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When Using the TWAIN Driver

This section explains the relationship between resolution and scan size when using the machine as a TWAIN scanner.

To specify the scan area or resolution for the machine you are using as a network TWAIN scanner, see the TWAIN driver Help.

Note

  • You might not be able to scan large originals if the client computer has insufficient memory, is running other applications, or if its operating system has restriction settings in place.

  • Certain original types and resolution settings can reduce scanning quality.

If [Binary(Text)] or [Binary(Photo)] is selected in [Col./Grad.:]

The scan size determines the maximum possible resolution.

Refer to the table below for the maximum resolution available for each scan size.

Scan size and maximum resolution

Scan size

Maximum resolution (dpi)

Maximum, 36 × 48, 36 × 24

600

Engineering E (34 × 44), 34 × 22

635

A0 × 2, A0

652

30 × 42, 30 × 21

720

B1 JIS

753

Architecture D (24 × 36), 24 × 18

899

A1 × 2, A1

923

Engineering D (22 × 34), 22 × 17

981

B2 JIS

1065

Architecture C (18 × 24), Engineering C (17 × 22), A2, B3 JIS, Architecture B (12 × 18), 18 × 12, 12 × 14.5, A3, Tabloid (11 × 17), 17 × 11, 11 × 15, 11 × 14, 11 × 9.5, B4 JIS, Architecture A (9 × 12), 12 × 9, Legal (8.5 × 14), Folio (8.5 × 13), German Standard Fanfold (8.5 × 12), 12 × 8.5, Letter (8.5 × 11), 11 × 8.5, A4

1200

If [8 Colors] or [8 Colors(Photo)] is selected in [Col./Grad.:]

The scan size determines the maximum possible resolution.

Refer to the table below for the maximum resolution available for each scan size.

Scan size and maximum resolution

Scan size

Maximum resolution (dpi)

Maximum

323

36 × 48, 36 × 24

600

Engineering E (34 × 44), 34 × 22

635

A0 × 2, A0

652

30 × 42, 30 × 21

720

B1 JIS

753

Architecture D (24 × 36), 24 × 18

899

A1 × 2, A1

923

Engineering D (22 × 34), 22 × 17

981

B2 JIS

1065

Architecture C (18 × 24), Engineering C (17 × 22), A2, B3 JIS, Architecture B (12 × 18), 18 × 12, 12 × 14.5, A3, Tabloid (11 × 17), 17 × 11, 11 × 15, 11 × 14, 11 × 9.5, B4 JIS, Architecture A (9 × 12), 12 × 9, Legal (8.5 × 14), Folio (8.5 × 13), German Standard Fanfold (8.5 × 12), 12 × 8.5, Letter (8.5 × 11), 11 × 8.5, A4

1200

If [Grey Scale] or [16770K colors] is selected in [Col./Grad.:] and data is compressed

The scan size determines the maximum possible resolution.

Refer to the table below for the maximum resolution available for each scan size.

Scan size and maximum resolution

Scan size

Maximum resolution (dpi)

Maximum

150

36 × 48, 36 × 24

600

Engineering E (34 × 44), 34 × 22

635

A0 × 2, A0

652

30 × 42, 30 × 21

720

B1 JIS

753

Architecture D (24 × 36), 24 × 18

899

A1 × 2, A1

923

Engineering D (22 × 34), 22 × 17

981

B2 JIS

1065

Architecture C (18 × 24), Engineering C (17 × 22), A2, B3 JIS, Architecture B (12 × 18), 18 × 12, 12 × 14.5, A3, Tabloid (11 × 17), 17 × 11, 11 × 15, 11 × 14, 11 × 9.5, B4 JIS, Architecture A (9 × 12), 12 × 9, Legal (8.5 × 14), Folio (8.5 × 13), German Standard Fanfold (8.5 × 12), 12 × 8.5, Letter (8.5 × 11), 11 × 8.5, A4

1200

If [Grey Scale] is selected in [Col./Grad.:] and data is not compressed

The scan size determines the maximum possible resolution.

Refer to the table below for the maximum resolution available for each scan size.

Scan size and maximum resolution

Scan size

Maximum resolution (dpi)

Maximum

198

36 × 48, 36 × 24

600

Engineering E (34 × 44), 34 × 22

635

A0 × 2

519

A0

652

30 × 42, 30 × 21

720

B1 JIS

753

Architecture D (24 × 36), 24 × 18

899

A1 × 2

734

A1

923

Engineering D (22 × 34), 22 × 17

981

B2 JIS

1065

Architecture C (18 × 24), Engineering C (17 × 22), A2, B3 JIS, Architecture B (12 × 18), 18 × 12, 12 × 14.5, A3, Tabloid (11 × 17), 17 × 11, 11 × 15, 11 × 14, 11 × 9.5, B4 JIS, Architecture A (9 × 12), 12 × 9, Legal (8.5 × 14), Folio (8.5 × 13), German Standard Fanfold (8.5 × 12), 12 × 8.5, Letter (8.5 × 11), 11 × 8.5, A4

1200

If [16770K colors] is selected in [Col./Grad.:] and data is not compressed

The scan size determines the maximum possible resolution.

Refer to the table below for the maximum resolution available for each scan size.

Scan size and maximum resolution

Scan size

Maximum resolution (dpi)

Maximum

150

36 × 48

401

Engineering E (34 × 44)

431

A0 × 2

299

A0, A1 × 2

424

30 × 42

470

30 × 21

665

B1 JIS

489

Architecture D (24 × 36)

567

36 × 24

568

A1

600

Engineering D (22 × 34), 34 × 22

610

B2 JIS

692

Architecture C (18 × 24), 24 × 18

803

Engineering C (17 × 22), 22 × 17

863

A2

849

B3 JIS

979

Architecture B (12 × 18)

1135

18 × 12

1136

12 × 14.5, A3, Tabloid (11 × 17), 17 × 11, 11 × 15, 11 × 14, 11 × 9.5, B4 JIS, Architecture A (9 × 12), 12 × 9, Legal (8.5 × 14), Folio (8.5 × 13), German Standard Fanfold (8.5 × 12), 12 × 8.5, Letter (8.5 × 11), 11 × 8.5, A4

1200