02086naa a2200325 a 450000100080000000500110000800800410001910000200006024501230008026000090020330000140021252010920022665000160131865000150133465000150134965000160136465000120138065300330139265300280142565300150145365300100146865300110147865300320148965300110152170000190153270000210155170000180157270000170159077301530160710269902018-06-20       1996    bl ---       0--  u    #d1 aCRUVINEL, P. E.  aAn automatic method based on image processing for measurements of drop size distribution from agricultural sprinklers.  c1996  ap. 39-46.  aThe drop size distribution of sprinkler spray is of practical importance for two reasons. The first one is because the small droplets are subject to wind drift, distorting the application pattern. Second, large droplets possess greater kinetic energy which is transferred to the soil surface causing particle dislodgment and pudding that may result in surface crusting and runoff. We present in this paper a technique based on image processing for measure drop size distribution from agricultural sprinklers in automatic mode. This technique has the advantage of being a direct measurement method that allows to know the characteristics of agricultural sprinklers, which allows to study the effects of pressure and nozzle size on the distributions. The method was obtained using properties of the Fourier for correlation analysis in frequency domain. Results allow both farmers to change on existing irrigation systems to cope with field problems caused by low intake rates and runoff and development work to improve the uniformity of distribution of sprays from agricultural sprinklers.  acorrelation  airrigation  asprinklers  aIrrigação  aMétodo  aAgricultural instrumentation  aAgricultural sprinklers  aCorrelacao  aImage  aImagem  aInstrumentacao agropecuaria  aMethod1 aMINATEL, E. R.1 aMUCHERONI, M. L.1 aVIEIRA, S. R.1 aCRESTANA, S.  tIn: SIMPOSIO BRASILEIRO DE COMPUTACAO GRAFICA E PROCESSAMENTO DE IMAGENS, 9., out. 1996, Caxambu, MG. Anais do SIBGRAPI 96. Caxambu: SBC/UFMG, 1996.