Visualization Method Based on Digital Image Analysis Reveals Photodamage of the Skin

Blum, Andreas; Vollert, B.; Schlagenhauff, Bettina

doi:10.1001/archderm.140.9.1173

Cited by 2 publications

(4 citation statements)

References 4 publications

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“…The middle UV wavelength (UVB) can penetrate the outer layer of the skin (epidermis) and can causes skin burns, erythema etc. 19 The shortest UV wavelength (UVC) has the maximum risk. However, natural UVC rarely reaches the earth.…”

Section: Human Safety Measuresmentioning

confidence: 99%

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Can we match ultraviolet face images against their visible counterparts?

2015

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In law enforcement and security applications, the acquisition of face images is critical in producing key trace evidence for the successful identification of potential threats. However, face recognition (FR) for face images captured using different camera sensors, and under variable illumination conditions, and expressions is very challenging. In this paper, we investigate the advantages and limitations of the heterogeneous problem of matching ultra violet (from 100 nm to 400 nm in wavelength) or UV, face images against their visible (VIS) counterparts, when all face images are captured under controlled conditions.The contributions of our work are three-fold; (i) We used a camera sensor designed with the capability to acquire UV images at short-ranges, and generated a dual-band (VIS and UV) database that is composed of multiple, full frontal, face images of 50 subjects. Two sessions were collected that span over the period of 2 months. (ii) For each dataset, we determined which set of face image pre-processing algorithms are more suitable for face matching, and, finally, (iii) we determined which FR algorithm better matches cross-band face images, resulting in high rank-1 identification rates. Experimental results show that our cross spectral matching (the heterogeneous problem, where gallery and probe sets consist of face images acquired in different spectral bands) algorithms achieve sufficient identification performance. However, we also conclude that the problem under study, is very challenging, and it requires further investigation to address real-world law enforcement or military applications. To the best of our knowledge, this is first time in the open literature the problem of cross-spectral matching of UV against VIS band face images is being investigated.

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Section: Human Safety Measuresmentioning

confidence: 99%

“…Skin Type II (fair skin), are those who burn easily and tan with difficulty, and Type III (darker white skin) who burn and tan moderately. 16,19,24 Skin Type IV (brown skin), are those who burn minimally, Type V (dark brown skin) are those who burn rarely and Type VI (black skin type) who are almost never burn but tan readily. In Fig.…”

Section: Databasesmentioning

confidence: 99%

Can we match ultraviolet face images against their visible counterparts?

2015

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“…Skin structures are often thin and transparent; deeper structures can be slightly visible by using a sufficiently bright light source. Based on the FAD as a specially developed local contrast enhancement image processing algorithm, these structures can be better visualized after few seconds [6]. The FAD-image was generated by using background noise-reducing algorithms and low-pass image processing filters.…”

Section: Methods Of Features Amplifying Dermoscopy (Fad)mentioning

confidence: 99%

“…In the field of melanocytic tumors, severe dysplastic melanocytic nevi, very early melanomas and featureless, amelanotic or hypomelanotic melanomas can be difficult to diagnose dermoscopically. With the knowledge of a former observation and its visualization of photodamage of the skin, we tested this method on dermoscopic images of difficult melanocytic skin tumors [6]. The aim was to better visualize barely visible but for the correct diagnosis important dermoscopic features.…”

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confidence: 99%