Abstract: A device may include an electronic display to display an image frame based on first and second color component input image data. The electronic display may include a first illuminator to generate a first light at a first brightness level, a second illuminator to generate a second light of a different color at a second brightness level, a first set of pixel locations to emit the first light based on a first set of pixel values, and a second set of pixel locations to emit the second light based on a second set of pixel values. The electronic device may also include pixel contrast control circuitry that determines the first brightness level and the first set of pixel values based on the first color component input image data and determines the second brightness level and the second set of pixel values based on the second color component input image data.

Abstract: A device may include an electronic display having a backlight that generates light and multiple display pixels that modulate the amount of generated light emitted from the electronic display based on compensated image data. The backlight may include multiple illuminators that generate the light, and a first color component illuminator may have a slower response rate than a second color component illuminator. The device may also include image processing circuitry that generates the compensated image data by compensating input image data for a color shift associated with a change in brightness of the backlight and the slower response rate of the first color component illuminator. The input image data may be compensated by increasing first color component pixel values of the input image data relative to second color component pixel values of the input image data, and the compensated image data may be output to the electronic display.

Abstract: Systems and methods are described herein to control brightness based on image content or other inputs to a display system. A dual-control system may integrate both slow control operations and fast control operations into a cohesive brightness management system. By using both shorter-term (e.g., fast control) and longer-term (e.g., slow control) brightness adjustment operations, the electronic device may quickly respond to high luminance and high brightness situations that may cause burn-in into the display, image artifacts, or other damage. Responding quickly to these high consumption situations may prevent damage or perceivable upset to an ongoing process, among other benefits.

Abstract: This disclosure is directed towards tone mapping systems and methods that preserve contrast of fine features of an image and avoid brightening monotonic regions of the image. To preserve contrast and avoiding brightening of the monotonic regions, an image processing circuitry may include hardware that enables determining pixel statistics of an image, generating a tone mapping that is configured to adjust the color values of pixels in the image, and applying the tone mapping to at least the low frequency component of the image to produce an output image where the contrast of the fine details is preserved. In addition, the image processing circuitry may include hardware that enables adjusting the tone mapping based on variance bins in a histogram of pixel values and applying the adjusted tone mapping to produce an output image where the monotonic regions are not brightened.

Abstract: A method comprising obtaining image data representative of pixel intensities associated with an image. Irrespective of a respective magnitude of the pixel intensities, the image data is processed with a logarithmic transformation to transform the pixel intensities to transformed pixel intensities, thereby generating transformed image data representative of the transformed pixel intensities. The logarithmic transformation, L(x), is representable as: L(x)=P logM(f(x))+N where x represents a pixel intensity to be transformed, f(x) represents a function of x and P, M and N represent constants.

Abstract: An image processor comprising an input module for receiving image data from an image sensor; an image processing module arranged to perform one or more operations on at least a portion of the image data to generate processed image data; and a characteristic processing module arranged to perform one or more characteristic processing operations on at least a portion of the characteristic data to generate processed characteristic data. The portion of the characteristic data is associated with the portion of the image data; the one or more characteristic processing operations are associated with the one or more image processing operations. The image processor further comprises an output module for outputting the processed image data and processed characteristic data.

Abstract: A device may include an electronic display having a backlight that generates light and multiple display pixels that modulate the amount of generated light emitted from the electronic display based on compensated image data. The backlight may include multiple illuminators that generate the light, and a first color component illuminator may have a slower response rate than a second color component illuminator. The device may also include image processing circuitry that generates the compensated image data by compensating input image data for a color shift associated with a change in brightness of the backlight and the slower response rate of the first color component illuminator. The input image data may be compensated by increasing first color component pixel values of the input image data relative to second color component pixel values of the input image data, and the compensated image data may be output to the electronic display.

Abstract: An image signal processor, comprising an input module for obtaining input data from a camera, whereby the camera is arranged to capture a representation of a real-world environment. The image signal processor further comprises at least one adjustment module for compressing the input data and producing compressed input data, and a localization and mapping module arranged to generate one or more data points from the compressed input data. The image signal processor also comprises an output module for outputting at least the one or more data points.

Abstract: Methods and systems include determining an upper boundary of brightness values of high-dynamic range image content. Using the determined upper boundary, end points of bins of histogram values are determined. Using the determined end points of the bins of histogram values, luma values are allocated to the bins. The high-dynamic range image content is processed based at least in part on the allocations to the bins. Image data including the processed high-dynamic range image content is displayed via an electronic display.

Abstract: The present disclosure provides an image processing apparatus and system which downscales an image which is generated from data provided by a sensor. The downscaled image is then analyzed to determine the location of one or more regions of interest in the image. The regions of interest can then be cropped from the original image and those cropped regions of interest processed by a computer vision engine.

