There are several possible reasons why your scanner may produce fuzzy or smudged images.
The first and most common reason is due to poor quality scans. This could be caused by a low resolution setting on your scanner, an unclean lens, or a low-quality document being scanned. Poor scans can create jagged edges and artifacts in the image, leading to blurry or smudged images.
Another possible cause of blurry scans is a slow scan speed. If the scan speed is too slow, it will not capture all the fine details in the document, resulting in a lower-quality image.
Thirdly, a dirty scanner glass can also lead to poor quality images. Even if the document is clean, dust and dirt particles on the scanner glass can cause smudging in the image. Therefore, it is important to keep the scanner glass clean to avoid this problem.
Finally, insufficient RAM can also affect the quality of a scan. When scanning large documents or large batches of images, the scanner must be allowed a sufficient amount of memory in order to process all the data. If the RAM is inadequate, it can lead to slower scans and blurry images.
To prevent fuzzy or smudged images when using a scanner, make sure the resolution is set correctly according to the specific needs of your project. Additionally, make sure that the document is clean and free of dust or other particles that may interfere with the scan. Clean off the scanner glas regularly and check that you have plenty of RAM assigned to the scanner. These steps should help ensure a high-quality scan.