iPB4 Biometric Device Range
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Installation & User Guide
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Rev 07 ©2017-2018 iPulse Systems
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IMAGE ENHANCEMENT
Before we can analyze the image, we need to clean it up a little: reduce noise, sharpen and enhance the
difference between ridges and valleys in the image, optimize the contrast and generally improve the image
quality as much as we can.
IMAGE ANALYSIS
Using the enhanced image, we move to analysis. In this step, we select the background region to mark
smeared or smudged regions which shouldn’t be used as part of the template. Once those have been
isolated, we split the image into blocks and determine their direction.
BINARY PROCESSING
Analysis complete, we carefully convert the image to binary. To do this, the grayscale image is converted
to a black and white image. Once in black and white, the image can be digitized into ones and zeroes, as
shown in the images below.
Figure 16 - Analysed image with
background and smudges removed
Figure 15 - Base to Enhanced Images
Summary of Contents for iPB4
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