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This section explains the relationship between resolution and scan size when using the TWAIN driver with the machine.
To specify the scan area or resolution on the machine you are using as a network TWAIN scanner directly, see the TWAIN driver Help.
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 |
Maximum resolution (dpi) |
|---|---|
Maximum*, 36 × 48 |
600 |
Engineering E |
635 |
A0 × 2, A0 |
652 |
30 × 42 |
720 |
B1 JIS |
753 |
Architecture E |
899 |
A1 × 2, A1 |
923 |
Engineering D |
981 |
B2 JIS |
1,065 |
A2, A3, A4, B3 JIS, B4 JIS, Architecture C, Engineering C, Architecture A, 11 × 17, 81/2 × 14, 81/2 × 11 |
1,200 |
* The value is valid only when the file format converter is installed. When compressing data without the file format converter, the maximum resolution is limited to 150 dpi.
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 |
Maximum resolution (dpi) |
|---|---|
Maximum*, 36 × 48 |
324 |
Engineering E |
635 |
A0 × 2, A0 |
652 |
30 × 42 |
720 |
B1 JIS |
753 |
Architecture E |
899 |
A1 × 2, A1 |
923 |
Engineering D |
981 |
B2 JIS |
1,065 |
A2, A3, A4, B3 JIS, B4 JIS, Architecture C, Engineering C, Architecture A, 11 × 17, 81/2 × 14, 81/2 × 11 |
1,200 |
* The value is valid only when the file format converter is installed. When compressing data without the file format converter, the maximum resolution is limited to 150 dpi.
If [Gray 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 |
Maximum resolution (dpi) |
|---|---|
Maximum, 36 × 48 |
150 |
Engineering E |
635 |
A0 × 2, A0 |
652 |
30 × 42 |
720 |
B1 JIS |
753 |
Architecture E |
899 |
A1 × 2, A1 |
923 |
Engineering D |
981 |
B2 JIS |
1,065 |
A2, A3, A4, B3 JIS, B4 JIS, Architecture C, Engineering C, Architecture A, 11 × 17, 81/2 × 14, 81/2 × 11 |
1,200 |
If [Gray 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 |
Maximum resolution (dpi) |
|---|---|
Maximum |
198 |
A0 × 2 |
520 |
36 × 48 |
600 |
Engineering E |
635 |
A0 |
652 |
30 × 42 |
720 |
A1 × 2 |
736 |
B1 JIS |
753 |
Architecture E |
899 |
A1 |
923 |
Engineering D |
981 |
B2 JIS |
1,065 |
A2, A3, A4, B3 JIS, B4 JIS, Architecture C, Engineering C, Architecture A, 11 × 17, 81/2 × 14, 81/2 × 11 |
1,200 |
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 |
Maximum resolution (dpi) |
|---|---|
Maximum |
150 |
A0 × 2 |
300 |
36 × 48 |
402 |
A0 |
424 |
A1 × 2 |
425 |
Engineering E |
432 |
30 × 42 |
471 |
B1 JIS |
490 |
Architecture E |
568 |
A1 |
601 |
Engineering D |
611 |
B2 JIS |
693 |
Architecture C |
804 |
A2 |
850 |
Engineering C |
864 |
B3 JIS |
981 |
A3, A4, B4 JIS, Architecture A, 11 × 17, 81/2 × 14, 81/2 × 11 |
1,200 |
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.
