Abstract: This disclosure provides vehicle detection methods and systems including irrelevant search window elimination and/or window score degradation. According to one exemplary embodiment, provided is a method of detecting one or more parked vehicles in a video frame, wherein candidate search windows are limited to one or more predefined window shapes. According to another exemplary embodiment, the method includes degrading a classification score of a candidate search window based on aspect ratio, window overlap area and/or a global maximal classification.

Abstract: This disclosure provides vehicle detection methods and systems including irrelevant search window elimination and/or window score degradation. According to one exemplary embodiment, provided is a method of detecting one or more parked vehicles in a video frame, wherein candidate search windows are limited to one or more predefined window shapes. According to another exemplary embodiment, the method includes degrading a classification score of a candidate search window based on aspect ratio, window overlap area and/or a global maximal classification.

Abstract: What is disclosed is a novel system and method to control an imaging device. A first collection of a plurality of two-dimensional image points in a first vector space for a source image and a second collection of a plurality of two-dimensional image points in a second vector space for a target image are received. The first collection of two-dimensional image points and the second collection of two-dimensional image points are converted into a homogenous form to apply affine matrix transformations. A matrix transformation is solved to map the first collection of the plurality of two-dimensional image points to the second collection of the plurality of two-dimensional image points. The matrix transformation is used to adjust distortion of the target image in an imaging device.

Abstract: What is disclosed is a novel system and method for detecting and correcting for In-Line-Spectrophotometer (ILS) measurements of constant value patches in the presence of banding in multi-function document reproduction systems. The present system analyzes the ILS data stream to identify structured noise components due to banding. An FFT is performed on each L*a*b* component in the ILS stream for a single test page. The peak frequencies from the FFT of the L* a* and b* channels are compared. Common frequencies in all 3 channels indicate a banding component. Once the banding frequencies and the banding wavelength are known, the color patch target can be adjusted to ensure the color patches are synchronized to the banding wavelength. By running a series of synchronized patches and averaging results, structured noise can be eliminated. In such a manner, a reduction of banding effects on color calibration can be effectuated.

Abstract: A method for enabling near unity scaling of printer video data to provide compensation for paper shrinkage caused during duplex printing. To achieve high quality image output, near neighbor interpolation may be used at very high resolutions. However, the insertion of extra interpolated subpixels may cause an edge transition to be shifted away from its original subpixel location with respect to an applied anti-aliasing rendering screen thereby causing ragged edges. The method aligns the edge position and the anti-aliasing rendering screen by applying a cyclical rotation of the screen.

Abstract: A method of forming a multidimensional upsampled table, which includes a plurality of upsampled contents and a plurality of upsampled columns and a plurality of upsampled rows, includes reading a multidimensional unsampled table having a plurality of unsampled content values. The multidimensional unsampled table has a plurality of unsampled columns and a plurality of unsampled rows. The multidimensional unsampled table is monotonic in the plurality of unsampled columns and is monotonic in the plurality of unsampled rows. The method further includes performing a Piecewise Cubic Hermite Interpolating Polynomial (PCHIP) interpolation to upsample the multidimensional unsampled table and to create the multidimensional upsampled table, and storing the multidimensional upsampled table. The PCHIP interpolation is independent of an order of interpolation direction.

Abstract: What is disclosed is a novel system and method for detecting and correcting for In-Line-Spectrophotometer (ILS) measurements of constant value patches in the presence of banding in multi-function document reproduction systems. The present system analyzes the ILS data stream to identify structured noise components due to banding. An FFT is performed on each L*a*b* component in the ILS stream for a single test page. The peak frequencies from the FFT of the L* a* and b* channels are compared. Common frequencies in all 3 channels indicate a banding component. Once the banding frequencies and the banding wavelength are known, the color patch target can be adjusted to ensure the color patches are synchronized to the banding wavelength. By running a series of synchronized patches and averaging results, structured noise can be eliminated. In such a manner, a reduction of banding effects on color calibration can be effectuated.

Abstract: What is disclosed is a novel system and method to control an imaging device. A first collection of a plurality of two-dimensional image points in a first vector space for a source image and a second collection of a plurality of two-dimensional image points in a second vector space for a target image are received. The first collection of two-dimensional image points and the second collection of two-dimensional image points are converted into a homogenous form to apply affine matrix transformations. A matrix transformation is solved to map the first collection of the plurality of two-dimensional image points to the second collection of the plurality of two-dimensional image points. The matrix transformation is used to adjust distortion of the target image in an imaging device.

Abstract: Disclosed is an image output device color management system. The color management system includes a 2 dimensional principle component analysis (PCA) compensation method for reducing the number of measurement required for re-profiling a device, such as a printer.

Abstract: A method for enabling near unity scaling of printer video data to provide compensation for paper shrinkage caused during duplex printing. To achieve high quality image output, near neighbor interpolation may be used at very high resolutions. However, the insertion of extra interpolated subpixels may cause an edge transition to be shifted away from its original subpixel location with respect to an applied anti-aliasing rendering screen thereby causing ragged edges. The method aligns the edge position and the anti-aliasing rendering screen by applying a cyclical rotation of the screen.

