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1. we need to remove the bd and making it transparent and save file with the same name in PNG format
2. we have to resize each converted image in 2 different size -
a. 300X300 pixels , rename the file as s_same filename in .png format
b. 600X600 pixels, rename the file as l_same filename in .png format
Only 90 image files, and may have more work in future also.