Convert munsell to rgb11/7/2023 ![]() ![]() ![]() Soil colour is a key indicator of soil physical and chemical properties such as mineral composition, organic matter, and moisture content, and it is an important feature used in soil classification. Without any adjustment when the accuracy of individual Munsell soil colour determination is only 9 % for the top 5 predictions, the accuracy of the proposed method is 74 %, which is significant. Thus, the aim of this study is to determine the Munsell soil colour accurately from the MSCB by adjusting the pixel intensity of the smartphone-captured images. To address this issue, we investigated different colour models and finally introduced a colour-intensity relationship between the images captured by Nix Pro and smartphones by exploring different distance functions. We have observed that there are colour reading discrepancies between smartphone and Nix Pro-provided readings. These captured soil colours are then compared with the true colour determined using a commonly used sensor (Nix Pro-2). In this study, we used popular smartphones to capture soil colours from images in the Munsell Soil Colour Book (MSCB) to determine the colour digitally. The process of determining soil colour from the chart is subjective and error-prone. ![]() For this purpose, Munsell soil colour charts are widely used by archaeologists, scientists, and farmers. Soil colour is one of the most important factors in agriculture for monitoring soil health and determining its properties. ![]()
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