in multiple images using matlab?

9 Feb 2016 by Ahsan Abbas

I have 3 images and want to detect and extract SURF features that are common in all images, i know SURF detect features from 2 images at a time, I have made a pairs of 2 images like (2nd,1st)images and (2nd,3rd)images, but the surf gives me different index location for each image pairs how can i...

computer-vision

Extracting color aforge.net rubik's cube

20 Apr 2016 by Eduardo Gabriel

I am making an application that detects the faces of the Rubik's Cube using a webcam. I can apply filters to the blobs, but do not know how to get the color of each blob.I have searched everywhere without success. I use C# Visual Studio 2015 with Aforge.NET //Create color filter ...

computer-vision

Subscripted assignment dimension mismatch error in harris laplace

26 Apr 2016 by GG2905

Hi All,I am working on a project and need to extract corners from the IRIS image. I am not very experienced in MATLAB so found a related code on internet but that is not working properly. Can anyone help me getting this code correct? Please point out the different errors in it. I will be...

computer-vision

Differences between computer systems technician and software developer

10 Sep 2017 by Member 13402989

Is there a big difference between the knowledge of a computer systems technician and a software developer? And what is that difference???????????????? What I have tried: Occupation summary................................

computer-vision

Video input is not processing in OPENCV

8 Jan 2018 by Hassaan_Malik

I have written a code, in which I am supposed to insert a video as input. Then I want to extract the faces, from that video. Then I want to store those detected faces from a video in a folder. But my code is not working. It does not show any output. Does it need any third party software? Please...

computer-vision

image-processing

Existing object detection algorithms for specific case

31 Jul 2018 by Member 13787917

I'm looking for a algorithm (best case in opencv) to detect and track objects in a specific low resolution distance image. The goal is to have a bounding box, which best describes the object. For my use case I only have 16 Regions of Interest. Each RoI gives me the distance of the object in that...

computer-vision

Existing object detection algorithms for specific case

31 Jul 2018 by Kenneth Haugland

Looks like you should use some morphological image processing here. But no method is going to give you a unique answer, as potentially several blobs could be on top of each other.

computer-vision

Existing object detection algorithms for specific case

31 Jul 2018 by Gerry Schmitz

"Tracking" implies "movement"; movement, and therefore "objects", can be detected by comparing frames over time.

computer-vision

How to select ROI in video stream?

9 Jul 2019 by aizhan maksatbek

Can we select a ROI (Region of Image) in the center even if we set as false? Python-OpenCV What I have tried: video = cv.VideoCapture(0) _, frame = video.read() bbox = cv.selectROI(frame, False)

computer-vision

Warp opencv using C++/CLI to a C# console project

5 Dec 2019 by LorenzoGorza

Issue to link c++ opencv project with c# console app. What I have tried: I try to develop a wrapper to link a library of c++ class of image processing methods to a c# console project. In the c++ console app one I've create a class with the opencv include in its header #include...

computer-vision

How to train the object detection tensorflow model from scratch

9 Dec 2019 by Member 14683381

I am using tensorflow object detection model from scratch.How can I do it so that the model trains the network from scratch rather than using a pretrained model. Thanks! gradient_clipping_by_norm: 10.0 fine_tune_checkpoint:...

computer-vision

How do I build a software that can see woodblock and translate in 3d

22 Aug 2020 by vatican-cameo-2020

I am exploring this side of technology trying to have a little fun in this new world. We work on physical wood blocks (usually colored to represent the use of the room) at the beginning of the architecture design. After the initial design, we...

computer-vision

How do I build a software that can see woodblock and translate in 3d

22 Aug 2020 by OriginalGriff

If you have to ask, you aren't anywhere near experienced enough to do this: it's a horribly complicated task, and it needs a lot of development effort. Having said that, there are commercial products available at affordable prices, but you'd...

computer-vision

How to implement a human facial age recognition classifier on opencv?

21 Oct 2020 by Supoh

so i am trying to implement a face detection age classifying agent that detects a face on a photo and then classifies it according to age as 'Old' and 'Young'. So far I have implemented the face recognition class using OpenCV in which I used the...

computer-vision

machine-learning

How to implement a human facial age recognition classifier on opencv?

