A method and system for detecting color conversion problems in a printed image, wherein a region of interest comprising pixels is identified on print job image. A pixel color value for at least one color plane is received for each pixel in each region of interest, as well as pixel color values adjacent to each region of interest. An average pixel color value is calculated for the pixels immediately surrounding each single pixel. This average pixel color value is compared to the pixel color value for the single pixel. A number of instances where the pixel color value and the average pixel color value exceeds a first threshold value is calculated. If the number of instances is less than a second threshold value, a new image is processed. If the number of instances is more than the second threshold value, the print job is flagged for review.

An image forming apparatus includes a rotatable image bearer, a transfer rotator, a detector, and circuitry. The image bearer bears an image. The transfer rotator transfers the image from the image bearer onto a recording medium sandwiched and conveyed between the image bearer and the transfer rotator. The detector detects length information indicating a length, in a direction of conveyance of the recording medium, of the image on the recording medium. The circuitry corrects a correction value, based on the length information detected by the detector and a target value of the length information, to correct an image magnification, in the direction of conveyance of the recording medium, of the image to be formed on the recording medium. The circuitry controls an image forming operation of forming the image on the recording medium with the correction value.

Methods and systems for rendering a transparent pantograph pattern. A background path and a foreground path for a pantograph pattern can be determined. An intersection internal to the background path and external to foreground path that is to be marked can be defined. Areas to be masked can be defined with respect to the pantograph pattern. The pantograph pattern can be then rendered as a transparent vector pattern pantograph by writing a background based on the background path and a foreground based on the foreground path and the areas defined as masked.

A method and system for detecting color conversion problems in a printed image, wherein a region of interest comprising pixels is identified on print job image. A pixel color value for at least one color plane is received for each pixel in each region of interest, as well as pixel color values adjacent to each region of interest. An average pixel color value is calculated for the pixels immediately surrounding each single pixel. This average pixel color value is compared to the pixel color value for the single pixel. A number of instances where the pixel color value and the average pixel color value exceeds a first threshold value is calculated. If the number of instances is less than a second threshold value, a new image is processed. If the number of instances is more than the second threshold value, the print job is flagged for review.

In an example, a method includes rasterizing a seed image using a processor. A plurality of rasterized modified images may be generated from the rasterized seed image. Generating each rasterized modified image may include determining an image attribute modification and applying the determined image attribute modification to at least a portion of the rasterized seed image to generate the rasterized modified image.

A method for evaluating a print quality of a printed document that is printed by a printer is provided. The printer comprises a pre-print image scanner, a post-print image scanner, and a printhead disposed between the pre-print image scanner and the post-print image scanner. The method comprises generating a pre-printing image of a print media, generating the printed document, generating a post-printing image of the printed document, generating a validation image by comparing the post-printing image with the pre-printing image, and comparing the validation image with the source image.

An apparatus configured to generate image data represented in achromatic color from input image data and output the generated image data to a printer includes a controller. The controller is configured to replace color information of an object included in the input image data with an achromatic signal value, determine, based on an achromatic signal value corresponding to color information of a pixel of interest in the input image data, whether the pixel of interest satisfies a predetermined condition, and perform enhancement processing on the color information of the pixel of interest in a case where the pixel of interest is determined not to satisfy the predetermined condition.

The image forming apparatus includes a printing device, an image reading device, a job management unit, and a document detection processing unit. The image reading device reads an image in a predetermined range in which a document can be arranged, as a read image. The job management unit acquires a front side image and a back side image of a card document, and prints the front side image and the back side image on both sides of a print sheet using the printing device. The document detection processing unit specifies a document image area of the front side image and a document image area of the back side image. The job management unit selects a larger size as the common image area size when a difference in size between the document image areas of the front side and the back side exceeds a predetermined threshold.

In some examples, print mode quality selection may include determining, based on a preliminary rendering of print data, resulting pixel tones. Print mode quality selection may further include generating raster data based at least in part on a further rendering of the print data, and generating further print data including the raster data and a specified print mode.

An image processing apparatus includes a first analyzing unit configured to analyze at least a first page data of print data, and a second analyzing unit configured to analyze at least a second page data of the print data. In a case where an error occurs in analyzing the second page data by the second analyzing unit before completing analyzing of the first page data, the second analyzing unit stops analyzing the second page data, and the first analyzing unit continues analyzing the first page data until analyzing of the first page data is completed, wherein the first page data proceeds to the second page data in the print data. The first analyzing unit and the second analyzing unit are implemented by one or more processors or circuitry, or a combination thereof.