Color or gray scanned images will be transformed to binary. Binary image has much smaller size on disk than color. Many OCR and barcode recognition applications require only binary images. It is recommended to use this option instead of scanning in Black/White mode if you want to get better quality of scanned documents.
RemoteDesktopTwain detects color content on a page. Binary by nature but saved as color page will be transformed to binary. This is usual situation when scanned pictures mixed with forms. After this filter all pictures will imported as colorful (no changes) and all forms (or other images that do not require color) will be converted to binary. So you can always scan color documents from hardware scanner and have the best result because black and white images will be transformed to binary and color pages will leave in color.
This option removes background. Image after this transformation will have white background and more easy to read from display. Also saving image to JPEG file after this filter makes size of file up to 40% less.