There are several possible reasons why a scanner may not be recognizing scanned images.
1) The scanner may be dirty or dusty, which can cause it to miss the scanned image. Check to see if the scanner’s glass surface is clean, and use a damp cloth to wipe off any dirt that may be obstructing the scanning process.
2) The resolution of the scanned image may be too low, which can also cause it to not be recognized. Check to see what the settings of the scanner are, and make sure they are set to a high enough resolution for the image to be properly scanned.
3) If the scanner is connected to the computer via a USB cable, it may not be installed correctly. Disconnect the USB cable, and double-check that it is plugged in properly.
4) The scanner’s driver may need to be updated, as an outdated version could be causing problems with recognition. Open the Control Panel and select the “Hardware and Sound” option. Select the “Device Manager” option, then find the scanner on the list of devices. Right-click on the device and select “Update Driver Software.” Follow the instructions on-screen to update the driver.
5) The document feeder may be out of alignment, which could be causing the scanner to not recognize images. Check to see if the document feeder can be adjusted so that it is aligned properly.
6) If the problem is specific to certain types of documents or images, there may be something wrong with the scanner’s settings. Check the “Scan Settings” menu to make sure everything is set up correctly.
7) The scanner may need to be calibrated. Try running a calibration scan to make sure the scanner is properly calibrated.
Following these steps should help diagnose and fix the problem of why a scanner isn’t recognizing scanned images. If the problem persists after trying all of these solutions, the scanner may be faulty and a replacement may be necessary.