An image processing apparatus comprises: an acquiring unit that acquires image data representing a document image that includes characters; an extracting unit that extracts, from the document image represented by the image data acquired by the acquiring unit, a character that has undergone a modification for distinguishing from another character; a processing unit that processes the image data by reducing a density of the character other than the extracted character below a density indicated by the acquired image data; and an output unit that outputs the image data processed by the processing unit to an image forming apparatus.

An image processing apparatus comprises: an acquiring unit that acquires image data representing a document image that includes characters; an extracting unit that extracts, from the document image represented by the image data acquired by the acquiring unit, a character that has undergone a modification for distinguishing from another character; a processing unit that processes the image data by reducing a density of the character other than the extracted character below a density indicated by the acquired image data; and an output unit that outputs the image data processed by the processing unit to an image forming apparatus.

An information processing apparatus connected to an image forming unit that forms an image based on image data and a reading unit that reads an image as image data is provided. The apparatus acquires a pixel count of image data formed by pixels; encodes the at least one color component and the pixel count to be multiplexed on the image data; outputs the image data to the image forming unit; restores the multiplexed at least one color component and the multiplexed pixel count from the image data read by the reading unit; and replaces the pixels of the pixel count of a color component corresponding to the at least one color component included in the image data and restored from the image data.

An information processing apparatus connected to an image forming unit that forms an image based on image data and a reading unit that reads an image as image data is provided. The apparatus acquires a pixel count of image data formed by pixels; encodes the at least one color component and the pixel count to be multiplexed on the image data; outputs the image data to the image forming unit; restores the multiplexed at least one color component and the multiplexed pixel count from the image data read by the reading unit; and replaces the pixels of the pixel count of a color component corresponding to the at least one color component included in the image data and restored from the image data.

In one example in accordance with the present disclosure, a printing device is described. The printing device includes a print controller with a processor and memory. The print controller generates print instructions. Specifically, the print controller receives print image data representing an image to be printed and identifies enclosed regions in a background print agent plane. The print controller also determines a size of the enclosed regions of background print agent plane and responsive to the size of an enclosed region being smaller than a threshold size, removes the enclosed region from the background print agent plane. The printing device also includes a print agent distribution system to apply the background print agent and the image print agent to a substrate according to the print instructions.

In one example in accordance with the present disclosure, a printing device is described. The printing device includes a print controller with a processor and memory. The print controller generates print instructions. Specifically, the print controller receives print image data representing an image to be printed and identifies enclosed regions in a background print agent plane. The print controller also determines a size of the enclosed regions of background print agent plane and responsive to the size of an enclosed region being smaller than a threshold size, removes the enclosed region from the background print agent plane. The printing device also includes a print agent distribution system to apply the background print agent and the image print agent to a substrate according to the print instructions.

Disclosed is a signal processing device and an image display apparatus including the same. In the signal processing device and the image display apparatus according to the present disclosure, a High Dynamic Range (HDR) processor receives an image signal and adjust a luminance of the image signal, and a reduction unit configured to amplify the adjusted luminance of the image signal and increase a resolution of the grayscale of the image signal to generate an enhanced image signal, wherein the enhanced image signal provides an increased luminance and grayscale resolution of the image signal while maintaining high dynamic range within the displayed HDR image. Accordingly, expression of high grayscale of a received image may improve.

An image processing portion of an image reading apparatus includes an extraction portion that extracts color information, a management portion that manages management color information that is an estimated value of the color information based on a control signal, a determination portion that determines whether or not the color information matches the management color information, and a writing control portion that causes the storage portion to store the pixel data when it is determined that the color information matches the management color information and that does not cause the storage portion to store the pixel data when it is determined that the color information does not match the management color information. When the color information does not match the management color information, the management portion adjusts the management color information to match the color information.

An image processing portion of an image reading apparatus includes an extraction portion that extracts color information, a management portion that manages management color information that is an estimated value of the color information based on a control signal, a determination portion that determines whether or not the color information matches the management color information, and a writing control portion that causes the storage portion to store the pixel data when it is determined that the color information matches the management color information and that does not cause the storage portion to store the pixel data when it is determined that the color information does not match the management color information. When the color information does not match the management color information, the management portion adjusts the management color information to match the color information.

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.