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Analysis of the Black and White Image Recording of the Converted RGB Photographic Image

izvorni znanstveni rad

izvorni znanstveni rad

Analysis of the Black and White Image Recording of the Converted RGB Photographic Image

Vrsta prilog u časopisu
Tip izvorni znanstveni rad
Godina 2025
Časopis Tehnički glasnik
Volumen 20
Svesčić 1
Stranice str. 1-6
DOI 10.31803/tg-20240717132537
ISSN 1846-6168
EISSN 1848-5588
Status objavljeno

Sažetak

A digital camera is generally used for digital recording of photographic images in the RGB system. When such a multicoloured photographic image is converted to black and white using the standard Grayscale conversion in Adobe Photoshop, the colour information, expressed as R, G and B channel values, is lost. This paper analyses the darkening caused by different conversions of the RGB record of a photographic image to a black and white image record. The conversions were performed on three photos, with 10 random colours separated for each photo before conversion. After conversion, the L parameter, which indicates the brightness value, was analysed. The changes in the L parameter due to different methods of photo conversion from multicolour to black and white, such as desaturation, extraction of the R channel, extraction of the G channel and extraction of the B channel, were also analysed.

Ključne riječi

black and white image; Grayscale system; L parameter; photo conversion; RGB system