Patent application number | Description | Published |
20080317374 | Method of modifying brightness of color pixels - An apparatus includes an extractor, a first subtractor, a second subtractor, a third subtractor, an offset generator and an adder. The extractor receives the color pixel and to provides a first, a second, and a third image value, wherein the first, the second, and the third image values are associated with the brightness of the color pixel. The first subtractor calculates a first offset between the first image value and a first expected image value. The second subtractor calculates a first difference between the first and the second image values. The third subtractor calculates a second difference between the first and the third image values. The offset generator defines a linear relation based on the first offset and the first image value, and generates a second and a third offset. The adder receives the second offset, the third offset, the second image value and the third image value to generate a second and a third expected image value. | 12-25-2008 |
20090046202 | DE-INTERLACE METHOD AND APPARATUS - A de-interlace method is performed by the following process. First, edge directions of pixels surrounding a target pixel to be interpolated in an interpolating line are received, and a search range selected from the edge directions of the surrounding pixels is determined by checking a consistency of the edge directions of the surrounding pixels. Sequentially, an edge direction of the target pixel is determined based on the search range, and a pixel value of the target pixel is generated based on the edge direction of the target pixel for interpolation. | 02-19-2009 |
20090051637 | DISPLAY DEVICES - A display device comprises a processor for receiving an image signal and generating a data signal and a luminance signal accordingly, a display panel comprising display cells, a data driver generating driving signals according to the data signal for driving the display cells, and a backlight module comprising light emitting elements, each light emitting element being arranged to correspond to each display cell respectively for emitting light to each display cell according to the luminance signal. | 02-26-2009 |
20090060377 | IMAGE PROCESSING METHODS AND IMAGE PROCESSING APPARATUSES UTILIZING THE SAME - An image processing method applied in an image processor for processing an image including first pixels each having a corresponding pixel value. The pixel values of first pixels are distributed within a first distribution range. Second pixels comprise a region and are obtained from first pixels when a difference between pixel values of adjacent second pixels is less than a predetermined value. Gained pixel values are obtained after applying a gain to the image. An amount of distortion is obtained by summing up weighted differences between a reference pixel value and gained pixel value of first pixels having gained pixel value not distributed within first distribution range. A weighting factor does not equal to 1 when first pixel is within the region, and equals to 1 when first pixel is outside the region. The gain is updated according to the distortion. Processed image is obtained by applying the updated gain. | 03-05-2009 |
20090070606 | Apparatus and method for dynamic backlight-control - An apparatus and a method for dynamic backlight-control in an electronic device are provided. The apparatus includes a battery power-level detection unit and a controlling unit. The battery power-level detection unit is used for detecting the power level of a battery in the electronic device. The controlling unit is coupled to a backlight unit of a display device in the electronic device and the battery power-level detection unit for adjusting the illumination of the backlight unit according to the power level of the battery and an image-content lightness of an image inputted into the display device. | 03-12-2009 |
20090079754 | DISPLAY PARAMETER ADJUSTING METHOD AND APPARATUS FOR SCENE CHANGE COMPENSATION - A method and an apparatus for adjusting a display parameter are provided. The method includes the steps of: (a) calculating a scene change value between a current frame and a previous frame; (b) setting a first weight according to the scene change value; (c) calculating an original parameter of the current frame; (d) providing a display parameter of the previous frame; (e) calculating a display parameter of the current frame according to the first weight, the original parameter, and the display parameter of the previous frame. | 03-26-2009 |
20090092327 | IMAGE PROCESSING METHODS AND IMAGE PROCESSING APPARATUS UTILIZING THE SAME - An image processing method applied in an image processor for processing an image including first pixels each having a pixel value, a first reference pixel value representing a mean value of the pixel values of the first pixels, the pixel values of the first pixels being distributed within a first distribution range bounded between a second reference pixel value and a third reference pixel value. Second pixels are selected from the first pixels. The pixel values of the second pixels are distributed within a second distribution range. The second distribution range of the second pixels is smaller than the first distribution range of the first pixels. A local characteristic of the image is obtained according to the second pixels. A parameter of the image is adjusted according to the local characteristic. | 04-09-2009 |
