### ISO 15415 Verification Tool Parameters

##### Verification Settings

Click the Verification Settings area of the parameters to bring up the controls for Aperture, Lighting, and Setup Notes.

- Aperture automatically sets the aperture size to the user-defined percentage of the decoded cell size. Choose Auto if you want the aperture size to be set automatically based on the symbol's cell size. The aperture is set to 50% of the cell size by default. Trun Auto off if you want to enter the Aperture value manually. When Auto is de-selected, a dropdown menu appears allowing you to enter units in mil or mm.

- Lighting Wave Length specifies the wavelength of the lighting being used. Note that this value is for reporting only and does not affect verification results.

- Lighting Angle specifies the angle of the lighting being used. Note that this value is for reporting only and does not affect verification results.

- Setup Notes allows you to record any additional information that needs to be considered about your camera or lighting configuration.

##### Calibration

Click the Calibration section of the parameters to bring up the dialog shown below. The Calibration dialog features simple instructions about how to calibrate your camera and the Verification Tool in order to be compliant with your chosen verification specification. You must have a Calibration card in order to calibrate your system.

Use this dialog to enter the data from your Calibration card, and then click the Calibrate button to start the process.

As part of the calibration process, the Exposure Time setting of your camera will be adjusted. Use the Maximum Exposure value in the Calibration dialog to set the maximum Exposure Time that can be set.

Precautions for Correct Use: Verification tools must be calibrated first to achieve accurate results.

##### Custom Verification

When you click the box next to Enable Customized Verification Tests, you will see the dialog shown below. This dialog allows you to select the individual attributes on which the verification will be based, and to define Good/Fair/Poor ranges for each attribute.

Precautions for Correct Uset: Disabling parameters using the Custom Verification dialog results in a verification process that no longer strictly conforms to the ISO 15415 standard.

ISO 15415 Verification Parameters

- Symbol Contrast: The difference in the population of dark pixels to the population of light pixels; compares to AIM DPM/ISO 29158 “Cell Contrast”.

- Modulation: In ISO/IEC 15415, a measurement of the uniformity of the color of the dark areas and the light areas of the Data Matrix similar to “Cell Modulation”, but differs in the implementation details.

- Reflectance Margin: A measurement of how well each module is correctly distinguishable as light or dark in comparison to the global threshold.

- Fixed Pattern Damage: A measurement of the errors in the borders of the Data Matrix as well as any errors in the quiet zone around the symbol necessary for the decoding process.

- Axial Nonuniformity: The difference between the height and the width with respect to the rows and columns.

- Grid Nonuniformity: This measurement is a delta of the difference of the measured grid in relation to the ideal grid formed from the four corners of the Data Matrix.

- Unused Error Correction: The amount of error correction that could be read incorrectly when the symbol is still readable that is currently being read correctly, expressed as a percentage.

- Print Growth: The positive or negative size relation of the cells as printed with respect to the ideal grid.