Functional Differences Between TWAIN and WIA Scanners
To use the WIA scanner, download the WIA driver from the Web site, and install it on your computer.
Scanner
: Available
-: Not available
Function | TWAIN | WIA |
|---|---|---|
Scanning on the exposure glass |
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Scanning continuously using the ADF |
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Scanning using the ADF (Read-ahead) |
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Scanning a specified number of pages in a multi-page original using the ADF |
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Preview |
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Scanning in an application without displaying the user interface screen for scanning |
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*1 In the Read-ahead mode, the machine temporarily stores the scanned image on the hard disk drive of the machine and then transfers the image to the computer. The WIA scanner operates in the Read-ahead mode at all times.
*2 May not be specified in some applications.
*3 When using the WIA scanner, the changes made to the parameter settings are not applied to the preview. To apply the changes in the preview, perform the preview scan again.
Settings
: Available
-: Not available
Function | TWAIN | WIA |
|---|---|---|
Selecting the driver |
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Switch units (mm, inches, pixels) |
| - |
Compression |
| - |
Auto deskew |
| - |
Start scanning by pressing [Start] in the scanner *1 |
| - |
Registering the scan mode |
| - |
Specifying the original size when scanning on the exposure glass |
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Specifying the original size when scanning from the ADF |
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Orientation to set the original |
| - |
Text orientation |
| - |
One-sided scan |
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Two-sided scan |
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Two-sided scan (Top to Top, Top to Bottom) |
| - |
Resolution |
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Brightness |
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Contrast |
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Threshold: |
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Duotone (black and white) |
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256 shades of gray (grayscale) |
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8 colors |
| - |
16 million colors (full color) |
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Gamma correction |
| - |
Erase background |
| - |
Filters (filter, dropout color) |
| - |
Color correction (ICM, invert colors) |
| - |
Registering/deleting scan area |
| - |
Specifiable original size (entering the scan area manually) |
| - |
Combine/split |
| - |
Print settings |
| - |
*1 Press [Start] on the machine to start scanning.
*2 May not be specified in some applications.
Properties
: Available
-: Not available
Function | TWAIN | WIA |
|---|---|---|
Diagnostics (test scanner) | - |
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User Code authentication |
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General user authentication |
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Specifying the scanner to use |
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SNMP V3 authentication information |
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Version information |
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