– If you need truly portable scanning software without installation, I can recommend:
While not a replacement for Photoshop, the built-in image processing tools are surprisingly robust for a portable app. Users can adjust brightness, contrast, and color balance on the fly. It also features automatic deskew (straightening crooked scans) and blank page removal, which is vital for duplex scanning (scanning both sides of a page) to ensure blank backsides don't clutter the final PDF. Scanitto Pro V2.7.15.198 Portable Full Version
Scanitto Pro is a Windows-based scanning application that utilizes the TWAIN interface to communicate with a wide variety of scanners. Unlike complicated image editors or bloated corporate suites, Scanitto Pro is built for speed and simplicity. It acts as a bridge between your physical hardware and your digital storage needs. – If you need truly portable scanning software
Even if you are a beginner, the interface is intuitive. Follow these steps: Scanitto Pro is a Windows-based scanning application that