Figure 6From: Detection of shifted double JPEG compression by an adaptive DCT coefficient model s h m , n SD f Distributions in - q m , n 2 , q m , n 2 . s h m , n SD f Distributions in - q m , n 2 , q m , n 2 with q m , n / 2 3 σ m , n SJR = (a) 4/3 (p = 0), (b) 0.5 (p = 1), and (c) 1/3 (p = 2). In (b and c), the light curve on the top denotes s h m , n SD f and the dark ones represent the Gaussian component mixtures in - q m , n 2 , q m , n 2 . Note that σ m , n SJR is normalized to 1 for convenience.Back to article page