Methods and systems for signature verification

A method of signature verification, the method comprising:

• receiving a signature-in-question;
• extracting at least one of an image of the signature-in-question and a trajectory of the signature-in-question from the received signature-in-question;
• accessing a reference signature from a reference signature storage, the reference signature storage including at least one of a reference image and a reference trajectory;
• extracting at least one of the reference image and the reference trajectory from the accessed reference signature storage;
• and
• comparing the at least one of the image of the signature-in-question and trajectory of the signature-in-question to the at least one of the reference image and reference trajectory;
• wherein:
• the trajectory of the signature-in-question is received with the signature-in-question;
• the trajectory of the signature-in-question is converted to the image of the signature-in-question;
• and
• the image of the signature-in-question and the reference image are compared to determine whether the signature-in-question is authentic.

A method of signature verification, the method comprising:

• receiving a signature-in-question;
• extracting at least one of an image of the signature-in-question and a trajectory of the signature-in-question from the received signature-in-question;
• accessing a reference signature from a reference signature storage, the reference signature storage including at least one of a reference image and a reference trajectory;
• extracting at least one of the reference image and the reference trajectory from the accessed reference signature storage;
• and
• comparing the at least one of the image of the signature-in-question and trajectory of the signature-in-question to the at least one of the reference image and reference trajectory;
• wherein:
• the image of the signature-in-question is received with the signature-in-question;
• the image of the signature-in-question is converted to the trajectory of the signature-in-question;
• and
• the trajectory of the signature-in-question and the reference trajectory are compared to determine whether the signature-in-question is authentic.

A method of signature verification, the method comprising:

• receiving a signature-in-question;
• extracting at least one of an image of the signature-in-question and a trajectory of the signature-in-question from the received signature-in-question;
• accessing a reference signature from a reference signature storage, the reference signature storage including at least one of a reference image and a reference trajectory;
• extracting at least one of the reference image and the reference trajectory from the accessed reference signature storage;
• and
• comparing the at least one of the image of the signature-in-question and trajectory of the signature-in-question to the at least one of the reference image and reference trajectory;
• wherein the image of the signature-in-question is received with the signature-in-question;
• and wherein comparing the image of the signature-in-question and the reference trajectory comprises:
• inputting the image of the signature-in-question in a first neural network and generating a first output;
• inputting the reference trajectory in a second neural network and generating a second output;
• and
• inputting the first output and the second output in a third neural network and generating at least one score.

A method of signature verification, the method comprising:

• receiving a signature-in-question;
• extracting at least one of an image of the signature-in-question and a trajectory of the signature-in-question from the received signature-in-question;
• accessing a reference signature from a reference signature storage, the reference signature storage including at least one of a reference image and a reference trajectory;
• extracting at least one of the reference image and the reference trajectory from the accessed reference signature storage;
• and
• comparing the at least one of the image of the signature-in-question and trajectory of the signature-in-question to the at least one of the reference image and reference trajectory;
• wherein:
• the reference image is extracted from an identity document image;
• the trajectory of the signature-in-question is received with the signature-in-question;
• and
• the trajectory of the signature-in-question and the reference image are compared to determine whether the signature-in-question is authentic;
• and
• wherein comparing the trajectory of the signature-in-question and the reference image comprises:
• inputting the trajectory of the signature-in-question in a first neural network and generating a first output;
• inputting the reference image in a second neural network and generating a second output;
• inputting the trajectory of the signature-in-question in a third neural network and generating a third output;
• concatenating the first output, the second output and the third output;
• inputting the concatenated first, second and third output into a classification neural network;
• and
• generating at least one score.

A method of signature verification, the method comprising:

• receiving a signature-in-question;
• extracting at least one of an image of the signature-in-question and a trajectory of the signature-in-question from the received signature-in-question;
• accessing a reference signature from a reference signature storage, the reference signature storage including at least one of a reference image and a reference trajectory;
• extracting at least one of the reference image and the reference trajectory from the accessed reference signature storage;
• and
• comparing the at least one of the image of the signature-in-question and trajectory of the signature-in-question to the at least one of the reference image and reference trajectory;
• wherein:
• the reference image is extracted from an identity document image;
• the trajectory of the signature-in-question is received with the signature-in-question;
• and
• the trajectory of the signature-in-question and the reference image are compared to determine whether the signature-in-question is authentic;
• and
• wherein comparing the trajectory of the signature-in-question and the reference image comprises:
• inputting the trajectory of the signature-in-question in a first neural network and generating a first output;
• inputting the reference image in a second neural network and generating a second output;
• and
• inputting the first output and the second output in a third neural network and generating at least one score.

