6.10.3.3   Samples

The Sample Inspection Window provides the following options for viewing and editing samples:

Get an Overview of the Samples

Use the sorting mechanisms to get an overview over the samples displayed in this window.

• You can also sort the results within the Sample Inspection Window in ascending or descending order. To do this, click the feature that should be used for sorting (for example, Width or Symbol Name) or choose a sorting order in the menu View to sort the list. Note that this feature is only available for up to 1000 displayed elements.
• Enable the checkbox Display only incorrectly classified samples to filter the information displayed for samples that were not classified correctly.
• Choose between two general viewing options: Detailed View or Thumbnail. Select those viewing options either via the corresponding toolbar buttons or via the menu items of the menu View. Detailed View lists out all the symbol characteristics explained above, whereas Thumbnail provides a quick overview over the samples just showing a thumbnail image of each symbol and the symbol that was read.
• If you click a sample, its zoomed image is displayed in the lower left corner of the OCR Training File Browser.
• Directly view new samples that were saved to the training file via the OCR 助手.

Edit the Samples

• Copy a sample

  Select one or more samples in the Sample Inspection Window. In the Training File Window, they can then be copied to

  • another symbol in the same training file or
  • another symbol in a different training file.

  To copy and paste a sample, either

  • drag and drop the sample while pressing Shift,
  • press Ctrl+C followed by Ctrl+V, or
  • select the menu entry Edit ▹ Copy, followed by Edit ▹ Paste.

• Move a sample

  Select one or more samples in the Sample Inspection Window. They can then be moved in the Training File Window via drag and drop to

  • another symbol in the same training file or to
  • another symbol in a different training file

• Delete a sample

  Select one or more samples in the Sample Inspection Window. They can then be deleted

  • by pressing Del on your keyboard or
  • via the menu entry Edit ▹ Delete.

Note that you can also add variations for samples via the Generate Sample Variations dialog that can be opened via the corresponding toolbar button.

Check Samples for Correct Classification

The following actions describe how to improve the quality of a training file:

• Sort the samples by Correctness to see whether the correct symbol class was assigned. If Correctness is true, the value of Read Symbol is identical to the value of Symbol and thus the correct class was assigned. Otherwise the column is marked in red so that samples that do not belong to the symbol can easily be detected.
• Use the checkbox Display only incorrectly classified samples to view only samples that were classified incorrectly.
• Sort samples by Confidence, as this may provide a hint to classification problems.
• Edit Symbol Name to assign a sample to the correct symbol class if necessary. (This action is equal to moving a sample via drag and drop to another symbol in the Training File Window.)