An image reading apparatus includes a front-side reader, which includes a white LED configured to irradiate an original with light and a CMOS sensor configured to receive light that is reflected by the original. The front-side reader is configured to generate read data that represents a luminance value of an image on the original from the result of receiving light with the CMOS sensor. The image reading apparatus stores, in a non-volatile memory, a condition for determining whether there is a sub-scanning color shift, and uses a sub-scanning color shift detector to determine whether there is a sub-scanning color shift based on the read data obtained from the front-side reader and the condition stored in the non-volatile memory. When there is a sub-scanning color shift, the image reading apparatus corrects the sub-scanning color shift by correcting the read data with a color shift corrector.

A service use support device used for receiving a plurality of services, includes a hardware processor that: acquires one or more of target images to be processed; selects a preferred service from among the plurality of services for each of the one or more of target images on the basis of a degree at which each attribute satisfies a condition set for each of the plurality of services; and transfers each of the one or more of target images to a provider that provides each preferred service.

A service use support device used for receiving a plurality of services, includes a hardware processor that: acquires one or more of target images to be processed; selects a preferred service from among the plurality of services for each of the one or more of target images on the basis of a degree at which each attribute satisfies a condition set for each of the plurality of services; and transfers each of the one or more of target images to a provider that provides each preferred service.

An image processing apparatus performs: acquiring target image data representing a target image including a plurality of pixels, the target image data including a plurality of sets of component image data representing respective ones of a plurality of component images; smoothing the plurality of component images to generate respective sets of a plurality of sets of smoothed component image data representing respective ones of a plurality of smoothed component images; enhancing an edge in each of the plurality of smoothed component images to generate corresponding one set of a plurality of sets of enhanced component image data; generating single-component image data including one type of component value corresponding to each of the plurality of pixels by using the plurality of sets of enhanced component image data; and specifying a plurality of edge pixels using the single-component image data, the plurality of edge pixels constituting an edge in the target image.

An image scanner includes: a document table; a document cover; a light source; an image sensor; and a circuit configured to: acquire, as pre-reading black data, the line data that is generated by the image sensor in a state where the light source is turned off; after acquiring the pre-reading black data, acquire, as line image data, the line data that is generated by the image sensor in a state where light is emitted from the light source to an original document supported on the document table; after acquiring the line image data, acquire, as post-reading black data, the line data that is generated by the image sensor in a state where the light source is turned off; determine black reference data based on the post-reading black data and the pre-reading black data; and perform black correction on the line image data based on the black reference data.

An original image is read as an aggregate of a plurality of pixels in which adjacent pixels have different colors (R, G, and B) in a main scanning direction and in a sub-scanning direction, and the read pixels of the respective colors are stored in a line memory in association with information on relative positions of the pixels with respect to another pixel. Then, the stored pixels are sorted so that pixels having the same color are adjacent to each other, and an abnormal pixel (dust) not present in the original image is detected based on the state of the sorted pixels. With this, the dust not present in the original image is detected without increasing the cost, and the dust is corrected without forming a conspicuous trace of correction.

A spectral characteristic acquiring apparatus includes a color data acquiring unit including a plurality of spectral sensors configured to receive reflected light from an object that has been irradiated with light to acquire color data of the object, a spectral characteristic calculating unit configured to estimate spectral characteristics of the object based on the acquired color data of the object using a preset transformation matrix, a first conveying unit configured to convey the object in a predetermined conveying direction, and a second conveying unit configured to convey the color data acquiring unit in a direction intersecting the predetermined conveying direction. The plurality of spectral sensors are arrayed in the predetermined conveying direction.

An image processing apparatus includes a processor configured to acquire an image and designate whether the image is a color image or a monochrome image based on a comparison of a feature quantity of the image and a threshold value. A storage unit stores the threshold value. A display unit displays whether the image has been designated a color image or a monochrome image by the processor. An input device is configured to receive user input for changing whether the image is designated a color image or a monochrome image. The processor changes the threshold value stored in the storage unit when the user input changes whether the image is designated a color image or a monochrome image.

An image processing apparatus is provided to alleviate degradation of the gradation of a color image in the case where images having a sensitivity different from each other are obtained by imaging one same object in black-and-white and color. The image processing apparatus includes a gradation control part obtaining a brightness signal representing a black-and-white image and a chroma signal representing a color image obtained by imaging a same object as that for the black-and-white image and that controls gradation of the chroma signal on the basis of the brightness signal. This configuration can suppress degradation of the gradation of a color image to be minimal in the case where images having a sensitivity different from each other are obtained by imaging one same object in black-and-white and color.

An illumination condition, which is used to irradiate a print product with light having illuminance higher than normal illumination, is derived based on exposure condition information at the time of photographing.