Abstract: A video processing apparatus that can be connected to a video playback apparatus includes an input unit configured to input video data from the video playback apparatus, an interpolation unit configured to generate interpolated frame image data of input video data, and an output unit configured to output the interpolated frame image data as interpolated video data, wherein the interpolation unit generates different interpolated frame image data according to a playback mode of the video playback apparatus.

Abstract: Gradation transform considering a scene transitional direction is executed for a video signal. The statistic of the luminance distribution of the input video signal is detected. The transitional direction of brightness of a scene of the input video signal is detected. A transform characteristic in transforming the gradation characteristic of the input video signal is set based on the detection results of the statistic and transitional direction.

Abstract: An image forming apparatus for executing gradation correction processing to input image data, comprises: adding means for adding any signal value in a range of predetermined lower limit and upper limit in every pixel, to each pixel value of input image data; measuring means for measuring gradation distribution divided in a plurality of distribution ranges on the basis of gradation values of a predetermined number of pixels to which the signal values are added by the adding means; and generating means for generating gradation correction data for correcting the input image data in each pixel of the predetermined number on the basis of the gradation distribution measured by the measuring means.

Abstract: To obtain an excellent edge enhancement effect even when dynamic ? correction processing is executed for an edge-enhanced image signal, and to obtain an excellent edge enhancement effect for various ?-characteristics. An edge component is detected from an input image signal. A ? correction curve is calculated based on characteristics of an image scene detected by a scene characteristic detector, and its data is stored in a dynamic ? correction RAM table and an inverse gradient RAM table. A gain controller multiplies the edge component by a control signal from the inverse gradient RAM table to generate an edge enhancement signal which is in turn added to the image signal to obtain an edge-enhanced signal. The inverse gradient RAM table sends an inverse number of a gradient of a ? correction curve corresponding to a signal level of the inputted image signal as the control signal to the gain controller.

Abstract: In order to improve a sense of contrast of an image signal without increasing the number of conversion conditions stored in advance, an image signal processing method of this invention includes steps of: dividing a range of possible values of input image signals into a plurality of regions, successively accumulating the number of image signals belonging to the respective regions among the image signals input during a predetermined period for the respective regions, and setting a successive accumulation result as an evaluation value; comparing the evaluation value with a predetermined value; selecting a conversion condition corresponding to a difference between the evaluation value and the predetermined value from among a plurality of conversion conditions stored in advance to correspond to one of the regions in which the evaluation value exceeds the predetermined value; and converting the image signals input under the selected conversion condition.