Downloads: 1 | Views: 91 | Weekly Hits: ⮙1 | Monthly Hits: ⮙1

Analysis Study Research Paper | Engineering | Saudi Arabia | Volume 12 Issue 4, April 2023 | Rating: 4.6 / 10

Thickness of Glass Effect on the Accuracy of Photogrammetric Measurements

Mostafa A B EBRAHIM

Abstract: Accuracy is an important term in photogrammetric science. It is affected by several factors, which depend on the nature of the object and its circumstance. One of these factors is that the displacement of the object points image, which can be caused by light ray refraction. It is well known that if a light ray passes from one medium (e.g. air) through another medium (e.g. glass), which has parallel surfaces, it will refract through the second medium and emerge from the first medium parallel to its direction with displacement of its original way. In photogrammetric works, such properties cause inaccurate measurements due to displacement of the object?s point?s position in the images. The light ray refraction makes the object points appear in another position in the image, which cause direct effect in the photogrammetric measurements accuracy. Some photogrammetric applications need to be photographed from in front of a glass. In such cases, the glass thickness will affect the accuracy of photogrammetric measurements. In photogrammetric works, the term accuracy has a big role in 2D and 3D measurements. It is therefore important to investigate to which level the glass thickness will affect photogrammetric measurements. The aim of this research was to study the effect of glass thickness in the accuracy of 3D photogrammetric measurements.

Keywords: close range photogrammetry, accuracy, glass, 3D measurement, refraction

Edition: Volume 12 Issue 4, April 2023,

Pages: 844 - 849