Examples of systems and methods for enhancing image quality for documents with highlighted portions are described. A highlighted portion from a received input is detected. The highlighted portion is automatically segmented as a text layer and the remaining portion is further segmented as a separate text layer and an image layer. A resolution is assigned to the highlighted portion, wherein the resolution assigned to the highlighted portion is greater than the respective resolution for the text layer and the image layer, to improve quality of the highlighted portion. The text layer corresponding to the highlighted portion and the separate text layer and the image layer are integrated together to generate a scanned document in a Mixed Raster Content (MRC) file format.

An image acquisition apparatus, an image forming apparatus, and a control method of the same are provided. An image acquisition apparatus includes an image sensor in which a red element outputting a signal corresponding to a red light, a green element outputting a signal corresponding to a green light, and a blue element outputting a signal corresponding to a blue light are arranged in a predetermined pattern, a driving unit configured to move the image sensor to a plurality of positions; and an image processor configured to receive a signal output from the red element, the green element and the blue element in the plurality of positions, respectively, and configured to acquire an image of an object by combining the received signal.

An image forming apparatus includes a scanner configured to read an image of a document and generate image data of the image according to a reading mode, a storage device configured to store the image data and the reading mode used when reading the image of the document, and a processor. The processor generates a combined image that includes the image of the document and a reading direction image that indicates a reading direction of the scanner and has a shape indicating the reading mode, and store data of the combined image in the storage device. The processor determines a position of the reading direction image in the combined image and a size of the reading direction image in the combined image, based on a reading resolution of the scanner and a resolution of the image data stored in the storage device.

An image sensor may include a pixel array having an NM array of merged pixels arranged in a Bayer pattern, each merged pixel including an k*l matrix of unit pixels of a same color, where k and l are integers greater than two; and an image signal processor to process signals output by the pixel array in accordance with a normal mode or a zoom-in mode. In the zoom-in mode, signals from the pixel array may be remosaiced such that signals corresponding to the unit pixels are arranged in a p*q matrix of unit pixels of a same color, wherein p is a non-negative integer that is less than k and q is a non-negative integer less than 1, the p*q matrixes being arranged in a Bayer pattern.

Systems, methods, and non-transitory computer readable media can provide a vibrating source configured to cause movement of a camera sensor to generate a bias for the camera sensor. A high frequency accelerometer configured to measure movement of the camera sensor can be provided. A plurality of images of a scene can be captured using the camera sensor based on the generated bias at a resolution supported by the camera sensor, wherein the high frequency accelerometer measures movement of the camera sensor during the capture of the plurality of images.

Examples of systems and methods for enhancing image quality for documents with highlighted portions are described. A highlighted portion from a received input is detected. The highlighted portion is automatically segmented as a text layer and the remaining portion is further segmented as a separate text layer and an image layer. A resolution is assigned to the highlighted portion, wherein the resolution assigned to the highlighted portion is greater than the respective resolution for the text layer and the image layer, to improve quality of the highlighted portion. The text layer corresponding to the highlighted portion and the separate text layer and the image layer are integrated together to generate a scanned document in a Mixed Raster Content (MRC) file format.

Examples include computing devices, processes, and/or machine-readable storage mediums. Examples analyze a region of pixels for a digital image to determine a set of diagonal direction pixel differences corresponding to a target pixel. Examples analyze the region of pixels to determine diagonal variances corresponding to the target pixel. Examples scale the digital image by processing the target pixel into a set of subpixels based at least in part on the set of diagonal direction pixel differences and the diagonal variances.

Examples include acquisition of an input image, generation of a first output pixel and a second output pixel based on a first set and a second set of input pixels, selective reassigning of a gray value of at least one of the first and second output pixels, and generation of an output image based on the output pixels at a second resolution lower than the first resolution.

Image quality degradation of an output image can be reduced. A control unit includes a correction intensity determination unit that determines a first magnification for reducing a reduction region including a subject and a second magnification for enlarging an enlargement region and an image correction unit that corrects an input image by using the first magnification and the second magnification. The correction intensity determination unit determines the first magnification based on the second magnification and the widths of a first region and a second region in the input image.

A read circuit outputs input pixel blocks to a line buffer. An arithmetic processing circuit reads an input pixel block from the line buffer and executes rotation processing to derive an output pixel block. A controller sets an output block height to the largest integer fraction of an output band height so that the output pixel block fits within an input band in an input pixel coordinate system, extends the width of the output pixel block so that the output pixel block fits within a maximum width of the input pixel block in the input pixel coordinate system, reduces the width of the output pixel block according to the size of the output pixel block in the input pixel coordinate system and the number of pixel lines in the line buffer, and sets the size of the input pixel block based on the size of the output pixel block.