Authenticity of Basquiat artworks.
Read our Basquiat artwork and autograph verification report, tap on the blue box:
Four easy steps to get a Basquiat artwork or signature verified or appraised:
Are these signatures and sketch authentic by Basquiat?
Signed drawings
An autographed sketch
The submitted artwork is a commanding visual piece, representing a man engaged in a phone call, with the phone cord noticeably dangling. The figure is depicted using a red oil stick on woven paper, creating an impactful, vivid image. This medium was indeed often chosen by Basquiat for the color intensity and textural quality it provided, aligning with his tactile artistic style.
The challenge
Signature analysis
We are commissioned to authenticate a signed sketched, potentially by Basquiat. For this work, we firstly created a dataset comprised of 100 photos of authentic signatures of Basquiat, verified by an art experts. Secondly, we painted a few fake signatures, to validate the result.
The artwork comes with a Estate of Basquiat Certificate of Authenticity.
GETTING READY
Processing the signatures
We converted the photos of signatures into squared B/W images, to use as input for our neural network, which works with sub-images of 256x256 pixels. 70% of the authentic signatures were separated for training, 10% for validation, and the remaining 20% were reserved for testing. We placed in a different folder the unknown signatures the customer provided us with.
Training our neural network
Our neural networks are trained on the images of authentic signatures
The number of available authentic signatures is finite, so we perform data augmentation: This means randomly translating and rotating the shape of the signature in the squared images. This improves the accuracy of the classification. Additionally, it is also zoomed in and out a bit.
- We trained our model using the authentic samples and skilled forgeries. For this task, we used two networks, an encoder and a decoder, which is able to reconstruct the signatures. After obtaining training convergence, we saved the trained model.
Four easy steps to get a Basquiat artwork or signature verified or appraised:
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If you find difficulties uploading the images, send them directly to [email protected] .
