Image motion compensation

Film advance sprocket and image motion compensation prism are mounted on a single shaft to improve precision of registration... 

To achieve a desired signal-to-noise ratio, it is often necessary to dwell at a particular scene and integrate the signal for a certain time, the exposure time. If within this time the apparent motion of the area under observation is appreciable, it may become necessary to adjust the pointing so that smear is minimized. This process is called image motion compensation. It can be implemented by rotating the whole spacecraft or by tilting a mirror inside an instrument. Both techniques are discussed. 

Fig. 5.4.13 A mirror mounted at 45° with respect to the rotating shaft permits radiation from a blackbody, deep space, and a planetary surface to be channeled in sequence towards the instrument. Slow rotation of the same mirror permits image motion compensation.

Fig. 1.16 Typical motion-compensated, velocity encoding imaging sequence. The basic scheme from Figure 1.11 is amended by additional compensating gradient pulses for the read, phase and slice directions. The velocity encoding pair of gradient pulses of duration 8 and separation A is drawn on a separate line in reality, it is applied along any of the three...

Section IX summarizes methods for the analysis of image sequences. Techniques for motion compensation, detection and tracking of moving objects, and recovery of scene structure from motion using optic flow and discrete features are discussed. 

At first the video streams acquired by the CCD camera are separated into sequence of images and then to remove motion debluring wiener filtering method [18] was used. Motion compensated four frames are shown in Fig. 3. 

C. Lin and S. Kwatra. An adaptive algorithm for motion compensated color image coding. IEEE Globecom, 1984. 

Xu S, Cleary K, Stoianovici D, Fichtinger G (2005) Registration and motion compensation CT-guided spinal of a needle placement robot for procedures. In Galloway RL, Cleary KR (eds) Medical Imaging 2005 Conference. SPIE-INT Society Optical Engineering, Bellingham, WA, USA, 1-2 661-669... 

In order to obtain images with a high contrast and to reduce the viewing-angle dependence, all STN displays need at least one retarder film which compensates the optical retardation of the switchable cell filled with a low-molecular-weight hquid-crystalline mixture. The conventional polymer retardation films used in these displays have a nearly constant optical retardation as a function of temperature. Its retardation value is usually adapted to the retardation of the STN cell at room temperature. However, the cell s retardation decreases with increasing temperature due to the thermal motion of the LC molecules in the cell. This leads to a mismatch between the retarder film... 

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