20090097747 | METHOD OF IMAGE PROCESSING AND DEVICE THEREOF - A method of image processing and a device thereof are provided in the present invention. First, an image having a plurality of regions is received, wherein each region comprises a plurality of pixels. A contrast process is performed on each region and a respective local curve of each region is analyzed, wherein the local curve is a corresponding relation between the gray-level values of the pixels in each region before and after the contrast process. Next, the gray-level value of one of the pixels in a boundary between one of the regions and the neighboring region is adjusted according to the respective local curves of the one of the regions and the neighboring region. The local contrast process towards to each region is performed for enhancing the image. Therefore, not only can the features be obvious, but the non-uniform area in the boundary between the regions also can be smoothed. | 04-16-2009 |
20090122000 | IMAGE PROCESSING METHOD OF BACKLIGHT ILLUMINATION CONTROL AND DEVICE USING THE SAME - An image processing method of backlight illumination control is provided herein. First, an image including a plurality of pixels is received, wherein a first function is a relation between a gray-level value of one of the pixels and a displaying illumination of a backlight. The first function is compared with a characteristic function to obtain the specific function, wherein the characteristic function is a relation between the gray-level value and a predetermined displaying illumination of the backlight, and the specific function is a relation between the gray-level value and a remapped gray-level value. The specific function is utilized to remap the gray-level -value so as to adjust the displaying illumination. Therefore, the present invention enhances the displaying illumination for better visual quality. | 05-14-2009 |
20090123068 | METHOD FOR ADAPTIVELY ADJUSTING IMAGE AND IMAGE PROCESSING APPARATUS USING THE SAME - A method for adaptively adjusting image and an image processing apparatus using the same are provided. The apparatus includes a statistics apparatus and an image adjustment apparatus. The statistics apparatus receives a plurality of pixels in an image to generate a gray-level distribution of the pixels and searches a specific gray-level according to the gray-level distribution, in which a specific percentage of pixels have gray-levels smaller than the specific gray-level. The image adjustment apparatus adjusts the image according to the specific gray-level. | 05-14-2009 |
20090136129 | IMAGE DISPLAY PANEL AND DRIVING METHOD THEREOF - The invention provides image display panels. The image display panel comprises a histogram generator, a tone slope generator, and an image transformer. The histogram generator receives an original image, counts the pixels of different gray levels to generate a histogram distribution of the original image, and compares the pixel counts at every gray level with a first threshold count to identify the peaks of the histogram distribution. The tone slope generator generates a tone slope based on the histogram distribution and peaks of the histogram distribution. The image transformer transforms the original image into a modified image based on the tone slope. | 05-28-2009 |
20100013871 | BACKLIGHT CONTROLLER, DISPLAY DEVICE USING THE SAME AND METHOD FOR CONTROLLING BACKLIGHT MODULE - A backlight controller, a display device using the same and a method for controlling a backlight module are provided. The backlight controller includes a temporal weighting module and a dimming controlling module. The temporal weighting module calculates a weight sum of a first backlight luminance provided in a current frame and a target backlight luminance to serve as an adjusted backlight luminance. The target backlight luminance is obtained according to an image content of the current frame. The dimming controlling module increases or decreases the adjusted backlight luminance by a step value according to the target backlight luminance and generates a second backlight luminance provided in a next frame. Therefore, a backlight luminance of the backlight module not only can be smoothly adjusted to the target backlight luminance at high speed for avoiding backlight flicker, but also can be adaptive to image content for saving electric power consumption. | 01-21-2010 |
20110096988 | IMAGE ENHANCEMENT METHOD AND APPARATUSES UTILIZING THE SAME - An image enhancement apparatus is provided. The image enhancement apparatus includes a global contrast curve generator, a local contrast curve generator and an image generator. The global contrast curve generator generates a global contrast curve for an input image according to a global histogram of the input image. The local contrast curve generator generates a local contrast curve for each image partition within the input image according to the global contrast curve and further a feature of the image partition. The image generator generates an output image by enhancing a contrast of each image partition according to the local contrast curve for the image partition and the input image, and merging the enhanced image partitions. | 04-28-2011 |
20110243473 | IMAGE ENHANCEMENT METHOD AND APPARATUSES UTILIZING THE SAME - An image enhancement apparatus is provided. The image enhancement apparatus includes a global tone mapping curve generator, a local tone mapping curve generator, a reference gamma voltage generator and an image generator. The global tone mapping curve generator generates a global tone mapping curve for an input image according to global characteristic(s) of the input image. The local tone mapping curve generator generates a local tone mapping curve for each image partition within the input image according to the global tone mapping curve and further a feature of the image partition. The reference gamma voltage generator generates a plurality of reference gamma voltages for each image partition according to the corresponding local tone mapping curve for the image partition. The image generator generates an output image according to the reference gamma voltages of the image partitions and the input image. | 10-06-2011 |