# A Modified Dot-Pattern Moiré Fringe Topography Technique for Efficient Human Body Surface Analysis

## TL;DR

This paper introduces a modified Moiré Fringe Topography technique using dot patterns to improve accuracy and efficiency in analyzing human body surface curvatures.

## Contribution

The novel contribution is a dot-pattern-based Moiré Fringe Topography method that simplifies data acquisition while maintaining precision.

## Key findings

- The dot-pattern approach reduces distortion and complexity in capturing surface curvatures.
- Using a SPAD image sensor enhances the accuracy of Moiré pattern capture.
- The technique maintains precision while streamlining the data acquisition process.

## Abstract

Raster-stereography and Moiré Fringe Topography are widely recognized as effective techniques for surface screening. Traditionally, these methods have been applied in various medical and clinical contexts, such as assessing human body symmetry, analyzing spinal deformities, evaluating scapular positioning, and predicting trunk-related abnormalities. Both techniques have proven to be reliable tools for examining the human body surface and identifying health-related issues. However, in these techniques, line grids projected onto non-uniform surfaces often break or distort, complicating curvature detection. Capturing and digitizing these distortions through photographymeans further reducing accuracy due to low contrast between background and projected lines. In this paper, we present a modified, i.e., dotted-based, approach to Moiré Fringe Topography construction, offering a simpler, more accurate, and efficient method for recording human body surface curvatures. The proposed technique significantly reduces the complexity of the data acquisition process while maintaining precision in surface analysis. A Single-Photon Avalanche Diode (SPAD) image sensor was used to capture the Moiré patterns.