We report an intrinsic image distortion in microwave-induced thermoacoustic tomography. The distortion, due to microwave diffraction in the object to be imaged, leads to nonuniform excitation of acoustic pressure during microwave illumination. Both numerical simulations and phantom experiments demonstrate this phenomenon. A method of partial correction is also provided.

This paper introduces the concepts of “selfconsistency” and “universality” to evaluate high precision camera distortion models. Self-consistency is evaluated by the residual error when the distortion generated with a certain model is corrected by the best parameters for the same model (used in reverse way, which is common practice). Analogously, universality is measured by the residual error wh...

Video semantic segmentation is active in recent years benefited from the great progress of image segmentation. For such a task, per-frame generally unacceptable practice due to high computation cost. To tackle this issue, many works use flow-based feature propagation reuse features previous frames. However, optical flow estimation inevitably suffers inaccuracy and then causes propagated distort...

This paper presents that the opto-electrical characteristic of a typical CCD based digital camera is nonlinear. It means electric signal camera's detector - not linear function luminance value on lens. The feature needs to be transformed into if this used as distribution measurement device known Imaging Luminance Measurement Device (ILMD). article methodology for obtaining and focuses non- line...