Abstract: A method and system for optimal node placement of a color correction table first generate a high resolution color correction table. A low resolution color correction table is generated. Each node of the low resolution color correction table has a corresponding color correction value generated by interpolating the color correction values of the high resolution color correction table. A reconstructed color correction table is generated, and each of the nodes of the reconstructed color correction table has a corresponding color correction value generated by interpolating the color correction values of the low resolution color correction table using an interpolation method identical to an output device interpolation method. Differences between the color correction values of the reconstructed and the high resolution color correction table are quantified into a measure of error, and the node locations of the low resolution color correction table are adjusted, and the procedure is repeated.

Abstract: Apparatus are provided, including a macrouniformity compensation mechanism to modify data exchanges between device-independent image data and a one-dimensional imaging device, to compensate for a lack of macrouniformity caused by the one-dimensional imaging device. The macrouniformity compensation mechanism includes an input-output value converter to convert an input intensity value for a given pixel to a corresponding output intensity value. The output intensity value is determined as a function of the position of the given pixel in the cross-process direction of the image and the level of the input intensity value. The input-output value converter includes a number of stored conversion parameter sets corresponding to respective different positions in the cross-process direction of the pixel data. The number of stored conversion parameter sets is a fraction of the total number of pixel positions in the cross-process direction of the pixel data.

Abstract: Disclosed is an image output device color management system. The color management system includes a 2 dimensional principle component analysis (PCA) compensation method for reducing the number of measurement required for re-profiling a device, such as a printer.

Abstract: A method of forming a multidimensional upsampled table, which includes a plurality of upsampled contents and a plurality of upsampled columns and a plurality of upsampled rows, includes reading a multidimensional unsampled table having a plurality of unsampled content values. The multidimensional unsampled table has a plurality of unsampled columns and a plurality of unsampled rows. The multidimensional unsampled table is monotonic in the plurality of unsampled columns and is monotonic in the plurality of unsampled rows. The method further includes performing a Piecewise Cubic Hermite Interpolating Polynomial (PCHIP) interpolation to upsample the multidimensional unsampled table and to create the multidimensional upsampled table, and storing the multidimensional upsampled table. The PCHIP interpolation is independent of an order of interpolation direction.

Abstract: A method and system for optimal node placement of a color correction table first generate a high resolution color correction table. A low resolution color correction table is generated. Each node of the low resolution color correction table has a corresponding color correction value generated by interpolating the color correction values of the high resolution color correction table. A reconstructed color correction table is generated, and each of the nodes of the reconstructed color correction table has a corresponding color correction value generated by interpolating the color correction values of the low resolution color correction table using an interpolation method identical to an output device interpolation method. Differences between the color correction values of the reconstructed and the high resolution color correction table are quantified into a measure of error, and the node locations of the low resolution color correction table are adjusted, and the procedure is repeated.

Abstract: An image transfer apparatus for transferring an image on a sheet medium having a frame and a reader connected to the frame for reading the image on the sheet medium. The image moves relative to the reader in a process direction when the reader reads the image. A positioning system is connected to the frame for positioning the sheet medium at a predetermined skew angle relative to the process direction.

Abstract: A method and system for converting, transforming or translating an imaging element associated with a first resolution into a second imaging element associated with a second resolution are provided. The method and system provide for the selection of output imaging element pattern based on context information extracted from areas neighboring an area undergoing conversion when information extracted from the area undergoing conversion provides an insufficient basis from which to select an output imaging element pattern. Exemplary embodiments are directed toward preservation of area coverage and centroid placement. The method provides for consideration of characteristics of a marking engine in the output imagine element pattern selections process. In xerographic environments clustering can be maximized, thereby reducing xerographic stress. In inkjet environments output pattern selections can be directed toward decreased clustering.

Abstract: A parallel, non-iterative, memory efficient method of determining image skew. A document skew angle is determined from a fast scan second order moment data set and a slow scan second order moment data set. A slow scan second order moment data set can be generated by receiving a current scanline of image data, updating columns sums for a set of rotation angles using scanlines within a buffer comprising a band having a predetermined number B of scanlines, and updating the buffer with the current scanline.

Abstract: An image forming device includes a backing and is arranged for a media to be positioned against the backing. The backing includes an embedded backing pattern. The media is skewed with respect to the scanning, thus defining a media skew. The media and the backing are scanned to form a pixel pattern. For each pixel, an included pattern recognition algorithm determines when the pixel represents the backing. When the pixel represents the backing, it is replaced with a replacement backing symbol, otherwise it is replaced with a replacement media symbol. The pixel determining and symbol replacing process is continued for remaining pattern pixels to form a replacement symbol pattern comprised of the replacement backing symbols and the replacement media symbols. The media is then processed based on the replacement symbol pattern, the processing including detecting the media skew, registering the media, or both.

Abstract: A method and system for converting, transforming or translating an imaging element associated with a first resolution into a second imaging element associated with a second resolution are provided. The method and system provide for the selection of output imaging element pattern based on context information extracted from areas neighboring an area undergoing conversion when information extracted from the area undergoing conversion provides an insufficient basis from which to select an output imaging element pattern. Exemplary embodiments are directed toward preservation of area coverage and centroid placement. The method provides for consideration of characteristics of a marking engine in the output imagine element pattern selections process. In xerographic environments clustering can be maximized, thereby reducing xerographic stress. In inkjet environments output pattern selections can be directed toward decreased clustering.