Blur Problem Research Articles

Improvement in Outcoupling Efficiency and Image Blur of Organic Light-Emitting Diodes by Using Imprinted Microlens Arrays

We demonstrated a new approach to fabricate microlens arrays attached to an organic light-emitting diode (OLED) to improve the outcoupling efficiency. Polydimethylsiloxane (PDMS) microlens arrays were fabricated by imprint lithography. Two kinds of photoresists were used to make a mold to imprint the microlens array. Using this simple and low-cost fabrication process, a maximum of 43% luminance enhancement was acquired with the green OLED. When attaching the microlens array to a green OLED, the efficacy and power efficiency were increased by 42% and 69% at 900 , respectively. The external quantum efficiency of the OLED with the microlens array was increased by 59% at 7.5 due to luminance enhancement at a large viewing angle without spectral change. Additionally, the image blur problem is quantitatively analyzed by defining “blur width.” The image blur problem induced by the microlens array is reduced by adopting the microlens array with lower height while the luminance enhancement by the microlens array remained.

Spatial variant motion deblurring of images

Image restoration requires correct estimation of point spread function from the degraded observation. When one point spread function acts on the whole image, estimation of the true image is easier. However, for spatial variant degradations, i.e., when number of point spread functions act on the image, it is very difficult to estimate the true image from the degraded observation. In this paper, we have addressed rotational motion blur problem which may be either circular or elliptical. Spatial variant degradation is converted to number of spatial invariant degradations and the principle of spatial variant restoration is applied. The restoration results indicate the efficiency of the proposed method.

Enhancement of LCD Motion Picture Quality Using the Motion Compensated Sharpening Mask Filter in MPEG Domain

We proposed a method for reducing LCD motion blur in MPEG domain and analyzing the cause of LCD motion blur. The problem of LCD motion blur is caused by slow response time of liquid crystal and hold-type displaying method of LCDs. The proposed method uses MPEG motion vectors and frequency coefficients of DCT blocks to improve the motion blurs. First, we interpreted the aperture and response time effect of LCD in frequency domain then, modeled sharpening mask filters for the compensation. We confirmed the reduction of motion blurs in LCDs by a motion image simulator.

33.4: Smooth‐Frame‐Insertion Method for Reducing Motion Blur on OLED Panel

AbstractAs a kind of hold‐type display, OLED panel also suffers from motion blur problem. A smooth frame insertion (SFI) method is proposed to reduce the motion blur on OLED panel. SFI method doubles frame rate by decomposing each original frame into a smooth frame and a compensation frame. The smooth frame is calculated by some low‐pass filter. By SFI, hold‐type display is converted to impulse‐like display and motion blur is reduced significantly without luminance lost and obvious flicker.

Motion-based motion deblurring

Motion blur due to camera motion can significantly degrade the quality of an image. Since the path of the camera motion can be arbitrary, deblurring of motion blurred images is a hard problem. Previous methods to deal with this problem have included blind restoration of motion blurred images, optical correction using stabilized lenses, and special cmos sensors that limit the exposure time in the presence of motion. In this paper, we exploit the fundamental trade off between spatial resolution and temporal resolution to construct a hybrid camera that can measure its own motion during image integration. The acquired motion information is used to compute a point spread function (psf) that represents the path of the camera during integration. This psf is then used to deblur the image. To verify the feasibility of hybrid imaging for motion deblurring, we have implemented a prototype hybrid camera. This prototype system was evaluated in different indoor and outdoor scenes using long exposures and complex camera motion paths. The results show that, with minimal resources, hybrid imaging outperforms previous approaches to the motion blur problem. We conclude with a brief discussion on how our ideas can be extended beyond the case of global camera motion to the case where individual objects in the scene move with different velocities.

Real-time scanning-slit in vivo confocal microscope based on bilateral scanning which solves the problem of specimen motion blur: Applications to ocular neuroimaging

The standard method to observe nerves in tissue is to use some agent such as silver or gold compounds which are localized in the nerve fibers and increase their contrast. These were the techniques developed by Camillo Golgi and Santiago Ramón y Cajal. Cajal’s work was published in a two-volume edition in French in 1909 with the title Histologie du Systéme Nerveux de l’ Homme et des Vertébrés. This work was republished in 1952-1955 as Histologie du Systéme Nerveux by L. Azoulay, Instituto Ramón y Cajal.Alternatively a fluorescent compound may be introduced near the cell bodies of the neurons and the compound diffuses along the lipid membranes of the nerve. Subsequent observations of the specimen in a fluorescent microscope provides the observer with a bright, high contrast image of the nerve and its branches and bifurcations.The standard instrument for the observation of the cornea is the slit-lamp. The slit-lamp was invented by Allvar Gullstrand. Gullstrand made major contributions to the theory of astigmatism and to the mechanism of accommodation of the eye.