Abstract: The present invention is directed to a digital image content-adaptive contrast improving method. The method includes forming a piecewise linear tone remapping function for a digital image according to the histogram thereof. The piecewise linear tone remapping function is formed by repeatedly performing a first and a second step. The first step determines a starting linear tone mapping function for a specific range of luminance values. The second step generates a new tone mapping function for the specific range of luminance values based on the starting linear tone mapping function and the histogram. An apparatus for implementing the method is also provided.

Abstract: A method and apparatus for processing an image, and an electronic device are provided. The method comprises: picking a maximum gray level from the gray levels in the sub-pixels of each image pixel in the image to obtain a luminance map which is consisted of the maximum gray levels of the image pixels; determining an image-content lightness of the image according to the luminance map; and adjusting the gray levels in the sub-pixels of the image pixels in the image according to the image-content lightness of the image.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A method for simultaneously capturing images of multiple areas is applied to an image processing device. The method includes scanning a document and obtaining a preview image of the document; providing N scan windows for selecting N to-be-scanned areas from the preview image, wherein N is an integer; setting N scan resolutions respectively for the N scan windows; scanning the document; and outputting N scan images corresponding to the N scan windows according to N frequencies of a timing signal corresponding to the N scan resolutions.

Abstract: An image output method includes the step of waking up a printing unit and enabling the printing unit to perform a warm-up process while starting a printing control program for the printing unit. Thus, the time of waiting for the printing unit to output image data after a user sends out the image data is shortened.

Abstract: A method of adjusting an image parameter and a scanning apparatus are provided. The method includes the steps of: scanning a standard picture and moving the standard picture by an actual distance; generating a pulse signal corresponding to the actual distance; getting a standard distance corresponding to the pulse signal; and comparing the actual distance with the standard distance and adjusting a default pulse frequency. When the actual distance is shorter than the standard distance, the default pulse frequency is increased. When the actual distance is longer than the standard distance, the default pulse frequency is decreased.

Abstract: An image capturing method used in an image capturing device is provided. In the image capturing method, a preview image of N documents is generated by scanning the N documents once, wherein N is a positive integer larger than 1. After that, a scan window having N areas is selected, and the N documents are scanned according to the sizes and the positions of the N areas of the scan window, and then N scanned images are generated once.

Abstract: A scanner includes an optical module, a driving device, a digital gain unit and a timer. The optical module includes a photo sensing device for reading N scan lines and outputs digital image data. The driving device drives the optical module and has a position detecting device for outputting a position feedback signal corresponding to a position of the optical module. The digital gain unit performs a digital gain process on the digital image data. The timer controls the digital gain process according to the position feedback signal. The method includes setting K to 1; driving the optical module to read a Kth scan line of the to-be-scanned document and outputting Kth image data; calculating Kth exposure time for the Kth scan line and performing a digital gain process on the Kth image data; and determining if K is smaller than N.

Abstract: A scanner includes a scan flatbed, an optical module, a driving source, and an exposure control unit. The scan flatbed is for carrying a to-be-scanned document. The optical module includes a photo sensing device, for reading N scan lines of the to-be-scanned document. The driving source, used for driving the optical module, includes an encoder for outputting a position signal corresponding to a position of the optical module. The exposure control unit, including a timer, controls exposure time for each scan line to be constant according to the position signal. The scan method includes driving the optical module to read the scan lines of the to-be-scanned document and output the corresponding position signal; and controlling the photo sensing device to read each scan line of the to-be-scanned document for a constant period of time according to the position signal.

Abstract: A scanner including a light source, an optical module, a driving device, and a control unit is provided. The light source emits a light beam to the to-be-scanned document. The optical module includes a photo sensing device for receiving the light beam reflected by the to-be-scanned document. The driving device includes a position detecting device, for detecting a position of the optical module relative to the to-be-scanned document, and outputting a position feedback signal accordingly. The control unit includes a light source controller and a timer. The scanning method includes the steps of setting the value of K to 1; moving the optical module to read the Kth scan line and adjusting the luminance of the light source to compensate exposure level of the (K+1)th scan line; and determining if K is smaller than N.

Abstract: A duplex scanner comprising a first scanning module, a second scanning module, a transmission mechanism, a power source and a control processing unit is provided. The first scanning module scans a front side of a to-be-scanned document and captures a front side image of the to-be-scanned document. The second scanning module scans a back side of the to-be-scanned document and captures a back side image of the to-be-scanned document. The transmission mechanism moves the to-be-scanned document relatively to the first scanning module and the second scanning module. The power source outputs at least a feedback signal while driving the transmission mechanism. The control processing unit receives a scan command and accordingly controls the power source to drive the transmission mechanism. The control processing unit receives the feedback signal and accordingly controls the first scanning module and the second scanning module to proceed duplex scan.