21 Oct 2020 by Sandeep Mewara

Based on different facial feature you need to define a confidence factor for defining an age. Train the model with datasets (images). Would suggest CNN (Neural Network) for this classification. Quote: In order to evaluate an age detector, you...

computer-vision

machine-learning

In ORB-SLAM, finding translation vector that is coming out a random value

17 Jun 2021 by Narendra Mall

I am trying to find out the translation vector (basically pose estimation) between two consecutive images. Here is what I did in OpenCV (.js): -Take input from the webcam -Get the consecutive images -Find feature in both the image using ORB...

computer-vision

.read() does not work after attempting to jump to frame

21 Oct 2021 by Junwoo Kim

I am trying to jump to a specific frame using openCV. I am doing this by dividing the specific number of the frame by the total number of frames. However, when I enter keyboard inputs to move forward a specific frame, the window crashes. It is...

computer-vision

General conversion from C language to assembly MIPS

7 Nov 2021 by Rick York

I would read this page closely and follow its examples : MIPS Assembly Language Examples[^]

computer-vision

Pytorch: runtimeerror: mat1 dim 1 must match mat2 dim 0 using 2D CNN model with pretrained vgg_16

24 Jan 2022 by farah jabeen

I am working on cardiac CT data (axial, sagittal, coronal). I am using the pre-trained model vgg_16. But I got the following error. According to this error, my dimensions are not correct, but according to my code, I wrote things correctly. Can...

computer-vision

artificial-intelligence

How do I store the position of the ball each frame using this code?

24 Jan 2022 by Isaac Nimco

I recently started on a ball tracking project using open cv and python. I got the tracking to work but I wanted to store the position of the ball every frame in a txt file. Since I am a new developer I had no idea what to do. If you know how to...

computer-vision

Usage of depthwise separable convolutions in gans

4 Feb 2022 by Pasindu Ekanayaka

I'm currently trying to improve the performance of a CycleGAN model which has a couple of downsampling layers and upsampling layers combined with 6 ResNet blocks for the bottleneck. I've added the Depthwise separable convolution implementation...

computer-vision

I want a solution to the problem of displaying thumbnails

9 May 2022 by Rajeev Jayaram

Try adding padding and amend border-radius like, .img-thumbnail img{width:100%;height:auto;box-sizing:border-box;padding:0;border-radius:50%} Hope this helps.

computer-vision

Tensorflow1.14 no gradients providerd for any variables

16 Jun 2022 by Member 15676969

I am using tf1.14 to make a loss function, which project the predicted pose on a 2D image. And then I use the projected point to get the distance transform as loss, I have finished the loss function, but when start training the optimizer gives a...

computer-vision

How to extract only CR no from image

23 Sep 2022 by M@153

Input image I need to extract CR No.from the sample image above. Using Easyocr, I got the output in complex nested list form. How to update the code to filter out all the detected text/numbers and get only CR No. I tried to fetch the text "CR...

computer-vision

image-processing

How to extract only CR no from image

23 Sep 2022 by Richard MacCutchan

Something like: mainlist = [([[212, 26], [314, 26], [314, 50], [212, 50]], 'SCB MEDICAL', 0.998906268787747), ([[36, 56], [84, 56], [84, 80], [36, 80]], '6ein8', 0.19502338570146513), ([[303, 99], [335, 99], [335, 119], [303, 119]], 'OPD',...

computer-vision

image-processing

Dimension issues in 'template matching'

23 Nov 2022 by Apoorva 2022

I'm comparing two images - a complete image & a small part of the same image. If a match is found, then a rectangular box is drawn around that part of the image which contains the smaller image. To implement this, I have used the 'matchTemplate'...

computer-vision

image-processing

Improving output quality of 'imagechops'

7 Dec 2022 by Apoorva 2022

I've implemented 'ImageChops' to find the difference between 2 images. The differences are pointed out in the output accurately, but the picture lacks clarity. Sometimes the contents of the output overlap. Is it possible to point out the...

computer-vision

image-recognition

How do I decrease the size of the tflite model without affecting performance?

21 Mar 2023 by Fatema Shawki

I trained a YOLO v5 object detection model on my custom dataset, then converted it to TensorFlow using the export function and to TensorFlow lite using tf.convertor. I want to use the TFLite model in an android app, however, the problem is the...

computer-vision

object-detection

How to create posearray in halcondotnet (or any htuple of htuples)

23 Mar 2023 by Milchenka

I have HTuple Poses in HalconDotNET that I want to put in a Pose array to use in HOperatorSet.PoseAverage(). Sorry for tag but Halcon tag doesn't exist, this is closest to it as Halcon is CV software. What I have tried: I tried TupleConcat(),...

computer-vision

How to create posearray in halcondotnet (or any htuple of htuples)

23 Mar 2023 by Richard MacCutchan

Since this is a third party library you will probably get better support at the Halcon support forum: HALCON - the powerful Machine Vision Software: MVTec Software[^].

computer-vision

Detectron2 attributes, keep getting attributeerrorr

3 Apr 2023 by m.r.m.40

Hello Before I write the question I'd like to thank you for helping me understand and solve the issue. Here is the problem; I have a python code to detect any object (which most of them don't have pre trained models) on an image regardless of...

