Análisis comparativo entre los software de prueba Agisoft Photoscan y Pix4D para el procesamiento de datos obtenidos con fotogrametría de vehículo aéreo no tripulado (UAV) de bajo costo aplicado a proyectos de medio ambiente

Abstract

This research has the objective of determinating the characteristics of the trial period of software packages Agisoft PhotoScan and Pix4D for the processing of aerial images based on a comparative analysis of processing times, quality of ortomosaic generated and used tools to determinate surface and volume measurements for its application in environmental projects with low cost unmanned aerial vehicle (UAV or drone). Two surveys were carried out with a UAV model Phantom 4 Pro. The surveys correspond to a quarry located in the city of Ambato and a group of private lands located in the city of Riobamba. The contour lines, ortomosaic and processing report generated by each software were obtained for the two projects. In addition, the volume of the quarry and the surfaces of the lands were determinated in order to evaluate the attributes presented by each software package. The results indicate that the processing time for Agisoft was 3.3 times higher than Pix4D for the private lands project and 2.4 times higher for the quarry project. The visual quality of the ortomosaics generated by the two software packages present the same sharpness and image detail without any significant difference. Regarding the generation of contours, Pix4D presents smoother and uniform contours while Agisoft shows irregular contours with overlaping in some segments. The attributes of these software packages for determination of surfaces are very similar and they present the same ease of handling. For volume calculation Pix4D provides more options than Agisoft for specific jobs.