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How to measure the color of tomato paste with a digital colorimeter? 


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To measure the color of tomato paste with a digital colorimeter, a colorimeter can be utilized to accurately quantify color and color uniformity. This tool allows for precise measurement of color parameters by analyzing electronic images. Additionally, a color calibration method for digital camera images can be employed to capture quantitative surface color information of agricultural products, including tomato paste. Moreover, the concept of optothermal window (OW) detection can be utilized to assess the color of tomato paste, providing a good correlation between the OW signal magnitude and color-related parameters like colorimetric index L* and tomato paste index (TPI). By combining these techniques, one can effectively measure the color of tomato paste using a digital colorimeter with accuracy and precision.

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The paper introduces a novel method using optothermal window (OW) detection for assessing color in tomato products, including paste, by indirectly measuring absorbance in opaque samples, offering a new approach.
Not addressed in the paper.
The colorimeter in the paper uses an integrating sphere with quartz glass and extinction paint to measure color accurately, preventing contamination by powder or paste bodies.
The color of tomato paste can be measured using a digital colorimeter by assessing colorimetric variables from digital images in RGB color model, correlating them with physico-chemical attributes.
The Tomato Analyzer-color Test (TACT) tool allows accurate color quantification in tomatoes using digital images, enhancing objectivity and data quality compared to traditional colorimeters.

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