Exclude paper white patches with IZTrack - SpectroJet and SpectroDens
Certain papers types can cause an incorrect reading of the leading paper white area on the sides of the colorbar.
The sample below shows a paper white patch at the end of the measured colorbar which should be excluded.
The sample below shows a paper white patch at the end of the measured colorbar which should be excluded.
Paper white patches on start and end of the scan are removed by the following logic:
1. The first scan measurement of a newly created job uses the L value from the selected targetset with double tolerance to detect and exclude the paper white on the side of the colorbar. The default tolerance is 2 for the initial scan it becomes 2 x 2 = 4.
2. The second measurement uses the measured paper white patch from the colorbar itself plus the default tolerance.
3. If paper white patches on the side are not detected as such then slightly increase the tolerance for the white paper detection in document. Open the database with this link:
Go to the key called max_L_tolerance . Its by default on 2. A larger tolerance value excludes paper white patches with low L value on the side of the measurement.