Abstract: Thecalibrationaccuracydeclineswhenthereisrelativelocationchangebetweenthecameraandtheintegratingsphereintheprocessofnon-uniformitycalibration.Anewmethodofrelativeradiometriccalibrationusingmulti-positionfuseddatawasproposed.Toeliminatetheshortcomingofangularandfacialnon-uniformityoftheintegratingsphere,thecalibrationcoefficientswereobtainedbyalotofimagesfrommulti-positions.Experimentresultsshowthattheproposedmethodcandecreasetheeffectofnon-uniformityofthespherelightintensityonthecalibrationcoefficients,undertheconditionthatthelightintensityoftheintegratingsphereisunevenandtherelativepositionbetweenthecameraandthespherecannotbefixed.Thisnewmethodcanimprovethenon-uniformitycalibrationaccuracy.

Key words: Multi-positionfuseddata, Non-uniformity, Calibrationcoefficient, Relativelocation, Spacecamera