The Characteristics of Ghost Mechanism in a Non-Magnetic Single Component Process Depends on a Diameter of the Toner Particle

Takaya, Toshihiko; Iwamatsu, Tadashi; Azuma, N.

doi:10.2352/issn.2169-4451.1998.14.1.art00022_2

Cited by 4 publications

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Characterization of Ghosting Defects in Electrophotographic Printers

Eid

Cooper

Ahmed

2007

2007 IEEE International Conference on Image Processing

View full text Add to dashboard Cite

Ghosting is a common print defect in electrophotographic printing. Printers experiencing ghosting defects show repeated images (residual images) of previously printed contents in the paper process direction. Detecting the residual image (ghost) location and contrast provides necessary information about the ghosting source and severity. In this paper, we present a new system for detecting and quantifying the ghosting defect. It includes a design for a printed test pattern to emphasize the ghosting defect and facilitate further processing and analysis. Wavelet filtering and a template matching technique are used to detect the ghost location along and across the scanned test pattern. A new metric is developed to quantify ghosting based on its contrast, shape, and location consistency. Experimental results on 31 samples of various types of ghosting showed 0.95 correlation between the proposed method's ranking and experts' visual ranking.

show abstract

Characterization of Ghosting Defects in Electrophotographic Printers

Eid

Cooper

Ahmed

2007

2007 IEEE International Conference on Image Processing

View full text Add to dashboard Cite

show abstract

Characterization of Electrophotographic Print Artifacts: Banding, Jitter, and Ghosting

Eid

Ahmed

Cooper

et al. 2011

IEEE Trans. on Image Process.

View full text Add to dashboard Cite

Electrophotographic (EP) print banding, jitter, and ghosting artifacts are common sources of print quality degradation. Traditionally, the characterization of banding and jitter artifacts relies mainly on the assumption that the defect has either a horizontal or vertical orientation which permits the simple 1-D analysis of the defect profile. However, this assumption can easily be violated if a small amount of printer or scanner skew is introduced to the analyzed images. In some cases, the defect can inherently be neither vertical nor horizontal. In this case, unless the defect orientation has been accurately detected before analysis, the 1-D-based approaches could bias the estimation of the defect severity. In this paper, we present an approach to characterize the jitter and banding artifacts of unrestricted orientation using wavelet filtering and 2-D spectral analysis. We also present a new system for detecting and quantifying ghosting defects. It includes a design for a printed test pattern to emphasize the ghosting defect and facilitate further processing and analysis. Wavelet filtering and a template matching technique are used to detect the ghost location along and across the scanned test pattern. A new metric is developed to quantify ghosting based upon its contrast, shape, and location consistency. Our experimental results show that the proposed approaches provide objective measures that quantify EP defects with a rank ordering correlation coefficient of 0.8 to 0.98, as compared to the subjective assessment of print quality experts.

show abstract