Abstract: A color temperature calibration method for calibrating the color temperature of a display device according to a set of target chromaticity coordinate values, includes: measuring colors displayed by a plurality of display cells of the display device to generate at least a set of measurement chromaticity coordinate values; and adjusting at least a first gain value of the display device according to the set of target chromaticity coordinate values and the set of measurement chromaticity coordinate values; where the first gain value corresponds to the color of a first color channel of the display device; and the first color channel is one of the red color channel, green color channel and blue color channel.

Abstract: A color adjustment method for adjusting color characteristics of a display device includes: respectively utilizing a plurality of sets of digital color channel values to drive the display device, each set of digital color channel values respectively corresponding to a plurality of color channels; and regarding at least a portion of the sets of digital color channel values: respectively utilizing a plurality of candidate Gamma characteristics to drive the display device, and measuring colors displayed by the display device to generate a plurality of sets of candidate chromaticity coordinate values corresponding to the candidate Gamma characteristics; and selecting a set of target chromaticity coordinate values according to the sets of candidate chromaticity coordinate values, and determining a Gamma characteristic corresponding to the set of digital color channel values according to a target Gamma characteristic corresponding to the set of target chromaticity coordinate values to adjust the color characteristi

Abstract: An image processing device includes: a peaking filter for performing peaking processing on an input image signal to generate a peaking image signal; a selection circuit, coupled to the peaking filter, for selecting a plurality of pixels within the peaking image signal; and a median filter, coupled to the selection circuit, for filtering the plurality of pixels within the peaking image signal to generate a filtered image signal.

Abstract: A method for enhancing image quality includes: performing a peaking operation on an image signal to generate a peaking signal; selecting a plurality of pixels from the peaking signal and the image signal; and deciding a luminance value for a target pixel of the image signal according to luminance values of the plurality of pixels.

Abstract: An image processing circuit for processing at least one jagged edge in an image represented by an input video signal. The image processing circuit includes: a detection module for detecting an edge by labeling a specific portion within input data carried by the input video signal to indicate whether the specific portion corresponds to a specific edge and further generates a detection result; a line buffer for temporarily storing input data carried by the input video signal; and a processing unit, coupled to the detection module and the line buffer, for processing the input data according to the detection result to output an output video signal.

Abstract: The present invention relates to a secured electronic document and method of validating the same. A security key is generated when the electronic document is generated and a printer driver is invoked to print out the encrypted document, and the security key is saved to a key manager over the network. When the secured electronic document or encrypted document is circulated to other persons or downstream processing units, the document recipients can request the security key from the key manager through the network link to check whether the encrypted document is the original copy. The security key may contain the document identification number, the serial number of the printer, the printer profile or printing status.