LSA16: A Handshape Dataset for the Argentinian Sign Language

This database contains images of 16 hand configurations of the Argentinian Sign Language (LSA), each performed 5 times by 10 different subjects, for a total of 800 images. The subjects wore color hand gloves and black clothes.

Handshapes

The following table lists the id and name of each handshape, along with a sample.

ID	Name	Sample	ID	Name	Sample	ID	Name	Sample	ID	Name	Sample
01	Five		02	Four		03	Horns		04	Curve
05	Fingers together		06	Double		07	Hook		08	Index
09	L		10	Flat Hand		11	Mitten		12	Beak
13	Thumb		14	Fist		15	Telephone		16	V

Shooting

The dataset was recorded in an indoors environment, with artificial lightning.

Subjects wore dark clothes and performed the handshapes standing, with a white wall as a background. To simplify the problem of hand segmentation within an image, subjects wore fluorescent-colored gloves. These substantially simplify the problem of recognizing the position of the hand and performing its segmentation, and remove all issues associated to skin color variations, while fully retaining the difficulty of recognizing the handshape. The subjects performed the same handshape with both hands.

Each handshape was executed imposing few constraints on the subjects to increase diversity and realism in the database. All subjects were non-signers and right-handed, were taught how to perform the handshape during the shooting session by showing them an image of the handshape as performed by one of the authors, and practiced each handshape a few times before recording.

We employed a generic webcam for the recording, with a resolution of 640 by 480.

Raw version

The raw version of the dataset contains one image for each handshape instance in the dataset. Each image is on average 0.25mb.

The filename of each image specifies its class, subject, and repetition, in the format CLASS_SUBJECT_REPETITION.png. For example, the image 3_2_4.png corresponds to the 4th repetition of handshape 3 (Horns), as performed by subject 2.

Download Raw Version (180mb)

Pre-preprocessed version

We provide a pre-processed version of the dataset to reduce the overhead of performing experiments with the data. From each image we extracted only the right hand and segmented it, replacing the background with black pixels. The filename format is the same as in the raw version. We provide only the segmented hand images. The details of how the images were segmented are described in Handshape recognition for Argentinian Sign Language using ProbSom

Download Preprocessed Version (8mb)

Samples

Sample images of the dataset.

License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. The dataset is made available strictly for academic purposes. No derivative works or commercial use are allowed. Please contact the authors if you are unsure about what constitutes fair use under this license, or need to use the dataset under a different license.