Image analysis of solid-liquid interface morphology in freezing solutions

摘要

This paper describes a system which analyzes a sequence of images of the mobile solid-liquid interface during the process of solidification in freezing solutions. The specific objective is to measure the two-dimensional morphology of the varying interface. The three stages that typify the temporal evolution of this boundary through varying temperature conditions are planar, cellular and dendritic. Image analysis techniques were developed for identifying these solid-liquid interfaces and extracting the corresponding boundaries. Statistical measures of shape were utilized in distinguishing between various patterns of growth in the solid phase. Performance of the system is depicted in several illustrative examples.