Information background eraser        

 

This is how you can use the background eraser :

  1. Select the tool background eraser from the worksheet. (It's grouped with the Eraser tool.)

  2. Select in the palette options for tool the brush point, size, cover, hardness and other options.
    When the opacity settings on 100% has been established, pixels complete transparency are made.
    At a lower opacity pixels partial transparency become

  1. Tolerance: Stipulates how precise the selected pixels match the sampled pixel must .
    The range is 0 up to 200.
    At lower settings only pixels with very similar colors are erased.
    At higher settings more pixels are erased.
    (This edit box is not available as the Auto Tolerance check box is marked)

  2. Sampling: How the tool determines what pixels to erase:

Once: samplet in the middle of the brush where you click first, and knew all corresponding pixels during the stroke.
Continuous: samplet at each step in the middle of the brush and knew all corresponding pixels.
Back swatch all pixels which correspond to the current background color on the palette instead of sampling from the image.
Fore swatch: all pixels which correspond to the current forefront color on the palette instead of sampling from the image.

Discontiguous: Erase all pixels in the tools path that match the sampled pixels, even if they are discontinuous (non adjacent)
Use this mode on images that show the background through holes in the image.

Contiguous: Erase only contiguous pixels that match sampled pixels.
Use this mode when the background pixels are close in colors to the edges of the object you want to isolate.

Find edges); Finds restricts the brush erasing  according to the edge information.

If the image has more than one layer, on the layer palette, click the layer that has an object that you want isolate by erasing the background