Introduction #
The Google Recaptcha V2 Image dataset is tailored for object detection and classification assignments. Comprising 11,730 images with 2,584 labeled objects falling into three distinct classes — stair, crosswalk, and chimney — this dataset features a range of 12 categories, including car, other, crosswalk, bus, hydrant, palm, traffic_light, bicycle, bridge, stair, chimney, and motorcycle. Forming a segment of Recaptcha V2 Solve, this dataset offers a diverse array of images designed to facilitate tasks in object detection and classification.
Motivation
Recaptcha V2 Solver is a Google Recaptcha V2 automated solution service. Many examples of Recaptcha V2 can be too difficult for a human to solve a captcha problem, it takes from time to time to complete it until the site makes sure that it is a real person. Authors’ service will shift the responsibility for passing the captcha to artificial intelligence, while you drink coffee and use something more important.
During the study of repeated solutions, many tools were found that solve Recaptcha V2 by sound (one of them). Much to my surprise, during the operation, authors did not find a single implementation that would solve Recaptcha V2 from pictures. Authors were presented with an interesting solution for the implementation of Recaptcha, about getting images.
Please note that the annotations are of poor quality
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Homepage
GitHubSummary #
Google Recaptcha V2 Image is a dataset for object detection and classification tasks. Possible applications of the dataset could be in the security industry.
The dataset consists of 11730 images with 2584 labeled objects belonging to 3 different classes including stair, crosswalk, and chimney.
Images in the Google Recaptcha Image dataset have bounding box annotations. There are 11215 (96% of the total) unlabeled images (i.e. without annotations). There are no pre-defined train/val/test splits in the dataset. Alternatively, the dataset could be split into 12 category: car (3558 images), other (1340 images), crosswalk (1240 images), bus (1209 images), hydrant (952 images), palm (911 images), traffic_light (791 images), bicycle (780 images), bridge (533 images), stair (211 images), chimney (124 images), and motorcycle (81 images). The dataset was released in 2022.
Explore #
Google Recaptcha Image dataset has 11730 images. Click on one of the examples below or open "Explore" tool anytime you need to view dataset images with annotations. This tool has extended visualization capabilities like zoom, translation, objects table, custom filters and more. Hover the mouse over the images to hide or show annotations.
Class balance #
There are 3 annotation classes in the dataset. Find the general statistics and balances for every class in the table below. Click any row to preview images that have labels of the selected class. Sort by column to find the most rare or prevalent classes.
Class ㅤ | Images ㅤ | Objects ㅤ | Count on image average | Area on image average |
|---|---|---|---|---|
stair➔ rectangle | 212 | 1513 | 7.14 | 19.17% |
crosswalk➔ rectangle | 180 | 889 | 4.94 | 19.77% |
chimney➔ rectangle | 124 | 182 | 1.47 | 11.49% |
Co-occurrence matrix #
Co-occurrence matrix is an extremely valuable tool that shows you the images for every pair of classes: how many images have objects of both classes at the same time. If you click any cell, you will see those images. We added the tooltip with an explanation for every cell for your convenience, just hover the mouse over a cell to preview the description.
Images #
Explore every single image in the dataset with respect to the number of annotations of each class it has. Click a row to preview selected image. Sort by any column to find anomalies and edge cases. Use horizontal scroll if the table has many columns for a large number of classes in the dataset.
Object distribution #
Interactive heatmap chart for every class with object distribution shows how many images are in the dataset with a certain number of objects of a specific class. Users can click cell and see the list of all corresponding images.
Class sizes #
The table below gives various size properties of objects for every class. Click a row to see the image with annotations of the selected class. Sort columns to find classes with the smallest or largest objects or understand the size differences between classes.
