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Reference [24] proposed a method to solve the problem of motion compensation when pulses are inconsecutive.
Our results show significant respiratory motion compensation when compared to the motion average PET images, with slightly better contrast and SNR compared to an equivalent 4D PET image space elastic motion correction method.
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The top plot shows the changes in contrast recovery when motion compensation is fully performed (DUAL, as in dual-gated studies), or only ECG gating is performed (ECG, one cardiac gate blurred by the respiratory motion) or if ECG gating is performed starting from a dataset where the respiratory motion has been compensated (ECG+R, one cardiac gate, less noisy).
Camera motion compensation is taken into account when constructing the "residue frame".
When conventional motion compensation algorithms that are fit for a single target are applied to cooperative targets imaging, a well-focused image cannot be obtained due to the low correlation between adjacent returned signals.
Comparisons between superresolution and motion compensation-based techniques when using simulated data are presented in Section 4. Deep analyses of the obtained results in Section 4 let us derive important conclusions.
In this paper, when dealing with motion compensation issues, we employ the extended envelope correlation method [26] for range-bin alignment, the entropy minimization approach [28] for phase adjustment, and the uniform-rate technique [36] for rotational motion compensation.
Here, P(I) is a prior introduced to bias the solution towards the temporal candidate when there is good motion compensation between frames as measured by the DFD.
When running the two motion compensation algorithms for a data set that does not exhibit motion to begin with, then ICA-SP is a clear winner over QUASI-P as can be seen from the resulting validation measures given in Table 5.
Motion compensation algorithm in [7, 8] employs overlapped block motion compensation (OBMC) and in [9] utilizes adaptive overlapped block motion compensation (AOBMC) to alleviate block artifacts and have better visual quality than OBMC.
Let the distortion ratio (DR) to be defined as (27) which represents the ratio of motion compensation distortions of a block for the same candidate motion vector (mv) when the reference frame is encoded with two different QP values of QP1 and QP2.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com