computer-vision

image-classification

object-detection

How to Build OpenCV for Windows with CUDA

2 Nov 2018 by Vangos

This post will show you how to build OpenCV for Windows with CUDA.

computer-vision

parallel-processing

Object Tracking: Kalman Filter with Ease

15 Jan 2015 by Darko Jurić

Discrete Kalman Filter brief tutorial with samples in C#

computer-vision

image-processing

Object Feature Tracking in C#

24 Nov 2014 by Darko Jurić

Pyramidal Kanade Lucas optical flow tracker

computer-vision

image-processing

Solving Real-World Problems with Self-Hosted AI: Unleashing the Potential in Your Applications

13 Nov 2023 by Chris Maunder

Discover the fundamentals of artificial intelligence (AI) and how it can revolutionize your business. Learn about the benefits, applications, and practical use cases to ignite your curiosity

computer-vision

artificial-intelligence

Differentiating low and high contrast text images

27 Jun 2016 by Sergey Alexandrovich Kryukov

Unlike many other things in image recognition, the measures of contrast can be objective; always solvable and easy to obtain. You can start here:Contrast (vision) — Wikipedia, the free encyclopedia,Display contrast — Wikipedia, the free encyclopedia.Of course, you cannot use the measure...

computer-vision

image-processing

ِA help to the understand

11 Feb 2015 by Bebo_1

Can anyone help me to understand this part of this document please which is attached !http://www.csd.uwo.ca/~olga/Courses/Fall2014/CS9840/PossibleStudentPapers/pami2010.pdf[^]page[5] Section"c" part "S[1]"[S1] We used a square grid of pooling centres (see Figure 4),with the overall...

computer-vision

image-processing

General conversion from C language to assembly MIPS

7 Nov 2021 by ubutu2334

General conversion from C language to assembly MIPS if(condition) { clause1 } else { clause2 } Thanks What I have tried: condition clause2 j end then: clause1 end: How should I convert without a specific condition?

computer-vision

is ImageFloat32 datatype 1D array or 2D array ?

12 Jan 2015 by Bebo_1

Simple Question ImageFloat32 is datatype used for create image in boofcv library is ImageFloat32 datatype 1D array or 2D array ? Many Thanks Regards

computer-vision

image-processing

How to do barcode scanning

11 Feb 2015 by Jsnaijer

Hey guys,recently i’ve been trying to get more information about barcode reading and I found some softwares that can work for me. I am not an expert (yet :) ) on this field so if you could help me, I’d be very grateful. I found two SDKs, both named as Barcode Scanner SDK, one from Dynamsoft (I...

computer-vision

Differentiating low and high contrast text images

27 Jun 2016 by Member 9379249

Hello everyone,I am a student just started with one image processing project.I am working on OCR and want to reject/handle images based on low and high contrast separately. Currently I am working on differentiating low and high contrast text images. These images are of metallic plates...

computer-vision

image-processing

Separate images of white text and black text.

27 Jun 2016 by Member 9379249

Hello everyone,I am a student currently working in a image processing project.My task is to separate white text and black text images.3.jpg - Google Drive[

computer-vision

image-processing

Separate images of white text and black text.

27 Jun 2016 by Sergey Alexandrovich Kryukov

You just generalized your previous question. But my answer was already general enough: Differentiating low and high contrast text images.I cannot tell you want exact image transformations/filters you have to apply, because it depends on the platform and imagine libraries you are using. But...

computer-vision

image-processing

What is the major differences between puppet inheritance vs puppet composition.?

4 Oct 2017 by Richard MacCutchan

You have the links so you need to study their documentation.

computer-vision

Loop calculation not working as expected

29 Oct 2021 by Member 15358161

Can someone help, don’t know how to solve this using loop in php. What I have tried: $pay = [20, 40 , 89, 300, 190, 15]; $Capital = 1000; I want the loop to achieve this result 1000-20 = 980 980-40 = 940 940-89 = 851 851-300 = 551 ...

computer-vision

I want a solution to the problem of displaying thumbnails

14 May 2022 by ĞĤØŞŢ NASRO

I have a problem when I change the auto value to 100%, the thumbnails appear completely without cropping in the phone mode, and in the desktop mode the pictures do not appear, what is the solution. ------------- This is the line of code: ...

computer-vision

I want a solution to the problem of displaying thumbnails

14 May 2022 by ĞĤØŞŢ NASRO

The bug was found, the value has been changed max-width to 16000 instead of 480, thanks for participating @media only screen and (max-width:480px){ #footer-navmenu ul li a { display: inline-flex; }

computer-vision