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1 Research work on the identification of signatures in paintings

There are 2 paintings by Andy Warhol from famous galleries where the signatures are not visible or not visible at all. The places where the signatures are located are marked with red squares.


- in the blue square - clearly visible signature of Mick Jagger

Оптическая бинокулярная система (микроскоп)

 

in the image below - a sample of the authentic signature of Andy Warhol

Оптическая бинокулярная система (микроскоп)

 

in the image below - a sample of the authentic signature of Mick Jagger

Оптическая бинокулярная система (микроскоп)

 

in the image below - the picture "Mick Jagger 143", which clearly shows the signatures of Andy Warhol and Mick Jagger
- signed by Mick Jagger to the left and Andy Warhol to the right, edition of 250, 1975, size 43 × 29 inches

Оптическая бинокулярная система (микроскоп)

 

Next is a work of Andy Warhol, where the signature of Mick Jagger in a blue square is clearly visible, and in the right corner by the red square is marked location Andy Warhol's  signature, which is poorly visible

Оптическая бинокулярная система (микроскоп)

in the above image - the picture "Mick Jagger 143", edition of 250, 1975, size 43 × 29 inches, gallery Guy Hepner Gallery, New York, USA
source by link: https://guyhepner.com/product/mick-jagger-143-andy-warhol/

 

in the image below - shows the lower right corner of the "Mick Jagger 143", on which Andy Warhol's signature is poorly visible, only outlines are visible

Оптическая бинокулярная система (микроскоп)

 

To improve the visibility of the author's signature, light filters with the following parameters were applied to this image:

Оптическая бинокулярная система (микроскоп)

 

The result obtained after the application of light filters

in the image below - the lower right corner of the "Mick Jagger 143"
- Andy Warhol's signature became more visible

Оптическая бинокулярная система (микроскоп)

 

in the image below - the lower right corner of the "Mick Jagger 143", 1975
- in a red square - the location of Andy Warhol's signature
- in a green rectangle - a sample of the visible genuine signature of Andy Warhol

Оптическая бинокулярная система (микроскоп)

 

When comparing the signature image, we see the coincidence of the main details

 

\Next is Andy Warhol's work "Mick Jagger Test", Chase Contemporary Gallery, New York
- in the right upper corner - a technical description of the picture in pencil
- in the right bottom corner — signature of Andy Warhol, which is poorly visible (marked by with a red square )
- in the lower left corner by the red square is marked an area where the signatures become visible after using light filters

Оптическая бинокулярная система (микроскоп)

*sourse by the link: https://ivnewyork.com/products/mick-jagger-test

 

in the image below - the lower right corner of the "Mick Jagger Test",
- in the red square, Andy Warhol's signature is not clearly visible

Оптическая бинокулярная система (микроскоп)

 

To improve the visibility of the author's signature, light filters with the following parameters were applied to this image:

Оптическая бинокулярная система (микроскоп)

 

The result obtained after the application of light filters

in the image below - Andy Warhol's signature is clearly visible

Оптическая бинокулярная система (микроскоп)

 

in the image below - the lower left corner of the "Mick Jagger Test",
- as you can see there are no signatures on the image, even slightly visible

Оптическая бинокулярная система (микроскоп)

 

The next stage shows that after the use of light filters there are barely discernible signatures that were not previously visible.
A special light filters with the following parameters were applied to this image:

Оптическая бинокулярная система (микроскоп)

 

in the image below - the result obtained after the application of light filters by the red squares marked the places where the outlines of the signatures became visible

Оптическая бинокулярная система (микроскоп)

 

Further on this image in green squares were added samples of the original authentic signatures of Andy Warhol and Mick Jagger, and by the red dots marked the places on which it is necessary to pay attention

in the image below -
- in red squares - the location of the identified signatures of Andy Warhol and Mick Jagger
- in a green rectangle - samples of the authentic signature of Andy Warhol and Mick Jagger from the Internet
- red dots mark places for which it is necessary to pay attention

Оптическая бинокулярная система (микроскоп)

 

When comparing, you can see that the main details of the identified signatures coincide with the samples of authentic signatures of Andy Warhol and Mick Jagger from the Internet.

For additional verification of compliance of original signatures and identified signatures, the following was accomplished:

- with the help of a computer program, a sample of Andy Warhol's authentic signature is made translucent and combined with the location of the discovered signature of Andy Warhol
- as a result of which a complete coincidence was revealed
- with the help of a computer program, the sample of the authentic signature of Mick Jagger is made translucent and combined with the location of the discovered signature of Mick Jagger
- as a result of which a complete coincidence was revealed

Оптическая бинокулярная система (микроскоп)

 

Conclusion:

As a result, on the original work "Mick Jagger Test" was found 2 signatures: the signature of Andy Warhol, and Mick Jagger. According to official information from the Chase Contemporary Gallery, in this picture is the signature of Andy Warhol in the lower right corner and a technical inscription on top.

The fact that often on well-known recognized works the signatures are poorly visible, or are not visible to the naked eye, explains that the inscriptions printed with a pencil or other tools become less visible or not visible to the naked eye with time (several dozen years).

This also applies to signatures printed on a sketch, and then painted or partially erased by the author in the process of working on the picture.

Thus, in any other works of art, by using special programs and filters, it becomes possible to identify the signatures and seals and show them in the report.