Thin

Before After

 

Thin thins the raster image.

 

Thin the whole image

1. Raster Effects Menu > Thin > Standard thins the raster image with a bias towards retaining curves:

Before

After Thin > Standard

 

Raster Effects Menu > Thin > Ortho thins the raster image with a bias towards retaining orthogonal lines:

Before

After Thin > Ortho

 

Select Raster Effects Menu > Thin > Standard or Raster Effects Menu > Thin > Ortho.

2. In the Preview Window, zoom into the image so that you will be able to clearly see the effects of the thinning.
Warning: If you display a large section of your raster image in the Preview Window this function may operate very slowly.
3. Select a number of thinnings by moving the slider in the dialog.

The number of thinnings is the number of times Scan2CAD goes through the image stripping a layer of pixels off it. The larger the number you choose, the more thinned the image will be although it will never be thinned right away – Scan2CAD will always retain an image one pixel thick.

As you move the slider you will see the raster image in the Preview Window getting thinner and thicker.

4. Zoom and pan around the image in the Preview Window to make sure the number of thinnings you have chosen is appropriate to other parts of the image.

Adjust the number of thinnings if necessary.

5. Ensure the Apply changes to Full Image option is selected.
6. Click OK.

 

Click to undo.

 

Thin part of the image

If you only want to thin part of the image, choose the part you want to thin by windowing it or zooming into it, then follow the steps above. In Step 5, ensure the Apply changes to Full Image option is not selected.

 

Special note for color images

If you are working with a color raster image you can modify the way that Thin works by selecting a Pick Color.

 

Before

After: no Pick Color

If no Pick Color is selected Scan2CAD thins entities of any color that are on a white background.

 

Before

After: Pick Color = blue

If a Pick Color is selected Scan2CAD thins Pick Colored entities only, regardless of the background color they are on.

 

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