## 2 Related Works
Specialised educational programmes for the blind are implemented in Turkey. \"Istanbul Modern The Colour I Touch\" is a programme for blind and partially sighted children and adolescents. It allows for guided tours of exhibitions, participation in specialist workshops and screenings of films with audio descriptions [14]. The Van Loon House Museum (Amsterdam, The Netherlands) focuses on the kinaesthetic cognition of the exhibits. The museum is open 7 days a week and offers guided tours where one can touch the selected exhibits from the shared collection [15]. The Touch Museum, established in 1984 and located in Kallithea (Greece), in the historic building \"Lighthouse for the Blind of Greece\" has collected many interesting museum artefacts that can be explored kinaesthetically. All the objects in the museum are copies of the originals exhibited in other museums around the country and, importantly, they can be explored/experienced by touch [16]. The City Museum Trier (\"Stadtmuseum Trier\") [17] introduced audio tracks to tactile reproductions and replicas of museum exhibits dedicated to the visually impaired and blind. Article [18] describes the construction of a device intended for visually impaired people. It consists of a ring put on a finger, NFC sensors placed on the surface of the printed 3D model (in FFF technology) and an application for a tablet or smartphone. During kinaesthetic cognition, coupling occurs between the ring and the sensor, which activates the soundtrack through an application running on the smartphone. The authors used scanning and 3D printing to prepare the 3D model. Study [19] is theoretical and cognitive in nature and concerns collecting opinions from blind people visiting museums in order to collect guidelines for creating tactile exhibits. The authors pay special attention to obtaining the appropriate copy surfaces of the exhibits and the materials used to make them. The authors of [20] emphasise the importance of 3D printing technology in museology, which in the future will lead to a paradigm shift in the museum model. In the future, museum objects or their copies will be accessible by touch. Multisensory forms of communing with culture will be important for the accessibility of cultural heritage, especially for people with learning difficulties, children, the elderly, blind or partially sighted people. As for today, it should be said that the standards for the transfer of 3D objects to multi-sensory feeling have not yet been developed. The proposed solutions require refinement, testing and examination. Publication [21] describes an interactive audio guide using a set of cameras identifying the depression of the analysed surface. The device shown was used to analyse the surface of copies of historic reliefs printed with FFF (fused filament fabrication) technology. The interaction between the finger depressions penetrating the relief and the distance read from the camera provides 2.5D spatial information, which results in the transmission of information in the form of audio. The constructed prototype was pre-tested in pilot studies with the participation of visually impaired people. The process of creating 3D models of museum objects using the Structure from Motion (SfM) method is presented in [22]. The authors presented the limitations of the automatic digitisation process (correction of the 3D model mesh, textures, etc.) and the method of verifying the compliance of the resulting digital copy of the exhibit with the original. However, the topic of 3D printing of replicas of museum artefacts was not discussed in the work. In [23], the authors used 3D scanning to generate copies of real digital models for kinaesthetic cognition through 3D printing (FFF technology). The digital models were post-processed to increase the recesses and emphasise the protruding elements. Printed models of sculptures and an architectural object were tested with a blind person. A prototype of an interesting solution is presented in [24].