An efficient robust watermarking scheme for digital images is presented,based on the discrete Gabor transforms(DGT),The watermark in digital images is hidden by changing their DGT coefficients to represent special low frequencies.In the proposed watermark-checking algorithm,the geometric transforms and corresponding matching method are applied for geometric transformed images in order to recover them for watermark-checking.The proposed scheme was tested by StirMark 4.0,a well-known software for testing watermarking schemes,and it performed successfully in almost all testing cases with high robustness and efficiency.