An Accurate Method for Calculating the Symmetry Axis of an Object in a Quasi-Binary, High resolution Digital Image
Abstract
The purpose of this paper is to derive an algorithm for determining the angle (with respect to horizontal) of the axis of symmetry of an object in a gray-scale image. In order for this method to be effective, the image must have sufficient resolution (examples in this paper had on the order of 800,000 pixels). In addition, the image must be quasi-binary, i.e., the background must be relatively homogeneous, and the object of interest must be the largest object in the image. The motivation for this algorithm is to calculate yaw angles of projectiles during flight whose images are captured and processed by the Automated Small-Arms Photogrammetry (ASAP) software (written in MATLAB) at the U.S. Army Combat Capabilities Development Command (DEVCOM) Armaments Center (AC), Picatinny Arsenal, NJ. This algorithm has several benefits: it is robust (works even with blurry, truncated, or marred images), it is relatively simple to code, and it requires minimal a priori knowledge of the shape of the object.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 21, 2024
- Accession Number
- AD1224265
Entities
People
- Kenneth Hohnecker