JP2009177798A5

JP2009177798A5 -

Info

Publication number: JP2009177798A5
Application number: JP2008320304A
Authority: JP
Filing date: 2008-12-16
Publication date: 2012-02-09
Anticipated expiration: 2028-12-16

Description

上記課題を解決すべく、本願発明の画像処理装置は、複数のチャンネルを有する画像データを読み取る複数のラインセンサを有し、該複数のラインセンサを用いて読み取られた画像データの補正を行い、該複数のラインセンサのうち、隣接したラインセンサそれぞれによる原稿画像の読み取り位置が、１画素未満ずれている複数のフレーム分の画像データを取得する補正手段、前記補正手段にて補正された複数のフレーム分の画像データを用いて補間処理を行うことで、前記ラインセンサで読み取った画像データの解像度より高い解像度のモノクロ画像データを得る高解像度変換手段、を有することを、を有することを特徴とする。 In order to solve the above problems, an image processing apparatus of the present invention includes a plurality of line sensors for reading image data having a plurality of channels, corrects the image data read by using the plurality of line sensors, of the plurality of line sensors, the reading position of the document image by the respective adjacent line sensors, correcting means for obtaining image data of a plurality of frames which are offset less than one pixel, a plurality of which are corrected by said correction means Having high-resolution conversion means for obtaining monochrome image data with a resolution higher than the resolution of the image data read by the line sensor by performing an interpolation process using image data for frames. To do.

Claims

Having a plurality of line sensors for reading image data having a plurality of channels ;
Corrects the image data read by using the plurality of line sensors,
Of the plurality of line sensors, the reading position of the document image by the respective adjacent line sensor acquires image data of a plurality of frames which are offset less than one pixel correction means,
High-resolution conversion means for obtaining monochrome image data having a resolution higher than the resolution of the image data read by the line sensor by performing interpolation using image data for a plurality of frames corrected by the correction means. An image processing apparatus comprising:

Said plurality of line sensors are red Color Camera filter with the line sensor, the blue color filter is marked with line sensor, in claim 1, characterized in that the green color filter is composed with line sensor The image processing apparatus described.

The plurality of line sensors includes a line sensor having a red color filter, a line sensor having a blue color filter, a line sensor having a green color filter, and a line sensor not having a color filter. The image processing apparatus according to claim 1.

The correction means is offset correction,
To compensate one or more pixels of the deviation of the reading position of the originals image caused in the sub-scanning direction by a distance between a position where the plurality of line sensors are installed,
The image processing apparatus according to claim 1, wherein the image processing apparatus outputs image data for a plurality of frames in which the reading position of the document image is shifted by less than one pixel in the sub-scanning direction.

The plurality of line sensors are inclined with respect to a reference position, and the correction means is angle correction, and each of the plurality of image data is corrected by rotating to compensate for the inclination. The image processing apparatus according to claim 1.

The image processing apparatus further includes signal value acquisition means for acquiring signal values of the respective image data acquired using the plurality of line sensors,
The image processing apparatus according to claim 1, wherein the high-resolution conversion is performed on an area in which the signal value acquisition unit determines that there are two or more image data with similar signal values.

The image processing apparatus according to claim 6, wherein the high-resolution conversion is performed on an area in which the signal values of the image data are determined to be similar by the signal value acquisition unit.

The image processing apparatus according to claim 6, wherein the signal value acquisition unit performs the high-resolution conversion on a character portion of a region where it is determined that the signal values of all the image data are similar.

The image processing apparatus further includes reference image data selection means for selecting one reference image data from image data acquired using the plurality of line sensors,
The image processing apparatus according to claim 1, wherein the high-resolution conversion is performed on an area where it is determined that there is image data having a signal value similar to the signal value of the reference image data.

The image processing apparatus according to claim 9, wherein the reference image data is image data acquired by a line sensor having no color filter.

Read image data in which the reading position of the original line sensor and the adjacent line sensor is shifted by less than one pixel, and has a reading means composed of a plurality of line sensors,
An image having high-resolution conversion means for obtaining monochrome image data having a resolution higher than the resolution of the image data read by the line sensor by performing an interpolation process using the image data acquired by the reading means. Processing equipment.

Having a plurality of line sensors for reading image data having a plurality of channels;
Corrects the image data read by using the plurality of line sensors,
Of the plurality of line sensors, the reading position of the document image by the respective adjacent line sensor acquires image data of a plurality of frames which are offset less than one pixel correction step,
A high-resolution conversion step of obtaining monochrome image data having a resolution higher than the resolution of the image data read by the line sensor by performing an interpolation process using the image data for a plurality of frames corrected in the correction step,
An image processing method comprising:

It said plurality of line sensors, the red color filter is marked with line sensors, and blue color filters with the line sensor, in claim 1 2, characterized in that it is composed of a line sensor with a green color filter The image processing method as described.

The plurality of line sensors includes a line sensor having a red color filter, a line sensor having a blue color filter, a line sensor having a green color filter, and a line sensor not having a color filter. the image processing method according to claim 1 2, characterized in that.

In the correction step, offset correction is performed on the image data,
Compensating for a deviation of one or more pixels in the reading position of the document image that occurs in the sub-scanning direction depending on the interval between the positions where the plurality of line sensors are installed,
The image processing method according to claim 1 2, wherein the outputting the image data for a plurality of frames reading position of the original image is shifted less than one pixel in the sub-scanning direction.

The plurality of line sensors are installed to be inclined with respect to a reference position, and in the correction step, angle correction is performed, and the image data is rotated and corrected to compensate for the tilt. Item 12. The image processing method according to Item 2 .

The image processing method further includes a signal value acquisition step of acquiring a signal value of each image data acquired using the plurality of line sensors,
The image processing method according to claim 1 2, characterized in that performing the high-resolution conversion by said signal value acquisition step, the signal value is determined to be image data similar there is more than one region.

The image processing method according to claim 17 , wherein the high-resolution conversion is performed on a region in which the signal values of all the image data are determined to be similar in the signal value acquisition step.

The image processing method according to claim 17 , wherein, in the signal value acquisition step, the high-resolution conversion is performed on a character portion of a region where it is determined that the signal values of all the image data are similar. .

The image processing method further includes a reference image data selection step of selecting one reference image data from image data acquired using the plurality of line sensors,
The image processing method according to claim 1 2, characterized in that performing the high-resolution conversion region determined that there is image data having a signal value that is similar to the signal value of the reference image data.

21. The image processing method according to claim 20 , wherein the reference image data is image data acquired by a line sensor having no color filter.

An image processing method in an image processing apparatus having a plurality of line sensors, a reading step of reading image data in which a reading position of an original line image and an adjacent line sensor is shifted by less than one pixel;
A high-resolution conversion step of obtaining monochrome image data having a resolution higher than the resolution of the image data read by the line sensor by performing an interpolation process using the image data acquired by the plurality of line sensors. An image processing method.

A program for causing a computer to execute the image processing method according to claim 12.