Printer identification based on a printed document has many desirable forensic applications. In the electrophotographic process (EP) quasiperiodic banding artifacts can be used as an effective intrinsic signature. However, in text only document analysis, the absence of large midtone areas makes it difficult to capture suitable signals for banding detection. Frequency domain analysis based on th...

The needs for color printing is increasing to output color documents used for presentation data and the Internet. To meet these needs, high-speed electrophotographic color printers are becoming popular. Okidata has also commercialized electrophotographic color printers. This paper describes the hardware and software design technology of an electrophotographic color printer controller using a ta...

We propose single-step additive fabrication of graded-index optical elements by introducing the light exposure as additional dimension to three-dimensional (3D) laser writing, hence (3+1)D writing. use a commercial printer and photoresist realize proposed single step method that can be swiftly adopted for research engineering. After presenting characterization profiles via basic structures, we ...

<p>In this study, temperature effects of a low-level laser source were investigated in muscle phantom within 20-, 40-, 60- and 80-seconds time intervals. A meter device having 5-channel 10 kΩ NTC type thermistor sensors developed TÜBİTAK UME Medical Metrology Laboratory for these special measurements. The poured into container that was specially designed sensor placement printed 3D printe...

We present a new class of models for color printers. They form the basis for model-based techniques that exploit the characteristics of the printer and the human visual system to maximize the quality of the printed images. We present two model-based techniques, the modified error diffusion (MED) algorithm and the least-squares model-based (LSMB) algorithm. Both techniques are extensions of the ...

The release of the open source 3-D printer known as the RepRap (a self-Replicating Rapid prototyper) resulted in the potential for distributed manufacturing of products for significantly lower costs than conventional manufacturing. This development, coupled with open source-appropriate technology (OSAT), has enabled the opportunity for 3-D printers to be used for sustainable development. In thi...

Sampling modulation transfer function (MTF) as defined in Park et al. [Appl. Opt. 23, 2527-2582 (1984)] as an x and y sampling can be generalized for image data not along x and y directions. For a given sampling lattice (such as in a laser printer, a scene projector, or a focal-plane array), we construct a two-dimensional sampling MTF based on the distance between nearest samples in each direct...

In this paper, a full-color photovoltaic (PV) module, called the artist PV module, is developed by laser processes. A full-color image source is printed on the back of a protective glass using an inkjet printer, and a brightened grayscale mask is used to precisely define regions on the module where colors need to be revealed. Artist PV modules with 1.1 ˆ 1.4 m2 area have high a retaining power ...