Due to the significant advancements in image processing and machine learning algorithms,
it is much easier to create, edit, and produce high quality images. However, attackers can …

The rapid progress of sophisticated image editing tools has made it easier to manipulate
original face images and create fake media content by putting one's face to another. In …

Tampered digital multimedia content has been increasingly used in a wide set of
cyberattacks, challenging criminal investigations and law enforcement authorities. The …

Creating fake images such as replacing one's face with other person's face has become
much easier due to the advancement of sophisticated image editing tools. In addition …

Quantization plays a pivotal role in JPEG compression with respect to the tradeoff between
image fidelity and storage size, and the blind estimation of quantization parameters has …

The number of different JPEG coefficients between two successive JPEG compressed
images with the same quantization matrix will monotonically decrease in general. This …

Driven by the development of digital technology, manipulation towards digital images
becomes simpler than ever before in recent years. Many smartphone applications bring the …

Intrinsic statistical properties of natural uncompressed images are used in image forensics
for detecting the traces of previous processing operations. In this paper, we propose novel …

In recent years, image sharpening detection has become one of the main topics in the field
of image forensics. It is, however, still a challenge to detect the images sharpened with weak …

In image forensics, quantization step estimation plays a crucial role in revealing the JPEG
compression history. This study focuses on the estimation for images that have been JPEG …