Figure 6
From: Quantification of floating riverine macro-debris transport using an image processing approach
Schematic image of the area flux calculation by applying the template matching method. The template plane (bold outline area) is defined in the analysis plane (light grey area) at t = tk, and its position is arbitrary. I and J are the numbers of pixels in the x and y directions, respectively. The scanning plane (bold dashed outlined area) is searched in the analysis plane at t = tk+1 using the template matching method (Eq. (8)). The differential area between the template and scanning planes is the plane used to calculate the area flux (grey area) and is called as calculation area. The number of debris pixels in the calculation plane, namely, the transport area (black area), is counted. The area flux is calculated with Eq. (11) using the number of debris pixels. Note that the floating macro-debris is shown by the grey and black dashed outline areas at t = tk and t = tk+1, respectively.
