3. Making a Scan

From the PhotoShop [File] select the [Import] option, then the [TWAIN_32...] sub-option.

The Epson TWAIN scanning module should then be loaded.

Before, you start scanning, you need to specify three sets of details that will affect how the scan is made:

  • The Source for the image - this can be:

    • Flatbed - for material being scanned from paper, photo etc.

    • TPU for Neg. Film - for film negatives

    • TPU for Pos. Film - for slides

The Image Type - for real colour photos 24-bit Color (Std) is the best setting to use. For pictures scanned from magazines or newspapers, use the 24-bit Color De-Screening. For black-and-white diagrams, the Line Art setting may be preferable. The Help button will give more information about all the options. Choosing an image type, sets good default values for the other settings such as Pixel Depth which generally should not need changing. Click OK to accept the new settings.

The Destination - choose the option that best corresponds to where the image will be displayed or printed. The most commonly used options here are Screen/Web or whichever of the printer options is most relevant. The Help button will give more information about all the options. Choosing a Destination, sets good default values for the other settings such as Resolution (measured in dots per inch). The higher the resolution, the better the image quality but the bigger the size of the image file.

For a printed original, the best guide is to choose a resolution that matches the resolution of the intended output device. The printed or displayed image will then be about the same size as the original.

  • For screen display, 72 or 96dpi are good values.
  • For printed output 150-200dpi is fine for colour photos; black-and-white diagrams and line-drawings may need 300dpi for good results.

For a slide original, the resolution needs to be higher, but again it depends how the image is to be used. A 35mm slide scanned at 400dpi will occupy about a quarter of a typical display screen. At 800dpi, it will occupy the whole screen.

The [Unsharp Mask] option performs automatic sharpening of photos. Click OK to accept the new settings.

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