In accordance with an embodiment, an image processing apparatus comprises a scanner; a designation section configured to designate a color presented in an original document as the object to be removed; extraction section configured to extract color information of the color to be removed based on image data which is obtained by reading, using the scanner, a color information extraction sheet on which an image is formed with a material of the color to be removed; and a conversion section configured to form, based on the designation of the designation section and the color information extracted by the extraction section, an image by removing the image data in the color designated to be removed from the image data of the original document.

Examples herein involve retrieving a color transformation from a highlighter color transform, and processing an image using the color transformation to enhance highlighter colors in the image, the image scanned by a scanner using strobed illumination.

There are provided an image processing apparatus and a control method for controlling the image processing apparatus. The control method includes extracting a high-luminance region including a high-luminance pixel having a higher luminance than a predetermined luminance included in received image data, expanding the high-luminance region by setting pixel values of pixels configuring a surrounding region of the high-luminance region determined based on an area of the high-luminance region to the same pixel value as the high-luminance pixel, and outputting image data having the expanded high-luminance region.

A technology that enables accurate position specification on an image displayed on a screen to perform processing and correction of the image data is provided. When the image is printed on a sheet on which a dot pattern is printed, a reference point of the image on the display device is set and the reference point is printed in a visible mark together with the image. This mark is imaged with an imaging means, and calibration is performed in which position coordinates of the marks on the sheet and the reference points of the image are matched, thereby preventing variation in coordinates between designation made on the sheet with the imaging means and processing on the image.

In accordance with an embodiment, an image processing apparatus comprises a scanner; a designation section configured to designate a color presented in an original document as the object to be removed; extraction section configured to extract color information of the color to be removed based on image data which is obtained by reading, using the scanner, a color information extraction sheet on which an image is formed with a material of the color to be removed; and a conversion section configured to form, based on the designation of the designation section and the color information extracted by the extraction section, an image by removing the image data in the color designated to be removed from the image data of the original document.

An image processing apparatus includes an image information acquisition unit, an elimination color setting unit, and a processing unit. The image information acquisition unit acquires image information of a document image in which multiple colors that are different from a predetermined document color are added to an image which is rendered in the predetermined document color. The elimination color setting unit sets a color which is defined as an elimination color from among the multiple colors. The processing unit performs predetermined processing for a color among the multiple colors that is different from the elimination color set by the elimination color setting unit.

In accordance with an embodiment, an image processing apparatus comprises a scanner; a designation section configured to designate a color presented in an original document as the object to be removed; extraction section configured to extract color information of the color to be removed based on image data which is obtained by reading, using the scanner, a color information extraction sheet on which an image is formed with a material of the color to be removed; and a conversion section configured to form, based on the designation of the designation section and the color information extracted by the extraction section, an image by removing the image data in the color designated to be removed from the image data of the original document.

In accordance with an embodiment, an image processing apparatus comprises a scanner; a designation section configured to designate a color presented in an original document as the object to be removed; extraction section configured to extract color information of the color to be removed based on image data which is obtained by reading, using the scanner, a color information extraction sheet on which an image is formed with a material of the color to be removed; and a conversion section configured to form, based on the designation of the designation section and the color information extracted by the extraction section, an image by removing the image data in the color designated to be removed from the image data of the original document.

Reference portions are arranged in a reference area outside a main area in a main scanning direction, each having a lower surface of one of a plurality of determination colors. A reference data offset value is set based on reference pixel data of the reference area obtained when a light emitting unit of a scanning unit is not caused to emit light. A color determination process is executed to correct the reference pixel data in line image data obtained when the light emitting portion is caused to emit light with the reference data offset value, and to determine which determination color the corrected reference pixel data is data of. A unit drive device executes driving operations that are sequentially selected from a plurality of trial driving operations according to the determination result of the color determination process, and positions the scanning unit at a home position.

An image processing apparatus (100) includes a determination unit configured to determine, on the basis of color information of a detected writing target, color information of an output image generated from a writing content image that is an image of a writing content written on the writing target.