Education

Introduction to Computer Vision

After reading this post, you should have a good understanding of computer vision without a strong technical background and you should know the steps needed to solve a computer vision problem.

What is Active Learning?

Machine learning algorithms are exceptionally data-hungry, requiring thousands – if not millions – of examples to make informed decisions. Providing high quality training data for our algorithms to learn is an expensive

Google Researchers Say Underspecification is Ruining Your Model Performance. Here's Five Ways to Fix That.

We read that Google underspecification paper so you don't have to.

Bringing Street Murals to Life with Computer Vision

In Bedford–Stuyvesant, Brooklyn (BedStuy), Yuri Fukuda regularly walks by a mural that showcases prominent female leaders. Since October 2005, a stunning 3,300 square foot mural, When Women Pursue

YOLOv4 - Ten Tactics to Build a Better Model

The YOLO v4 repository is currently one of the best places to train a custom object detector, and the capabilities of the Darknet repository are vast. In this post, we discuss and implement ten advanced tactics in YOLO v4 so you can build the best object detection model from your custom dataset.

Evaluating Object Detection Models with mAP by Class

When evaluating an object detection model in computer vision, mean average precision is the most commonly cited metric for assessing performance. Remember, mean average precision is a measure of our

How to Use the Detectron2 Model Zoo (for Object Detection)

Detectron2 is Facebook's open source library for implementing state-of-the-art computer vision techniques in PyTorch. Facebook introduced Detectron2 in October 2019 as a complete rewrite of Detectron (which was implemented in

How This Fulbright Scholar is Using Computer Vision to Protect Endangered Species

The below post is by Kasim Rafiq, a conservationist, Fulbright Scholar, and National Geographic Explorer studying at UC Santa Cruz. Kasim holds a PhD in Wildlife Ecology from Liverpool John

How to Create Your Own Train Test Split in Roboflow

In order to ensure our models are generalizing well (rather than memorizing training data), it is best practice to create a train, test split. That is, absent rigor, our models

Luxonis OAK-D - Deploy a Custom Object Detection Model with Depth

We are pretty excited about the Luxonis OpenCV AI Kit (OAK-D) device at Roboflow, and we're not alone. Our excitement has naturally led us to create another tutorial on how to train and deploy a custom object detection model leveraging Roboflow and DepthAI, to the edge, with depth, faster.

Behind the Design of an Augmented Reality Board Game App

During the summer of 2019, I received a Facebook message from Roboflow co-founder Brad Dwyer asking me if I wanted to design a new mobile app he was working on.

How to Save and Load Model Weights in Google Colab

Google Colab is Google's hosted Jupyter Notebook product that provides a free compute environment, including GPU and TPU. Colab comes "batteries included" with many popular Python packages installed, making it

Using Computer Vision to Help Deaf and Hard of Hearing Communities

The below post is a lightly edited guest post by David Lee, a data scientist using computer vision to boost tech accessibility for communities that need it. David has open

Introducing an Improved Shear Augmentation

Today, we introduce a new and improved shear augmentation. We'll walk through some details on the change, as well as some intuition and results backing up our reasoning.

How Tesla Teaches Cars to Stop

Creating successful computer vision models requires handling an ever growing set of edge cases. At the 2020 Conference on Computer Vision and Pattern Recognition (CVPR), Tesla's Senior Director of AI,

Glossary of Common Computer Vision Terms

Computer Vision (and Machine Learning in general) is one of those fields that can seem hard to approach because there are so many industry-specific words (or common words used in novel ways) that it can feel a bit like you're trying to learn a new language when you're trying to get started.

What is a Label Map?

In this post, we will demystify the label map by discussing the role that it plays in the computer vision annotation process. Then we will get hands on with some real life examples using a label map.

Getting Started with LabelMe - Computer Vision Annotation

In this post, we will walk through how to jumpstart your image annotation process using LabelMe, a free, open source labeling tool. Labeling images from the public aerial maritime dataset

What the heck is an annotation group?

If you're wondering this, you're not alone. The annotation group is the category that encompasses all of the classes in your dataset. It answers the question "What kind of things

The Ultimate Guide to Object Detection (November 2020)

Object detection is a computer vision technology that localizes and identifies objects in an image. Due to object detection's versatility in application, object detection has emerged in the last few

Elisha Odemakinde Hosts Roboflow for a Fireside Chat

Recently, Roboflow machine learning engineer Jacob Solawetz sat down with Elisha Odemakinde, an ML researcher and Community Manager at Data Science Nigeria, for a Fireside chat. During the conversation, Jacob

The Train, Validation, Test Split and Why You Need It

At Roboflow, we often get asked, what is the train, validation, test split and why do I need it? The motivation is quite simple: you should separate you data into train, validation, and test splits to prevent your model from overfitting and to accurately evaluate your model. T

How to Train a Custom Resnet34 Model for Image Classification in fastai and PyTorch

Can a computer tell the difference between a dandelion and a daisy? In this post we put these philosophical musings aside, and dive into the the code necessary to find

Fast.ai v2 Released - What's New?

Fastai, the popular deep learning framework and MOOC releases fastai v2 with new improvements to the fastai library, a new online machine learning course, and new helper repositories. fastai's layered

Tackling the Small Object Problem in Object Detection

Detecting small objects is one of the most challenging and important problems in computer vision. In this post, we will discuss some of the strategies we have developed at Roboflow

How to Train a Custom TensorFlow Lite Object Detection Model

In this post, we walk through the steps to train and export a custom TensorFlow Lite object detection model with your own object detection dataset to detect your own custom

PP-YOLO Surpasses YOLOv4 - State of the Art Object Detection Techniques

Baidu publishes PP-YOLO and pushes the state of the art in object detection research by building on top of YOLOv3, the PaddlePaddle deep learning framework, and cutting edge computer vision research.

Ontology Management for Computer Vision

As their projects mature and dataset sizes grow, most teams wrestle with their workflow. Slicing and dicing data is more of an art than a science and you will want

How to Train EfficientNet - Custom Image Classification

In this tutorial, we will train state of the art EfficientNet convolutional neural network, to classify images, using a custom dataset and custom classifications. To run this tutorial on your

What are Anchor Boxes in Object Detection?

Object detection models utilize anchor boxes to make bounding box predictions. In this post, we dive into the concept of anchor boxes and why they are so pivotal for modeling

Breaking Down YOLOv4

A thorough explanation of how YOLOv4 worksThe realtime object detection space remains hot and moves ever forward with the publication of YOLO v4. Relative to inference speed, YOLOv4 outperforms other

Getting Started with Data Augmentation in Computer Vision

Data augmentation in computer vision is not new, but recently data augmentation has emerged on the forefront of state of the art modeling. YOLOv4, a new state of the art

What is Mean Average Precision (mAP) in Object Detection?

What is mean average precision? How do we calculate mAP?

Breaking Down the Technology Behind Self-Driving Cars

In May 2016, Joshua Brown died in the Tesla's first autopilot crash. The crash was attributed to the self-driving cars system not recognizing the difference between a truck and the

YOLOv3 Versus EfficientDet for State-of-the-Art Object Detection

YOLOv3 is known to be an incredibly performant, state-of-the-art model architecture: fast, accurate, and reliable. So how does the "new kid on the block," EfficientDet, compare? Without spoilers, we were