The present disclosure provides methods and systems for image correction. The method may include obtaining a first frame captured by an image acquisition device, a second frame captured by the image acquisition device prior to the first frame, and a correction coefficient of the first frame; determining, based on the first frame and the second frame, whether a gamma curve of the image acquisition device has been adjusted; in response to determining that the gamma curve of the image acquisition device has been adjusted, determining an adjustment coefficient of the correction coefficient based on the first frame and the second frame; and adjusting, based on the adjustment coefficient, the correction coefficient of the first frame.

In some implementations, a method of synchronizing a content generation and delivery architecture to reduce the latency associated with image passthrough. The method includes: determining a temporal offset associated with the content generation and delivery architecture to reduce a photon-to-photon latency across the content generation and delivery architecture; obtaining a first reference rate associated with a portion of the content generation and delivery architecture; generating, via synchronization circuitry, a synchronization signal for the content generation and delivery architecture based at least in part on the first reference rate; and operating the content generation and delivery architecture according to the synchronization signal and the temporal offset.

In some implementations, a method of synchronizing a content generation and delivery architecture to reduce the latency associated with image passthrough. The method includes: determining a temporal offset associated with the content generation and delivery architecture to reduce a photon-to-photon latency across the content generation and delivery architecture; obtaining a first reference rate associated with a portion of the content generation and delivery architecture; generating, via synchronization circuitry, a synchronization signal for the content generation and delivery architecture based at least in part on the first reference rate; and operating the content generation and delivery architecture according to the synchronization signal and the temporal offset.

An image processing apparatus comprising: an acquisition unit that acquires exposure information of an image signal; a setting unit that sets tone conversion characteristic based on the exposure information and visual characteristics; and a tone conversion unit that performs tone conversion on the image signal using the tone conversion characteristic. The visual characteristics is a minimum amount of luminance change that a human can recognize and that differ for different luminance, and the setting unit obtains for each luminance an intersection of a first function that indicates a ratio of an amount of luminance change per one code value difference of the image signal before the tone conversion is performed and a second function that indicates a ratio of a minimum amount of luminance change that a human can recognize, and sets the tone conversion characteristic based on the intersection.

The present invention provides a method and apparatus for generating a high dynamic range image (HDRI). After acquiring a first illuminance diagram, a base layer and detail layers are extracted from the first illuminance diagram, where the base layer contains low frequency information of the first illuminance diagram and the detail layers contain high frequency information of the first illuminance diagram. The dynamic range of the base layer is then compressed while dynamic ranges of the detail layers remain uncompressed. Further, a second illuminance diagram is generated from the first illuminance diagram by fusing the base layer with the compressed dynamic range and the detail layers, the second illuminance diagram is mapped onto a plurality of preset color channels; and the images on the plurality of preset color channels are fused into the HDRI. Therefore, the detail information in the original illuminance diagram can be preserved.

An image capture apparatus has an A/D converter that compares a pixel signal read out from a pixel having a photoelectric conversion element with a reference signal whose voltage changes over time, and obtains, as an A/D conversion result of the pixel signal, a digital value corresponding to a time required for a magnitude relationship between the pixel signal and the reference signal to change. The A/D converter determines a level of the pixel signal using a threshold value, makes a change rate of the voltage of the reference signal different depending on a determination result, and changes the threshold value according to a signal expansion amount of the pixel signal after A/D conversion.

[Object] To quickly and correctly reproduce an image intended by a photographer, a cinematographer, and the like on the occasion of post-production.

[Solving Means] The development apparatus includes: an imaging unit that performs shooting and generates RAW data; a first conversion unit that converts the generated RAW data into image data by interpolation; an acquisition unit that acquires an exposure index value corresponding to an illuminance of a shooting environment; a first correction unit that corrects a value of the image data based on the exposure index value; and an output unit that associates the RAW data and the acquired exposure index value with each other and outputs the associated RAW data and exposure index value.

An image processing apparatus operable to perform development processing by performing at least a tone conversion on RAW image data that is inputted image data, the image processing apparatus comprising: a setting unit configured to set a first tone conversion curve corresponding to a dynamic range of the image data; an adjusting unit configured to generate a second tone conversion curve by adjusting the first tone conversion curve so that luminance changes of a bright portion and a dark portion of the image data are visually equivalent; and a tone conversion unit configured to perform a tone conversion of the image data by using the second tone conversion curve.

An apparatus has first and second generation units which generate, from input image data, color component data for luminance output and color component for color difference output, first and second convertors which converts tones of each piece of the color component data for luminance output and for color difference output, a combining unit combining each piece of the color component data obtained by the first and second convertors to generate respective pieces of combined color component data; a separation unit respectively separating luminance data and color difference data from the combined color component data; and a correction unit correcting a tone of each of the luminance data and color difference data. The second convertor has a characteristic for outputting a non-negative value in a range, of negative infinity to a positive threshold set in advance.

An object of the present invention is to generate a high-dynamic-range image with fewer pseudo-contours. An apparatus of the present invention generates a high-dynamic-range image and includes a setting unit for setting an imaging condition for each region that constitutes an image. The apparatus includes a setting unit configured to set an exposure condition for the region and a correcting unit configured to correct the set exposure condition so that a difference between a maximum value and a minimum value out of the set exposure condition is small.