This paper presents a roughness analysis of sea surface from visible images by feature measurements of texture for the first time. The algorithms presented in this paper include six texture feature measurements of sea surface use gray level co-occurrence matrix, gray level-gradient co-occurrence matrix, Tamura texture feature, autocorrelation function, edge frequency and fractional Brownian motion autocorrelation. The empirical relationship between wind speeds (or sea surface roughness) and image texture roughness are estimated based on the extracted data. Our experiments have demonstrated that our texture methods and empirical relation between wind speeds and image texture roughness can potentially be used to analyze sea surface roughness from visible images. INDEX TERMS Sea surface roughness, gray level co-occurrence matrices, gray level-gradient co-occurrence matrices, tamura texture features, autocorrelation function, edge frequency, fractional Brownian motion. HUICHENG ZHOU received the M.S. degree in information and communication engineering from the School of Electronic and Optical Engineering,

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