Abstract: A method including streaming input image data representing an input frame of a video into temporary storage. Transformation data representing at least one transformation for application to the input image data is obtained. Ordering data indicating a variable order in which portions of output image data are to be generated is obtained, the ordering data being based on at least one characteristic of the input frame. The transformation data is used to identify portions of input image data to be processed to generate corresponding portions of output image data. The identified portions of input image data are processed to generate the corresponding portions of output image data in the order indicated by the ordering data.

Abstract: An electronic device may include an electronic display to display an image based on scaled image data and variable scaling circuitry to generate the scaled image data. Generating the scaled image data may include receiving input pixel values in a first resolution and determining multiple tap point locations based on a scaling ratio to be applied to the input pixel values. Generating the scaled image data may also include determining weighting coefficients based on a scaling curve and the tap point locations, and weighting the input pixel values based on the weighting coefficients. The variable scaling circuitry may generate the scaled image data at a second resolution based on the aggregation of the weighted input pixel values.

Abstract: Examples of the present disclosure relate to a method for reducing artefacts caused by the presence of flicker during capture of a video. A sequence of frames of the video are captured, the frames each comprising a plurality of predefined regions each comprising a plurality of pixels. A time-varying oscillation of the flicker is characterized based on variations, across the sequence of frames, of data relating to pixel intensities in at least one said region. Based on the characterizing of the time-varying oscillation of the flicker, a flicker correction is applied to a frame of the video.

Abstract: An image signal processor, comprising an input module for obtaining input data from a camera, whereby the camera is arranged to capture a representation of a real-world environment. The image signal processor further comprises at least one adjustment module for compressing the input data and producing compressed input data, and a localization and mapping module arranged to generate one or more data points from the compressed input data. The image signal processor also comprises an output module for outputting at least the one or more data points.

Abstract: A method comprising obtaining image data representative of pixel intensities associated with an image. Irrespective of a respective magnitude of the pixel intensities, the image data is processed with a logarithmic transformation to transform the pixel intensities to transformed pixel intensities, thereby generating transformed image data representative of the transformed pixel intensities. The logarithmic transformation, L(x), is representable as: L(x)=P logM(f(x))+N where x represents a pixel intensity to be transformed, f(x) represents a function of x and P, M and N represent constants.

Abstract: A method including streaming input image data representing an input frame of a video into temporary storage. Transformation data representing at least one transformation for application to the input image data is obtained. Ordering data indicating a variable order in which portions of output image data are to be generated is obtained, the ordering data being based on at least one characteristic of the input frame. The transformation data is used to identify portions of input image data to be processed to generate corresponding portions of output image data. The identified portions of input image data are processed to generate the corresponding portions of output image data in the order indicated by the ordering data.

Abstract: Examples of the present disclosure relate to an image processing apparatus comprising a filter to convert a first image data signal into an output image data signal. The filter is configured to resample the first image data signal, having a first sample rate, by a resampling factor, such that the output image data signal has an output sample rate that is different to the first sample rate. The filter is also configured to apply a phase alteration to the first image data signal to compensate a group delay in the first image data signal.

Abstract: A method of calibrating image data, the method comprising the steps of obtaining the image data and applying a shading correction mesh to the image data, wherein the shading correction mesh comprises a plurality of nodes, and is used to generate shading correction values for each pixel location in the image data. The blocks of the generated shading correction values are then grouped each group of blocks comprising a plurality of blocks, and each block comprising a plurality of pixel locations. An analysis of each of the groups of blocks of generated shading correction values is performed, and an updated shading correction mesh based on the analysis of the groups of one or more blocks is generated.

Abstract: A method of determining an exposure ratio for use with a multi-exposure image capture system operable to capture a first image of a scene with a first exposure and a second image of the scene with a second exposure shorter than the first exposure. The exposure ratio is a ratio of the first exposure to the second exposure. The method comprises obtaining image data representative of an image captured using an image sensor of the image capture system and setting the exposure ratio in dependence on a distribution of counts relating to values of a characteristic of respective pixels of the image and a weighting function which varies with the values of the characteristic.

Abstract: An image processor comprising an input module for receiving image data from an image sensor; an image processing module arranged to perform one or more operations on at least a portion of the image data to generate processed image data; and a characteristic processing module arranged to perform one or more characteristic processing operations on at least a portion of the characteristic data to generate processed characteristic data. The portion of the characteristic data is associated with the portion of the image data; the one or more characteristic processing operations are associated with the one or more image processing operations. The image processor further comprises an output module for outputting the processed image data and processed characteristic data.