Orienta？？o indireta de imagens digitais usando telhados de duas águas como apoio de campo

this article presents an indirect method for image orientation using gable roofs derived from airborne light detection and ranging. appropriate gable roofs in the intensity pulse image, is visualy selected by the operator. thus, the regions of corresponding neighbouring planes are visually delimited and adjusted by the use of< least-squares adjustment method being computed the parameters of the planes. in the digital image, the corresponding gable roofs are visually selected and for each ridge line defined between the neighbouring planes, any one intermediate point is collected. finally, both parameters of the planes and intermediate points are used for determination of exterior orientation parameters of camera by using the proposed model with the conventional least-squares adjustment procedure. the paper describes the derivation of proposed mathematical model in detail and discusses the advantages and disadvantages of the approach compared to the conventional surveying one. the results obtained showed that the proposed model is likely to work out.