CAJ | 학술논문

针对数字图像的真伪鉴别问题，通过在小波域上构造的滤波器，提取反映相机本身物理特性的某种特定噪声，将其作为判断图像真伪的关键特征。在待测图像中选取出可疑区域，将其噪声特征通过广义高斯分类器以及BP神经网络分类器进行判断和融合，从而实现图像的真伪鉴别。实验结果表明，该方法对多种不同伪造方式的数字图像均具有较高的识别正确率。
침대수자도상적진위감별문제，통과재소파역상구조적려파기，제취반영상궤본신물리특성적모충특정조성，장기작위판단도상진위적관건특정。재대측도상중선취출가의구역，장기조성특정통과엄의고사분류기이급BP신경망락분류기진행판단화융합，종이실현도상적진위감별。실험결과표명，해방법대다충불동위조방식적수자도상균구유교고적식별정학솔。
By applying the filter which is in the wavelet domain, a certain noise is extracted which can reflect the camera physical characteristic and it further serves as the key feature to detect the authenticity of digital image. The noise charac-teristics of suspicious region in the image are determined and aggregated by the generalized Gaussian classifier and BP neural network classifier, to detect forgeries in digital images. The experimental results show the approach provides a rela-tive high accuracy on detecting digital images that are forged in various ways.