Class | Object count | Avg area | Max area | Min area | Min height | Min height | Max height | Max height | Avg height | Avg height | Min width | Min width | Max width | Max width |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
stair rectangle | 1513 | 4.15% | 52.5% | 0.08% | 3px | 2.5% | 120px | 100% | 20px | 16.48% | 3px | 2.5% | 119px | 99.17% |
crosswalk rectangle | 889 | 5.14% | 64.19% | 0.01% | 1px | 0.83% | 99px | 82.5% | 21px | 17.25% | 1px | 0.83% | 120px | 100% |
chimney rectangle | 182 | 7.84% | 57.48% | 0.17% | 6px | 5% | 120px | 100% | 45px | 37.29% | 3px | 2.5% | 93px | 77.5% |
Spatial Heatmap #
The heatmaps below give the spatial distributions of all objects for every class. These visualizations provide insights into the most probable and rare object locations on the image. It helps analyze objects' placements in a dataset.
Objects #
Table contains all 2584 objects. Click a row to preview an image with annotations, and use search or pagination to navigate. Sort columns to find outliers in the dataset.
Object ID ㅤ | Class ㅤ | Image name click row to open | Image size height x width | Height ㅤ | Height ㅤ | Width ㅤ | Width ㅤ | Area ㅤ |
|---|---|---|---|---|---|---|---|---|
1➔ | stair rectangle | Stair (424).png | 120 x 120 | 33px | 27.5% | 32px | 26.67% | 7.33% |
2➔ | stair rectangle | Stair (424).png | 120 x 120 | 24px | 20% | 53px | 44.17% | 8.83% |
3➔ | stair rectangle | Stair (424).png | 120 x 120 | 24px | 20% | 54px | 45% | 9% |
4➔ | crosswalk rectangle | Cross (157).png | 120 x 120 | 19px | 15.83% | 41px | 34.17% | 5.41% |
5➔ | crosswalk rectangle | Cross (157).png | 120 x 120 | 10px | 8.33% | 77px | 64.17% | 5.35% |
6➔ | crosswalk rectangle | Cross (157).png | 120 x 120 | 7px | 5.83% | 42px | 35% | 2.04% |
7➔ | crosswalk rectangle | Cross (157).png | 120 x 120 | 7px | 5.83% | 33px | 27.5% | 1.6% |
8➔ | crosswalk rectangle | Cross (157).png | 120 x 120 | 8px | 6.67% | 25px | 20.83% | 1.39% |
9➔ | crosswalk rectangle | Cross (157).png | 120 x 120 | 6px | 5% | 19px | 15.83% | 0.79% |
10➔ | crosswalk rectangle | Cross (157).png | 120 x 120 | 6px | 5% | 12px | 10% | 0.5% |
License #
Citation #
If you make use of the Google Recaptcha Image data, please cite the following reference:
@dataset{Google Recaptcha Image,
author={Mike Mazurov},
title={Google Recaptcha V2 Image},
year={2022},
url={https://www.kaggle.com/datasets/mikhailma/test-dataset}
}
If you are happy with Dataset Ninja and use provided visualizations and tools in your work, please cite us:
@misc{ visualization-tools-for-google-recaptcha-image-dataset,
title = { Visualization Tools for Google Recaptcha Image Dataset },
type = { Computer Vision Tools },
author = { Dataset Ninja },
howpublished = { \url{ https://datasetninja.com/google-recaptcha-image } },
url = { https://datasetninja.com/google-recaptcha-image },
journal = { Dataset Ninja },
publisher = { Dataset Ninja },
year = { 2024 },
month = { nov },
note = { visited on 2024-11-21 },
}Download #
Dataset Google Recaptcha Image can be downloaded in Supervisely format:
As an alternative, it can be downloaded with dataset-tools package:
pip install --upgrade dataset-tools
… using following python code:
import dataset_tools as dtools
dtools.download(dataset='Google Recaptcha Image', dst_dir='~/dataset-ninja/')
Make sure not to overlook the python code example available on the Supervisely Developer Portal. It will give you a clear idea of how to effortlessly work with the downloaded dataset.
The data in original format can be downloaded here.
Disclaimer #
Our gal from the legal dep told us we need to post this:
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