Adobe Photoshop CS4 requires a TWAIN plug-in to recognize your scanner and for you to be able to select your scanner from the File > Import menu. 32-bit editions of Photoshop CS4 install this plug-in by default, but 64-bit editions require a 64-bit version of this plug-in, which has not been released yet by either Adobe or Microsoft.
You can try the following workaround options to scan into 64-bit editions of CS4:
- Use Epson Scan to scan and save your images to your hard drive, and then open them in Adobe Photoshop CS4 (64-bit). We recommend saving your images as TIFF files since they offer better compatibility and TIFF is a lossless (data is not lost) file format.
- Use the Windows Image Acquisition (WIA) from the File > Import menu to import images from the scanner.
Note: The WIA driver does not offer all the features and control provided by the Epson Scan driver. It also does not support scanner options such as a Transparency Unit (TPU) for film scanning or an Auto Document Feeder.
- Use Photoshop CS4 (32-bit) to scan using the File > Import menu. You can then save the file and re-open it in Photoshop CS4 (64-bit).
Note: Both a standard 32-bit version and a 64-bit version of CS4 are installed by default when you install Adobe Photoshop CS4 on a Windows 64-bit operating system. (You can override this default setting when you install the program.)
For more information, please refer to Adobe knowledgebase article ID: kb405072 on Adobe's