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In this paper, we propose new watermarking method for image copyright protection in spatial domain based on fuzzy image segmentation technique. The fuzzy image approach is employed to determine appropriate locations to hiding watermark by identifying the features map (edges regions) which are less sensitive to the human visual system. Our method optimizes robustness and imperceptibility which are known to be inversely proportional to each other. Transparency performance of proposed method was evaluated by four image quality measures are PSNR, SSIM and two similarity measures which are based on the fuzzy logic S1, S2. The evaluation results demonstrate the high robustness of the proposed algorithm against the common image processing operators. Our method is also is efficient as it only uses simple operations such image fuzzification and fuzzy image segmentation technique.