In the field of cultural heritage conservation, mural material identification is a critically important task. Hyperspectral imaging technology has become an essential tool for heritage science professionals in recent years due to its non-contact and high-precision characteristics. Among the numerous hyperspectral camera brands, CHNSpec's products demonstrate unique advantages in mural material identification with their stable performance and broad applicability.
I. Hyperspectral Imaging: The "Penetrating Eye" for Mural Authentication
Hyperspectral imaging technology captures reflection or transmission information of objects across hundreds of continuous bands from ultraviolet to infrared, forming a "spectral-spatial unified" data cube. This technology not only reveals the surface morphology of murals but can also penetrate pigment layers to uncover hidden brushstrokes, restoration traces, and even underlying structures.
For murals, the advantages of hyperspectral imaging are particularly significant:
Multi-dimensional Analysis: Combining spectral characteristics with spatial distribution to accurately identify material components such as mineral pigments and binders;
Non-destructive Testing: Avoiding physical damage to fragile murals and ensuring the safety of cultural relics;
High Efficiency: Acquiring complete data from large areas in a single scan, significantly improving detection efficiency.
II. CHNSpec: A Leading Innovator in Hyperspectral Technology
CHNSpec, led by a doctoral team in optics from Zhejiang University, is a highly influential enterprise in the domestic hyperspectral camera field with multiple independent intellectual properties. Its R&D team, with profound optical expertise and practical experience, continuously drives product innovation and upgrades. The company has received numerous industry accolades, with technical strength recognized by authoritative awards. Its products are ISO9001:2015 certified, with key indicators such as signal-to-noise ratio and single-pixel chromatic repeatability reaching international standards.
III. CHNSpec Hyperspectral Cameras: Tailored for Mural Authentication
CHNSpec's FigSpec® series hyperspectral cameras are deeply optimized for cultural relic conservation needs. Taking its representative FS1X series as an example, this series covers a spectral range of 400–1700 nm, including visible light, near-infrared, and short-wave infrared configurations, allowing flexible selection based on specific detection requirements. Its core technical features include:
High-Resolution Spectral Capture: Wavelength resolution better than 2.5 nm in the visible light band and up to 6 nm in the short-wave infrared band, enabling the detection of molecular-level spectral differences in pigments. For example, when detecting cinnabar and minium in murals, high-resolution spectroscopy can clearly distinguish their absorption characteristics in the near-infrared region.
Rapid Imaging Capability: Full-spectrum capture speed of up to 128 FPS, with support for multi-region band selection increasing the speed to 3300 Hz, suitable for rapid scanning of large murals. This feature is particularly useful at archaeological sites or temporary museum exhibitions, enabling data acquisition within limited timeframes.
Intelligent Operation: Built-in scanning mechanisms and autofocus systems allow panoramic hyperspectral acquisition without significant device movement, lowering the operational threshold. Even non-professional operators can quickly learn to use the device, ensuring smooth detection workflows.
IV. Application Examples: CHNSpec Empowers Mural Conservation
In practical applications, CHNSpec hyperspectral cameras have played key roles in multiple mural conservation projects. During the conservation of the Shanxi Yungang Grottoes, CHNSpec's FS-IQ-VISNIR (visible-near infrared hyperspectral product) and FS-IQ-SWIR (short-wave infrared hyperspectral product) were used, leveraging their high-precision, non-destructive characteristics to meet the fragile nature and color documentation needs of the grotto statues.
The FS-IQ-VISNIR covers the 400–1000 nm visible to near-infrared range, precisely corresponding to the characteristic spectral intervals of mineral pigments used in the grotto statues. It accurately captures subtle color differences indistinguishable to the naked eye, providing data support for studying the color evolution of statues. The FS-IQ-SWIR, covering the 900–1700 nm short-wave infrared range, can penetrate slight dust and later restoration coatings on the statue surfaces to capture underlying original color information. For statues where surface colors were damaged due to destruction, it restored the original color tones, providing core spectral basis for the digital restoration of major caves.
Additionally, in the material identification of Dunhuang murals, CHNSpec hyperspectral cameras provided critical data for developing scientific restoration plans through precise analysis of pigment composition and aging status, effectively advancing mural conservation efforts.
V. CHNSpec Product Matrix: Meeting Diverse Needs
Beyond the above models, CHNSpec offers a rich product line to meet various mural material identification needs:
FS-27 Short-Wave Infrared Hyperspectral Camera (900–1700 nm): Integrates a transmission grating spectroscopic module, supports direct integration with microscopes, and is suitable for micro-zone composition analysis, such as microscopic structure detection of mural pigment particles.
FS13 Visible/Near-Infrared Model (400–1000 nm): Boasts a spectral resolution of 2.5 nm, enabling rapid acquisition of high-resolution images. It is suitable for non-destructive testing of conventional cultural relics like paintings and ceramics, while also excelling in mural authentication.
Portable FS-IQ Series: Supports rapid field deployment, with a built-in battery allowing up to 4 hours of continuous operation, ideal for archaeological sites or mobile detection scenarios. For mural sites in remote areas, this series enables convenient and efficient data acquisition.
In summary, CHNSpec's FigSpec® series provides reliable solutions for mural material identification with its stable performance, flexible configurations, diverse product line, successful application cases, and professional technical support. If you are seeking a hyperspectral camera suitable for mural material identification, CHNSpec is undoubtedly a trustworthy choice.