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Scan using Colortrac SmartLF Scanner dialog

The Scan using Colortrac SmartLF dialog appears when you select File Menu > Acquire > Load from Colortrac SmartLF.

It allows you to select the following options when scanning using a Colortrac SmartLF scanner.

 

Colortrac Scanner Model

Select the Colortrac scanner model you have. You only need to do this the first time you scan.

 

Connect Using

If you have a Colortrac SmartLF Ci or Gx+ series scanner, you can choose to connect to it via USB or Ethernet.

If you choose the Ethernet option, you must enter values in the IP Address, Command and Data Port fields. These values should be set according to the documentation supplied with your Colortrac scanner.

 

Color

Select Color to create a color raster image (16.7 million colors).

You should only select Color if you are scanning a color drawing with a view to converting it to a color DXF file. Do not select Color if you are scanning a black and white drawing.

Warning: Color images can be very large. An E or A0 size drawing scanned in color at a resolution of 300 dpi will take up about 385Mb of memory.

 

Grayscale

Select Grayscale to create a grayscale raster image (256 shades of gray).

Grayscale images are not normally suitable for raster to vector conversion. You should only select this option if you are going to use Scan2CAD�s threshold functions to create a black and white image after scanning. See About thresholding, Simple Threshold and Adaptive Threshold.

Warning: Grayscale images can be very large. An E or A0 size drawing scanned in grayscale at a resolution of 300 dpi will take up about 128Mb of memory.

 

Monochrome (Simple Threshold)

Select this option to create a two color (black and white) raster image using a simple threshold.

Select a threshold using the slider bar.

Rather than using this option, where you need to guess the correct threshold for your drawing, we strongly suggest that you scan your drawing using the Grayscale option. After scanning in grayscale you can use Raster Effects Menu > Threshold > Simple () inside Scan2CAD to convert the image to black and white. This will allow you to experiment with different thresholds without having to rescan the drawing.

Once you have found a suitable threshold you can use it as the threshold when scanning similar drawings using Monochrome (Simple Threshold) in future.

 

Monochrome (Adaptive Threshold)

Select this option to create a two color (black and white) raster image using an adaptive threshold.

Select Window and Background values using the slider bars.

Rather than using this option, where you need to guess the correct threshold for your drawing, we strongly suggest that you scan your drawing using the Grayscale option. After scanning in grayscale you can use Raster Effects Menu > Threshold > Adaptive () inside Scan2CAD to convert the image to black and white. This will allow you to experiment with different Window and Background values without having to rescan the drawing.

Once you have found suitable Window and Background values you can select them as the values to use when scanning similar drawings using Monochrome (Adaptive Threshold) in future.

 

Paper Size and Orientation

If you select Auto Size the scanner measures the paper size of the drawing before scanning it.

Select Auto Size if:

You are scanning a drawing that you are not sure of the size of.
You are scanning a lot of differently sized drawings. Using Auto Size saves you from having to remember to select the correct paper size and orientation before each scan.

 

Once you have done a scan using Auto Size, the width and length of the drawing as measured by Auto Size are posted to the Custom Size option.

This is useful if you have selected Rewind after scan. When Rewind after scan and Auto Size are both selected an Auto Size will be performed before each rescan. If you change the Paper Size from Auto Size to Custom Size after the first scan, the Custom Size will be used for all rescans and no further Auto Sizes will be done.

 

If you select a specific paper size you also need to select the correct Orientation. Select Portrait if you are feeding the short side of the paper into the scanner. Select Landscape if you are feeding the long side of the paper into the scanner.

If you select an incorrect Paper Size or Orientation only part of your drawing may be scanned.

 

Resolution

200 to 400 dpi is optimal for most line drawings.

In the SmartLF 4080 series scanners, 600 dpi is an interpolated resolution. In all other SmartLF scanners, it is an optical resolution.

 

Paper Handling

If you select Eject after scan the scanner ejects the paper after scanning.

If you select Retain after scan the scanner holds the paper after scanning.

If you select Rewind after scan the scanner rewinds the paper back after scanning so you can scan the drawing again without having to refeed the scanner.

Rewind after scan is useful if you are experimenting with resolution settings to determine the best settings for the drawing you are scanning.

Warning if you are using a 4080 series scanner: When Rewind after scan is selected, the end of each scan is cropped. Once you have determined appropriate threshold and resolution settings you need to select Eject after scan or Retain after scan before doing your final scan.

 

Rotate Image

Scan2CAD automatically rotates the scanned image by the angle you select.

If you select the wrong rotation angle you can rotate the drawing to the correct orientation after scanning using Raster Effects Menu > Rotate > By Degrees.

 

Auto Deskew

If you select Auto Deskew Scan2CAD will attempt to automatically deskew images that are scanned skew.

You can only select Auto Deskew if Monochrome (Simple Threshold) or Monochrome (Adaptive Threshold) are selected.

If Color or Grayscale are selected you can deskew your image after scanning using Raster Effects Menu > Rotate > By Line ().

 

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