Aerospace Instrument-Making Annotation << Back The Use of Bidirectional Image Scaling Based on Wavelet Transforms to Increase Video Compression of Unmanned Aerial Vehicles Gavrilov I.A., Akhmedova A.Kh., Puziy A.N., Alkhamov R.R. The method for increasing the effi ciency of video compression in applied television systems and UAVs is discussing in the article. It is based on the preliminary reduction of the original image sizes by twofold, both horizontally and vertically, and the restoration of their size subsequent to decoding. A bidirectional image scaler software was created to accomplish this objective. It uses a lifting mechanism of wavelet transforms based on the LeGall (5.3), Deslauriers-Debuc (9.7), and Deslauriers-Debuc (13.7) wavelet fi lters realized in the Dirac video codec. There are results of experimental studies of the joint operation of the developed scaler and Dirac video codec at the article. Keywords: digital television, video compression, images scaling, video streams, wavelet transformations, video codec Dirac. DOI: 10.25791/aviakosmos.2.2025.1460 Pp. 22-30.