YOLOv7 PyTorch TXT

Overview

In July 2022, WongKinYiu and AlexeyAB released YOLOv7, an update to the popular lineage of YOLO-based models. It's an improvement in both speed and accuracy over previous YOLO models.

Roboflow supports converting 30+ different object detection annotation formats into the TXT format that YOLOv7 needs and we automatically generate your YAML config file for you. Plus, all 90,000+ datasets available on Roboflow Universe are available in YOLOv7 format for seamless use in custom training.

Check out our breakdown of YOLOv7 or train YOLOv7 on your custom dataset.

Format Description

Below, learn the structure of YOLOv7 PyTorch TXT.

Each image has one txt file with a single line for each bounding box. The format of each row is

class_id center_x center_y width height

where fields are space delimited, and the coordinates are normalized from zero to one.

Note: To convert to normalized xywh from pixel values, divide x (and width) by the image's width and divide y (and height) by the image's height.

1 0.617 0.3594420600858369 0.114 0.17381974248927037
1 0.094 0.38626609442060084 0.156 0.23605150214592274
1 0.295 0.3959227467811159 0.13 0.19527896995708155
1 0.785 0.398068669527897 0.07 0.14377682403433475
1 0.886 0.40879828326180256 0.124 0.18240343347639484
1 0.723 0.398068669527897 0.102 0.1609442060085837
1 0.541 0.35085836909871243 0.094 0.16952789699570817
1 0.428 0.4334763948497854 0.068 0.1072961373390558
1 0.375 0.40236051502145925 0.054 0.1351931330472103
1 0.976 0.3927038626609442 0.044 0.17167381974248927

The `data.yaml` file contains configuration values used by the model to locate images and map class names to class_id's.

train: ../train/images
val: ../valid/images

nc: 3
names: ['head', 'helmet', 'person']