Konica-minolta Holdings, Inc.

Konica Minolta Opto, Inc.

Konica Minolta, Inc.

Sei Koh

Koichi Kamon

Kiyoshi Takagi

Jun Takayama

Tetsuya Katagiri

Po-Chieh Hung

Provided is an image inputting apparatus wherein luminance signals having a high S/N ratio can be generated even during nighttime with a small quantity of photons. An imaging element images image components. A color signal generating section generates color signals from the image components. A color space conversion section converts the color signals into a color space that includes luminance signals and color difference signals. The color space conversion section calculates a luminance signal obtained by adding the image components, as the luminance signal of the color space to be converted.

Image input apparatus

Provided is an image input device capable of generating a luminance signal having a high ratio of S/N of an image, and further capable of providing the image with a little uncomfortable feeling even in the night time when the amount of photons is few, wherein, when a visible light luminance signal is relatively low, and an infrared component is predominant in an original image component, for example, correcting color-difference signals with added luminance prevents the color-difference signals with the added luminance from being too high, thereby it becomes possible to perform more natural color reproduction, which is close to original visible light, and gives a little uncomfortable feeling.

Image input device

An object of the invention is to adequately remove a halo in an image processing method and apparatus for conversion of an image into an image suitable for image recording and displaying by compression of the dynamic range of the image. As means for solution, an image processing method that compresses the dynamic range of image data includes: an input process of inputting image data; a low frequency component calculation process of calculating, for each pixel, a low frequency component of image data inputted through the input process; an image processing process of calculating an image-processed value for each pixel, according to the below-described equation; and an output process of outputting image data including the image-processed value calculated by the image processing process. Snp=a1&#xb7;Snus+a2&#xb7;(Snf&#x2212;Snus), wherein Snp represents an image-processed value; a1 and a2 are represent factors (0&#x3c;a1&#x3c;1 and 0&#x3c;a2&#x3c;1); Snus represents a low frequency component, of each pixel, calculated through the low frequency component calculation process; and Snf represents an image data value, of each pixel, inputted through the input process.

Image processing method and image processing apparatus

Disclosed are an image processing method, an image processing apparatus, and an image processing program which perform appropriate gradation processing in each brightness region while gradation continuity is maintained. The image processing apparatus which applies image processing including gradation conversion processing to image data, the image processing apparatus having: an image processing section for applying image processing to the image data based on each of a plurality of different gradation conversion processing characteristics, thereby generating a plurality of image-processed image data; a synthesis ratio calculating section for calculating the synthesis ratios of the plurality of image-processed image data by referencing image information of the image data prior to image processing; and a synthesis section for synthesizing the plurality of image-processed image data based on the synthesis ratios, thereby generating image data to be outputted.

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Tokyo, Japan

Sei Koh