“…Preprocessing is normally performed in almost all sorts of image analysis and classification to remove the unnecessary detail and enhance the input image quality for better performance (Adeel et al, 2020; Al‐Ameen et al, 2015; Amin, Sharif, Raza, Saba, & Anjum, 2019; Amin, Sharif, Raza, Saba, & Rehman, 2019; Amin, Sharif, Raza, Saba, Sial, & Shad, 2019; Amin, Sharif, Rehman, Raza, & Mufti, 2018; Amin, Sharif, Yasmin, Saba, & Raza, 2019; Ejaz et al, 2018; Ejaz et al, 2020; Iqbal et al, 2019; Iqbal, Ghani, Saba, & Rehman, 2018; Iqbal, Khan, Saba, & Rehman, 2017; Javed, Rahim, & Saba, 2019; Javed, Rahim, Saba, & Rashid, 2019; Javed, Rahim, Saba, & Rehman, 2020; Javed, Saba, Shafry, & Rahim, 2020; Saba, 2020; Saba, Bokhari, et al, 2018). Accordingly, in the proposed approach, image intensities are normalized using histogram equalization (Ali et al, 2016) and Gaussian un‐sharp mask is applied to enhanced its quality.…”