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Joseph Nelson

Roboflow cofounder and CEO. On a mission to transform every industry by democratizing computer vision. Previously founded and sold a machine learning company.

Latest Posts by Joseph Nelson

Releasing an Improved Blood Count and Cell Detection (BCCD) Dataset

14 Feb 2020 • 1 min read

Releasing an Improved Blood Count and Cell Detection (BCCD) Dataset

Computer vision is revolutionizing medical diagnoses by assisting doctors with patterns they may not have seen or identifying an error they may have overlooked. Thus, it's unsurprising one of the more popular "hello world" datasets of object detection is the blood count and cell detection dataset

boilerplate

12 Feb 2020 • 4 min read

Eliminating Boilerplate Code with Roboflow to Monitor Security Camera Footage

By using Roboflow, data scientist Alaa Senjab reduced his time to train a custom object detection model detecting guns in security camera footage while increasing machine learning model accuracy. Highlights: * Validating image annotation quality, and automated correction of error-inducing improper labels * Preprocessing and augmentation techniques improving model generalizability * Automated generation

Training a TensorFlow MobileNet Object Detection Model with a Custom Dataset

9 Feb 2020 • 7 min read

Training a TensorFlow MobileNet Object Detection Model with a Custom Dataset

Change two lines of code and have a custom trained object detection model leveraging the TensorFlow 1.5 API.

When to Use Grayscale as a Preprocessing Step

5 Feb 2020 • 2 min read

When to Use Grayscale as a Preprocessing Step

Grayscale allows our models to be more computationally efficient. So when **shouldn't** we grayscale our images?

You Might Be Resizing Your Images Incorrectly

31 Jan 2020 • 4 min read

You Might Be Resizing Your Images Incorrectly

Resizing images is a critical preprocessing step in computer vision. Principally, our machine learning models [https://models.roboflow.ai] train faster on smaller images. An input image that is twice as large requires our network to learn from four times as many pixels — and that time adds up. Moreover, many

How to Convert Annotations from PASCAL VOC XML to COCO JSON

29 Jan 2020 • 9 min read

How to Convert Annotations from PASCAL VOC XML to COCO JSON

Convert from VOC XML to COCO JSON (or any format!) in four clicks.

public

27 Jan 2020 • 2 min read

Introducing Public Datasets

One of the most painstaking components of getting started with computer vision is getting access to clean, labeled data. For example, when the Roboflow team built BoardBoss, we painstakingly collected hundreds of Boggle board images from various devices (iPhone 7, iPhone X, iPhone 11…) and then labeled each individual letter

What is Image Preprocessing and Augmentation?

26 Jan 2020 • 8 min read

What is Image Preprocessing and Augmentation?

Understanding image preprocessing and augmentation options is essential to making the most of your training data.

Training a YOLOv3 Object Detection Model with a Custom Dataset

9 Jan 2020 • 11 min read

Training a YOLOv3 Object Detection Model with a Custom Dataset

A walkthrough of building chess piece object detection model, easily adapted to your own dataset.

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