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In data extracting process, we extract bits of SH from the last raw of a stego image and get the pattern information of and from SH data.
Theoretical calculations and experiments showed that multistage counter current extracting process was superior to multistage cross current extracting process.
In the data extracting process, the pattern pairs and LUT templates are first extracted.
The extracting process is described as follows.
Figure 11 The flowchart of data extracting process.
All patterns of are replaced by in the extracting process to recover the original halftone image.
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As the embedding and the extracting processes are of low complexity and do not require any specific features of the input image, the extension to video watermarking will be straightforward.
For the optimization process, GA is applied in the watermark embedding and the watermark extracting processes to search for quantization steps The objective function of searching process is computed by using factors that relate to both imperceptibility and robustness of a watermark.
Next, a mesoporous silica shell was coated on the Fe3O4@nSiO2 core by a surfactant-templating sol-gel approach to form the core/shell-structured Fe3O4@nSiO2@mSiO2 particles, using the surfactant hexadecyltrimethylammonium bromide (CTAB) as a template, followed by the removal of CTAB by a solvent-extracting process.
A factorial fractional experimental design was developed to analyse the influence in the extraction process of five different extraction variables: ultrasound horn, temperature, extracting volume, cycle and amplitude of ultrasounds.
Figure 19(a) demonstrates a LabVIEW based user-interface for communicating and adaptive control with CNC control system, which is developed to enable extracting cutting process data, such as feedrate, constant surface speed, depth of cut, and spindle speed.
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CEO of Professional Science Editing for Scientists @ prosciediting.com