Comparison of the discrete transform cosine and the discrete wavelet transform for image of compression of fingerprint / Comparação da transformada wavelet discreta e da transformada do cosseno, para compressão de imagens de impressão digital

AUTOR(ES)

Nilvana dos Santos Reigota

DATA DE PUBLICAÇÃO

2007

RESUMO

This research aims to compare the following fingerprint image compression methods: the discrete cosseno transform (DCT), Haar wavelet transform, Daubechies wavelets transform and wavelet scalar quantization (WSQ). The main interest is to find out the technique with the smallest distortion and higher compression ratio. Image quality is measured using peak signal-to-noise ratio (PSNR), signal-to-noise ratio (SNR) and root mean square (ERMS). Image quality using these metrics showed best results for the DCT followed by WSQ, although the WSQ had the best compression time and presented the best quality when evaluated by the GrFinger 4.2 software.

ASSUNTO(S)

snrms wavelet of haar impressão digital psnr rmse rmse wavelet de haar image quality image compression psnr snrms dct dct fingerprint qualidade da imagem compressão de imagens

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