Despeckle filter

Use this filter to remove small noise from the image before recognition.

Select one of the following variants:

 
  • Try original then despeckled images: the component first tries to detect barcodes in the original image, then removes speckles from the image and tries to detect barcodes in the despeckled image.
  • OCR original image only: the component tries to detect barcodes in the original image only. This is the default value.
  • OCR despeckled image only: the component removes speckles from the image and tries to detect barcodes in the despeckled image.

You can use an RRT in this combo box. The RRT must have one of the following values (case-insensitive):

  • YES: the OCR despeckled image only option will be selected.
  • NO: the corresponds to OCR original image only.
  • BOTH: this corresponds to Try original then despeckled images.

If the RRT has a different value, the default option will be selected.

The two figures illustrate this preprocessing method.

Figure 1. Image before preprocessing
Figure 2. Image after preprocessing