An image processing apparatus converts, according to light on an image printed based on input image data, the input image data into image data for illumination output superimposed on the image, includes a deriving unit deriving an observing condition, an estimating unit estimating luminance characteristics based on the observing condition and reflectance characteristics corresponding to print image data, an introducing unit introducing target luminance characteristics based on the print luminance characteristics, a setting unit setting illumination converting characteristics converting the input image data into the image data for illumination output based on the print luminance characteristics and the target luminance characteristics, and a converting unit converting gradation of the input image data using the illuminance characteristics, and the introducing unit introducing the target luminance characteristics such that, when reproducing ranges in the print luminance characteristics are different, a linear region of output luminance of relatively large reproducing range becomes larger.

A power management apparatus for managing a power supply to an electrical device, includes an interface circuit connectable to a plurality of different types of sensors, and a processor configured to generate first log data of states of each of the sensors in a plurality of periods of a day, acquire from the electrical device second log data of operational states of the electrical device in the periods, generate usage data that associates the operational states of the electrical device with the states of each of the sensors and the periods, using the usage data, determine an expected operational state of the electrical device corresponding to current states of each of the sensors and a current period, and control the power supply based on the expected operational state and a current operational state of the electrical device.

The image reading apparatus includes a reading unit, a reading region in which a first region in which a member that suppresses entry of external light is disposed and a second region other than the first region are arranged in a main scanning direction of the reading unit, and a controller, wherein the controller calculates intensity of external light in the second region based on a reading value in the reading region, wherein the reading value is obtained by the reading unit, determines whether the intensity of the external light exceeds a threshold value, performs a first shading correction on a reading value of a document transported to the reading region when the intensity of the external light exceeds the threshold value, and performs a second shading correction on the reading value of the document when the intensity of the external light does not exceed the threshold value.

An image scanning apparatus determines whether there is an influence of external light from the outside of the image scanning apparatus on scanning; decides a correction value corresponding to each of a plurality of sensors based on received light amounts of at least some of the plurality of sensors; and corrects, using the correction value corresponding to each of the plurality of sensors and decided, data corresponding to a received light amount of each of the plurality of sensors when scanning the original, wherein if it is determined that there is the influence of the external light, the image scanning apparatus decides the correction value corresponding to a first sensor and the correction value corresponding to a second sensor arranged at a position that is readily influenced by the external light based on the received light amount of the first sensor.

An image reading apparatus including a controller configured to perform an update processing for updating shading correction data stored in a memory by a generation processing of generating shading correction data based on an image signal of a reference member and perform a size determination processing for determining a size of a document based on an image signal of the document, wherein, when the document on the document platen is read, the controller performs the generation processing before the document is read, and an image processing portion performs the shading correction using the shading correction data generated before the document is read, and wherein, when the size determination processing is performed, the image processing portion performs the shading correction using the shading correction data stored in the memory, and the update processing is not performed.

An information processing apparatus includes a processor configured to: acquire information on main illumination from an illumination intensity distribution of an image that results from imaging an actual space; and control an expression of a thing using an illumination intensity distribution that is corrected with the information on the main illumination.

An image reading device includes an original document transport device, a first reading module and a control portion. When the control portion performs the light source turning-on confirmation processing of the first reading module, the control portion performs first opening/closing determination processing for determining the state of the opening and closing of a cover member, light amount acquisition processing for turning on a light source so as to acquire light amount data after it is determined in the first opening/closing determination processing that the cover member is in a closed state, second opening/closing determination processing for determining again the state of the opening and closing of the cover member after the acquisition of the light amount data in the light amount acquisition processing and light amount determination processing for determining the light amount after it is determined that the cover member is in the closed state.

A circuit acquires, as white correction data, read image data generated by reading an image of a reference member when light of each of three colors of a light source is sequentially emitted to the reference member; acquires, as original document image data, the read image data generated by moving the image sensor and by reading, with an image sensor, an image of an original document; determines, as an original document non-existence position, a position of a pixel at which all of the original document image red, green, and blue data have a same value; converts the original document image data to output image data by performing shading correction on the original document image data based on white correction data; and replaces the output image data at the original document non-existence position with a value closer to data indicative of white color than a value of the output image data.

An image scanning apparatus determines whether there is an influence of external light from the outside of the image scanning apparatus on scanning; decides a correction value corresponding to each of a plurality of sensors based on received light amounts of at least some of the plurality of sensors; and corrects, using the correction value corresponding to each of the plurality of sensors and decided, data corresponding to a received light amount of each of the plurality of sensors when scanning the original, wherein if it is determined that there is the influence of the external light, the image scanning apparatus decides the correction value corresponding to a first sensor and the correction value corresponding to a second sensor arranged at a position that is readily influenced by the external light based on the received light amount of the first sensor.

Provided is a method and a device for detecting open and closed states of a platen cover plate of an image reading apparatus. The method includes: controlling a scanning element to scan light at an edge of a platen to obtain a signal value representing a light intensity; determining whether an absolute difference value between the signal value and a preset standard value is greater than a preset tolerance value; sending a prompt signal to prompt a user to close the platen cover plate in response to the absolute difference value being greater than the preset tolerance value; and continuing to perform scanning work on a manuscript on the platen in response to the absolute difference value being not greater than the preset tolerance value. The influence on quality of the scanned image due to incomplete closing of the platen cover plate is prevented.