POWERSCAN® D8530

2.3.2Advanced Configuration Parameters

By default, for all Image Presets, the window has its origin coordinates equal to zero, its width equal to 1280 pixels and its height to 1024 pixels.

Brightness Adjustment is available in the range from –100% up to 100%, in steps of 1%. Positive values shift the luminance up so that the image will result brighter. Default value is 0%, meaning that no brightness adjustment is performed.

The same range of values (–100% up to 100%, in steps of 1%) is available for Contrast Adjustment. Positive values will increase the contrast, so that dark and bright objects inside the image will be better distinguishable. Default value is 0%, which means that no contrast adjustment is performed.

You can set the Image Color Depth by selecting 256 gray levels (default), 16 gray levels, or 2 gray levels. Higher color depths yield larger image files. This option is ignored if the JPEG format is selected,(256 gray levels only).

2.4AUTOSCANNING

2.4.1Normal Mode

PowerScan® D8530 provides an autoscan command (see page 73), which when enabled, causes the reader to scan continuously and to monitor the central zone of its reading area. In this way, PowerScan® D8530 is ready to capture any image (containing a potential code) positioned on a uniform background.

The aiming system can be enabled to indicate the reading area of the potential code to be captured. The illumination system can also be enabled when the ambient light conditions are not sufficient to autodetect the potential code to be captured; furthermore, the illumination system increases in intensity for an instant when capturing and decoding an image. A safety time may be defined to prevent PowerScan® D8530 from reading the same code repeatedly.

If the decoding is completed successfully, the reader starts monitoring the reading area again. In case of decoding failure, PowerScan® D8530 keeps on decoding until a potential code is present in the central zone of the reading area.

2.4.2Pattern Mode

The Autoscan pattern mode is particularly advised when reading barcodes positioned on a non-uniform background. In these cases PowerScan® D8530 may perceive some elements of the background as barcodes and start the decoding. To avoid this

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