Abstract: This invention relates to a method, a computer program, a computer program product and a device for reducing motion blur of images shown on non-stroboscopic display devices, in which local areas p, of an image of a video signal are displayed during respective local display times t; that are less than or equal to a image period T, comprising determining (40) an amount X; of high spatial frequency content related to a local area p, of said image of said video signal, and adjusting (41) a local display time t, in dependence on said determined amount X; of high spatial frequency content, wherein said local display time t; is decreased with increasing determined amount X; of high spatial frequency content.

Abstract: A driver (DD, SD, PD1, PS1, PD2, PS2) supplies, at a frame rate, a first current (I1) with a first duty cycle being smaller than one to a first light emitting element (PL1) of an active matrix display (AMD) and a second current (I2) to a second light emitting element (PL2) of the active matrix display (AMD). The second light emitting element (PL2) has a shorter lifetime than the first light emitting element (PL1). The driver (DD, SD, PD1, PS1, PD2, PS2) limits controls the second duty cycle to be larger than the first duty cycle.

Abstract: The novel method of electronic color image processing comprises: inputting an image; obtaining a color (A) based on colors present in at least a first part of the image; and changing a saturation correlate (S2) defined with respect to the color (A) for at least a second part of the image. This allows for better quality saturation modification on a larger number of possible input images.

Abstract: An image conversion unit (100) for converting an input image with an input frequency spectrum into an output image with an output frequency spectrum, the output frequency spectrum having more relatively high frequency components than the input frequency spectrum is disclosed. The image conversion unit comprises: means for providing (102) an intermediate image on basis of the input image; and combining means (104) for combining a high frequency signal with the intermediate image into the output image by means of error diffusion.

Abstract: A method for processing color image data that enables to optimally render a color image on a target device. The method incorporates a color gamut mapping step, where the amount of gamut mapping is adapted dynamically, in dependence of at least a color saturation value of the input pixel. Preferably, also a luminance value of the input pixel is used. The adaptive gamut mapping incorporates correction of saturation, and preferably also hue and white point, of the image data. The color gamut of the target device is used to the fullest possible extent, while clipping and loss of local details in highly saturated areas of the input image is largely prevented.

Abstract: The invention relates to a color display device for display a color image and a method of operating such display. The color display device is provided with a plurality of picture elements, two selectable light sources having different predetermined radiance spectra, color selection means which in combination with the selectable light sources is able to produce respective first and second primary colors on the display panel and control means arranged to select alternately one of the selectable light sources and to provide a portion of the picture elements with image information corresponding to the respective primary colors obtainable with the selected light source. The primary colors of the display device can be selected in a time sequential and space sequential way which enable a reduction of a color break-up.

Abstract: An apparatus and method for primary color correction and clipping is provided that is particularly suited for application in mobile displays. It is a combination of a brightness reduction, and a ‘smart’ clipping algorithm and is based on the perceptual attribute “colorfulness”, in which images that are brighter seem to posses more color. In the smart clipping algorithm, a brightness reduction is followed by a gamut (primary) correction and then a smart clip is performed by “adding white” to the out-of-gamut pixels only. This reduces the saturation while it increases the brightness. That is, the saturation is decreased in favor of increased brightness, which gives similar colorfulness on a mobile display as on an EBU display. This smart clipping affects those colors that cannot be represented on the display.

Abstract: An edge enhancement unit (100) for calculating a sharpened edge for an original edge in an image on basis of the properties of the original edge. The original edge is represented by a transient (112) in a signal representing values of pixels of the image. The edge enhancement unit (100) comprises: an edge determining unit (104) for determining properties of the transient (112) on basis of values of a first number of pixels around the original edge; and a filter unit (102) for calculating the sharpened edge on basis of values of a second number of pixels around the original edge and the properties of the transient (112).

Abstract: An image processing apparatus (100) comprises: receiving means for receiving a video signal representing input images; a film-detector unit (108) for detecting whether the input images have been captured by a film camera or by a video camera; and a sharpness enhancement unit (106) for calculating sharpness enhanced images on basis of the input images. The sharpness enhancement unit (106) is controlled by the film-detector unit (108), whereby the sharpness enhancement is larger if the film-detector unit (108) has detected that the input images have been captured by the film camera than if the film-detector unit (108) has detected that the input images have been captured by the video camera.

Abstract: A color picture display device having a shadow mask is provided comprising a cathode ray tube (CRT) having a gun (1) for generating at least two electron beams mutually different colors and a display screen (2). The screen has phosphor deposits for emitting light of different colors. The device has a deflection system (3) for scanning the electron beams across the display screen (2) in a pattern of successive, substantially parallel lines, each line being scanned in a scanning direction. The device further comprises means for diverging the landing points on the screen for at least one of the beams with respect to one of the other beams in a direction other than the scanning direction, and means for interpolation of color video data, used to control the beam intensity, in order to reduce shift errors due to the diverged beams. Further, a method for operation of such a color picture display device is disclosed.

Abstract: This invention relates to a method for improving the perceived resolution of a colour matrix display with at least one pixel, comprising the steps of subdividing an incident colour channel signal (R) to said pixel into a first and second signal component (R1, R2), applying a gain factor (CR) to one of said signal components (R1, R2), and-subsequently recombining said first and second signal components (R1, R2) into an exiting, modified colour channel signal (R?).

Abstract: The invention relates to a method and a circuit arrangement to reduce motion blur of images shown in non-stroboscopic display devices, in particular Liquid Crystal Display Panels (LCDs). Thin Film Transistor Displays (TFTs), Colour Sequential Displays. Plasma Display Panels (PDPs), Digital Micro Mirror Devices or Organic Light-Emitting Diode (OLED) displays, in which motion vectors depending on moving components in each image of an input video, signal are calculated, in which anti-motion blur filtering of the input video signal is performed based on the calculated motion vectors to produce an output video signal, and in which images are generated on said display device depending on said output video signal. In order to provide an improved spatial filtering with less noise enhancement and less noise modulation, it is proposed that edge characteristics in each image of the input video signal are determined and that anti-motion blur filtering is further based on said determined edge characteristics.

Abstract: A method for masking faulty sub-pixels in a display having a plurality of pixels formed of a number of sub-pixels, wherein at least one pixel in said display is faulty and comprises at least one sub-pixel having a defect. The method comprises obtaining (S2) a set (15) of sub-pixel values (2, 3, 4) for generating desired perceptive characteristics for said pixel and determining (S3) a modified set (16) of sub-pixel values (2?, 3?, 4?) for generating modified perceptive characteristics for said pixel. This modified set of sub-pixel values is based on information (14) regarding the sub-pixel defect so as to be implementable in the display, and has values chosen to reduce an error perceived by a user. The modified values are then implemented (S4) in the display. The display is preferably of the kind where each pixel comprises a set of primary sub-pixels each emitting a primary color and at least one additional, redundant sub-pixel for emitting an additional color, such as a RGBW display.

Abstract: Method display device and computer program product that reduces motion blur, flicker and loss of brightness of images shown in non-stoboscopic display devices, such as Liquid Crystal or Light Emitting Diodes displays, in which each image of input video signal is displayed during a display time ti, which is less than or equal to a picture period T. The motion and the characteristics of motion are measured and the display time ti is continuously adjusted between O and T depending on this measured motion and the caracteristics of motion. To further reduce flicker and loss of brightness encountered when reducing the display time, anti-mot on blur filtering of the input video signal is performed, where the display time and the amount and sort of filtering is jointly controlled based on the measured motion and characteristics of motion.