Abstract: An image processing apparatus has an image analyzer including a feature detector, a feature combiner, and a resolution discrimination signal generator. For each pixel in a prescribed area of an input image, the feature detector outputs a representative difference value obtained from the pixel values of pixels positioned, with reference to that pixel, at prescribed intervals. The feature combiner outputs a combined feature value obtained from the representative difference values obtained for each pixel in the described area. The resolution discrimination signal generator outputs a resolution discrimination signal obtained from the combined feature value. The resolution discrimination signal has a monotonic non-decreasing relationship to the combined feature value. The resolution discrimination signal indicates an extent to which the input image includes signal components with frequencies equal to or greater than a particular frequency determined by the prescribed intervals.

Abstract: There are provided a first intermediate image generating means (1) for generating a first intermediate image (D1) by extracting a component in a vicinity of a particular frequency band in an input image (DIN), a second intermediate image generating means (2) for generating a second intermediate image (D2) from the first intermediate image (D1), and an adding means for adding the input image (DIN) and the second intermediate image (D2). The second intermediate image generating means (2) includes a non-linear processing means (2A) that varies the content of its processing according to the pixel in the intermediate image (D1). Even if the input image includes a fold-over component on the high-frequency side or does not include an adequate high-frequency component, adequate image enhancement processing can be carried out.

Abstract: A first intermediate image generating means (1) generates an intermediate image (D1) by extracting a component of an input image (DIN) in a particular frequency band; a second intermediate image generating means (2) generates an intermediate image (D2) having a frequency component higher than intermediate image (D1); an intermediate image processing means (3M) generates an intermediate image (D3M) by suppressing low-level noise included in intermediate image (D1); an intermediate image processing means (3H) generates an intermediate image (D3H) by suppressing low-level noise included in intermediate image (D2); and an adding means (4) adds the input image (DIN) and intermediate image (D3M) and intermediate image (D3H) together to obtain a final output image (DOUT). Even if the input image includes a fold-over component on the high-frequency side or does not include an adequate high-frequency component, an enhanced image can be obtained without enhancing noise.

Abstract: An intermediate image generating means (1) generates a horizontal intermediate image (D1h) and a vertical intermediate image (D1v) by extracting components of an input image (DIN) in a particular frequency band; an intermediate image processing means (2) generates a horizontal image (D2Bh) and a vertical image (D2Bv) by performing non-linear processing (2A) and high-frequency component generation (2B); an intermediate image (D2) is obtained by combining these horizontal and vertical images by performing weighted addition for each pixel and is added (3) to the input image (DIN) to obtain an enhanced output image (DOUT). Even if the input image includes a fold-over component on the high-frequency side or does not include an adequate high-frequency component, adequate image enhancement processing can be carried out.

Abstract: A first intermediate image generating means (1) generates an intermediate image (D1) by extracting a component of an input image DIN in a particular frequency band; a second intermediate image generating means (2) generates an intermediate image D2 having a frequency component higher than the intermediate image (D1); a first intermediate image processing means (3M) generates an intermediate image (D3M) by amplifying the pixel values in the intermediate image (D1); a second intermediate image processing means (3H) generates an intermediate image (D3H) by amplifying the pixel values in the intermediate image (D2); and an adding means (4) adds the input image (DIN) and the intermediate image (D3M) and the intermediate image (D3H) together to obtain an output image (DOUT). A first amplification factor (D3MA) and a second amplification factor (D3HA) are determined according to pixel values in the input image (DIN).

Abstract: An image processing apparatus determines (3H) a reference pixel position for each pixel by an interpolation calculation using the distortion correction values for representative pixels stored in a correction value storage unit (2H), decides (4H) whether the distortion correction values used in the interpolation satisfy a predetermined condition, reads (5H) a plurality of pixel values from an image data storage unit (1) according to values of their reference pixel position, determines (6H) first interpolation coefficients (C6) from a value of its reference pixel position, and determines the pixel value D7 in the output image from the plurality of pixel values read and the first interpolation coefficients (C6).

Abstract: There are provided a first image enlarging means (2A) for enlarging the input image (Din) and outputting a first enlarged image (D2A); a high-frequency component image generating means (1) for extracting a high-frequency component of the input image (Din) and generating a first high-frequency component image (D1); a second image enlarging means (2B) for enlarging the first high-frequency component image (D1) and outputting a second enlarged image (D2B); a high-frequency component image processing means (3) for processing the second enlarged image (D2B) and generating a second high-frequency component image (D3); and a means (4) for adding the first enlarged image (D2A) and the second high-frequency component image (D3) and outputting the result. This provides the enlarged image with adequate high-frequency components, and a sense of resolution of the enlarged image can be obtained.

Abstract: An image processing apparatus (5) that corrects an input image signal (Xin) pixel by pixel to generate a corrected image signal (Xout), having a filtering means (2) that determines a luminance distribution of a pixel to be corrected and pixels neighboring the pixel to be corrected, a correction gain calculation means (3) that determines the correction gain of the pixel to be corrected, and an operation means (4) that uses the correction gain determined by the correction gain calculation means to perform an operation on the input image signal pixel by pixel. With this simple configuration, the dynamic range of the input image can be appropriately improved.

Abstract: An image processor is provided with the high-frequency component detecting unit that calculates a convolution for each of regions of interest in part of an image region of input image data, to output the high-frequency component detection result for each pixel of interest; the smoothing unit that smoothes the image data, to output the smoothed image data; and the image data processing unit that combines based on the high-frequency component detection result the image data with the smoothed image data, to output the combined image data; wherein the image data processing unit varies the combination rate for the smoothed image data, based on the high-frequency component detection result. Thereby, even when a region in the image data contains such high frequency components as a checkered pattern has, an image resistant to moiré that would be generated in magnifying or reducing of the image on a region basis can be displayed without deterioration of image quality.

Abstract: A method and apparatus for processing images, and an image display apparatus are provided that can produce favorable images even when digitized image are partially magnified (enlarged) or reduced (shrunk). The apparatus for expanding or reducing input image data supplied thereto, for each area of the image data, comprises a high frequency (HF) component smoothing processor that generates smoothed-HF-component image data by smoothing HF components of the input image data; a partial magnification/reduction controller that generates partial magnification/reduction control information that designates positions of pixels in image data obtained after expanding or reducing the input image data for each image area; and a pixel data generator that generates pixel data of pixel positions designated by the partial magnification/reduction control information in the smoothed-HF-component image data, by using pixel data in a neighborhood of the designated pixel positions.