An improved method with a higher identifying accuracy rate is presented to identify computer graphics(CG) generated by rendering software and photographic images(PIM) acquired by digital cameras.By discrete wavelet transform(DWT),histogram calculating,discrete Fourier transform(DFT),statistical feature extraction and combination with a sine-filtering feature,the identifying accuracy rate about CG and PIM is improved.This provides credible supports for some relative domains such as image forensics and digita...