Compared with other well-established methods, our method shows a significant performance in terms of dynamic range compression, while enhancing the details and avoiding the common artifacts, such as halo, gradient reversal, hazy or saturation.
Our technique fusing PCA and DCT enables our framework to: (1) perform balanced compression across all dimensions, (2) control and avoid compression errors and data corruption; and (3) allow more random access to any frame in the data – only a window of frames compressed together is accessed instead of fully decompressing the whole data file.
Chum et al. 2012 applied the theory of Doppler sounding, originally developed for observation of ionospheric response to magneto-hydrodynamic waves [e.g., Sutcliffe and Poole 1989], and introduced a formula that takes into account the effect of compression on Doppler shift and avoids the necessity of integration in general expression for Doppler shift.
If the bony interforaminal channel of a vertebral artery is breached, without acute disruption of the artery wall, IOUS could help the surgeon to identify the breach and avoid compression of the artery by screw implants.
Therefore, the design must be configured so that it can support forces of tension, compression and bending while avoiding problems of biocompatibility.
However, standardised conditions for the raw data acquisition (maximal exertion of compression and care in avoiding the dislocation of the cervix) can optimise the TDI-based TS measurements to enhance feasibility and reliability.
In dual-energy CEDM, contrast is injected without breast compression, thus avoiding patient motion linked to the heat sensation caused by the arrival of contrast agent and minimizing the impact of compression on contrast agent uptake in the breast.
Goudeseune also has some tips about how best to process the images, by removing duplicate frames, by tackling blockiness caused by the jpeg compression algorithm and by avoiding moire patterns caused by repeating patterns.
It has superior performance to the other HFCs in low-temperature applications and also exhibits low compressor discharge temperatures, which makes it suitable for single stage compression avoiding the need for interstage cooling.
Fat compression was avoided.
