An image forensics system estimates a camera response function (CRF) associated with a digital image, and compares the estimated CRF to a set of rules and compares the estimated CRF to a known CRF. The known CRF is associated with a make and a model of an image sensing device. The system applies a fusion analysis to results obtained from comparing the estimated CRF to a set of rules and from comparing the estimated CRF to the known CRF, and assesses the integrity of the digital image as a function of the fusion analysis.

An image processing apparatus includes circuitry. The circuitry acquires a first colorimetric value of a target color mixture from a chart printed out in a first state. The circuitry acquires a second colorimetric value of an adjacent color mixture and acquires a second colorimetric value of an adjacent color mixture from a chart printed out in a second state. The circuitry acquires a third colorimetric value of a pre-correction color mixture. The circuitry adds a difference between the first colorimetric value and the second colorimetric value to the third colorimetric value and calculates a predicted colorimetric. The circuitry determines whether a color difference between the predicted colorimetric value and the first colorimetric value. The circuitry acquires, as a correction value, the second gradation value corresponding to the second colorimetric value. The circuitry corrects a corresponding one of the one or more first gradation values by using the correction value.

A copying apparatus capable of calibrating a copy position comprises a scanning module scanning an original to obtain an original image; and a processing module being electrically connected to the scanning module and recognizing whether the original image contains an original mark corresponding to a template mark. If the original image contains the original mark, then the processing module generates print data for being printed out according to the original image and a position parameter of the template mark. A copying method capable of calibrating the copy position is also provided. Thus, the copy position can be calibrated according to the mark of the original to prevent the copy result from having a positional offset. Consequently, no positional offset occurs even if the original is copied multiple times based on the previous generation of original.

A method for identifying print control elements for quality data acquisition includes encoding position information in a human-readable identification code, encoding specific print job information and the human-readable identification code in a machine-readable data code, positioning the codes alongside their associated print control element on a printing substrate, photographing the printed print control element and adjacent machine-readable data code using information from adjacent identification code, and processing data with a mobile communication device having a camera function and communications interface. Image data produced are exporting to a support computer via the communications interface. Machine-readable data code are decoded, image data on the computer are analyzed using information obtained from decoded machine-readable data code, the results of analysis are transmitted from the computer to the mobile communication device, and erroneous settings, found by image analysis, in a printing press producing printed products, are corrected.

A colorimetric device and a colorimetric method according to the present invention extract a chart region candidate, which is a candidate for a chart region, from an image of a color chart, obtain an evaluation value of this chart region candidate, determine whether or not the chart region candidate is the chart region based on this obtained evaluation value, obtain each position of a plurality of patches for the chart region candidate determined as the chart region as a result of the determination and colorimetrically measure each of the patches at each obtained position of the plurality of the patches.

An image forming apparatus includes: an image forming section; an image reading sensor and a colorimeter; a temperature sensor; a memory that stores a first color value and a second color value in a first color chart that has a larger number of patches than a second color chart; a processor that creates a scanner profile for converting a first color value into a second color value using color values obtained by the image reading sensor and the colorimeter, corrects the scanner profile according to the color values obtained by the image reading sensor and the colorimeter, and converts the first color value into the second color value using the corrected scanner profile.

An image forming apparatus combines a plurality of sub-movies representing operation procedures to be performed to perform maintenance on the image forming apparatus and plays the combined sub-movies sequentially as one movie. In response to stopping the movie being played, the image forming apparatus displays a replay mark for use to issue a command to replay the movie from the beginning of a sub-movie corresponding to a position where the movie is stopped.

An image forming apparatus includes: a first memory for temporarily storing therein image data output to an image forming unit; a data processing processor for reading the image data; a second memory for temporarily storing therein the image data; and a main processor for causing the data processing processor to sequentially read the image data, wherein the data processing processor includes: data transfer units; a transfer control unit; and a table, the main processor sets a start address and a size and instructs the transfer control unit to activate the data transfer units, the transfer control unit divides a size of image data and sets a start address and a size of divided image data, the data transfer units read corresponding image data and output it to the second memory, and the transfer control unit subsequently controls the data transfer units and notifies the transfer completion to the main processor.

An image processing apparatus includes circuitry. The circuitry acquires a first colorimetric value of a target color mixture from a chart printed out in a first state. The circuitry acquires a second colorimetric value of an adjacent color mixture and acquires a second colorimetric value of an adjacent color mixture from a chart printed out in a second state. The circuitry acquires a third colorimetric value of a pre-correction color mixture. The circuitry adds a difference between the first colorimetric value and the second colorimetric value to the third colorimetric value and calculates a predicted colorimetric. The circuitry determines whether a color difference between the predicted colorimetric value and the first colorimetric value. The circuitry acquires, as a correction value, the second gradation value corresponding to the second colorimetric value. The circuitry corrects a corresponding one of the one or more first gradation values by using the correction value.

Certain examples described herein relate to printer calibration. In certain cases, measurement data is received, the measurement data indicative of an adjustment to be applied to a given colorant in a set of colorants printable by a printing system. In certain examples, a Neugebauer primary area coverage (NPac) vector comprising an area coverage of a first Neugebauer primary (NP) is obtained. Based on the received measurement data, the NPac vector is adjusted by decreasing the area coverage in the NPac vector of the first NP and increasing an area coverage in the NPac vector of a second NP. The first NP and the second NP correspond to colorant combinations that differ by a predetermined amount of the given colorant.