A signature verification system comprising:

• a data receiver;
• an updatable data repository functionally coupled to the data receiver;
• a display device functionally coupled to the data receiver;
• a processor operatively coupled to the data receiver, to the updatable data repository and to the display device;
• and
• a memory coupled to the processor, the memory storing instructions that, when executed by the processor, perform a set of operations comprising:
• receiving, at the data receiver, a signature-in-question;
• extracting, via the processor, at least one of an image of the signature-in-question and a trajectory of the signature-in-question from the received signature-in-question;
• accessing a reference signature storage of a reference signature, the reference signature storage including at least one of a reference image and a reference trajectory;
• extracting, via the processor, at least one of the reference image and the reference trajectory from the accessed reference signature storage;
• and
• comparing, via the processor, the at least one of the image of the signature-in-question and trajectory of the signature-in-question to the at least one of the reference image and reference trajectory to determine whether the signature-in-question is authentic;
• wherein the image of the signature-in-question is received with the signature-in-question;
• and
• wherein the set of operations comprises comparing the image of the signature-in-question to the reference trajectory by:
• inputting the image of the signature-in-question in a first neural network and generating a first output;
• converting the reference trajectory to a reference image and inputting the reference image in a second neural network to generate a second output;
• inputting the reference trajectory in a third neural network and generating a third output;
• concatenating the first output, the second output and the third output;
• inputting the concatenated first, second and third outputs into a classification neural network;
• and
• generating at least one score.

A signature verification system comprising:

• a data receiver;
• an updatable data repository functionally coupled to the data receiver;
• a display device functionally coupled to the data receiver;
• a processor operatively coupled to the data receiver, to the updatable data repository and to the display device;
• and
• a memory coupled to the processor, the memory storing instructions that, when executed by the processor, perform a set of operations comprising:
• receiving, at the data receiver, a signature-in-question;
• extracting, via the processor, at least one of an image of the signature-in-question and a trajectory of the signature-in-question from the received signature-in-question;
• accessing a reference signature storage of a reference signature, the reference signature storage including at least one of a reference image and a reference trajectory;
• extracting, via the processor, at least one of the reference image and the reference trajectory from the accessed reference signature storage;
• and
• comparing, via the processor, the at least one of the image of the signature-in-question and trajectory of the signature-in-question to the at least one of the reference image and reference trajectory;
• wherein:
• the image of the signature-in-question is received with the signature-in-question;
• the extracted reference trajectory is converted to the reference image;
• and
• the set of operations comprises comparing the image of the signature-in-question and the reference image to determine whether the signature-in-question is authentic.

A signature verification system comprising:

• a data receiver;
• an updatable data repository functionally coupled to the data receiver;
• a display device functionally coupled to the data receiver;
• a processor operatively coupled to the data receiver, to the updatable data repository and to the display device;
• and
• a memory coupled to the processor, the memory storing instructions that, when executed by the processor, perform a set of operations comprising:
• receiving, at the data receiver, a signature-in-question;
• extracting, via the processor, at least one of an image of the signature-in-question and a trajectory of the signature-in-question from the received signature-in-question;
• accessing a reference signature storage of a reference signature, the reference signature storage including at least one of a reference image and a reference trajectory;
• extracting, via the processor, at least one of the reference image and the reference trajectory from the accessed reference signature storage;
• and
• comparing, via the processor, the at least one of the image of the signature-in-question and trajectory of the signature-in-question to the at least one of the reference image and reference trajectory;
• wherein:
• the trajectory of the signature-in-question is received with the signature-in-question;
• the trajectory of the signature-in-question is converted to the image of the signature-in-question;
• and
• the set of operations comprises comparing the image of the signature-in-question and the reference image to determine whether the signature-in-question is authentic.