Can Adobe Photoshop be Used to Quantify Sandstone Porosity?
MORSE, MELISSA J. and JAMES R. BOLES, Department of Geological Sciences, University of California, Santa Barbara, 93106-9630 The Photoshop petrographic image analysis method (PPIA) is used for rapid estimation of sandstone porosity from digitized images of blue epoxy impregnated petrographic thin sections. Porosity is measured by cutting blue pixels from the image using Adobe Photoshop and pasting them into a new image. The blue pixels are then measured using Photoshop’s histogram function. Previous results indicate a need to calibrate this method to the conventional Helium gas expansion method due to the consistent underestimation of porosity values using PPIA. An attempt has been made to calibrate these two methods of determining sandstone porosity through analysis of well characterized sandstone standards. We find that the presence of various clay phases causes a significant underestimation of porosity from PPIA. This finding supports the speculations of previous workers that much o
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- Can Adobe Photoshop be Used to Quantify Sandstone Porosity?
