Image forming system for generating print image data of an image to include identification information in a margin area outside the image, image forming method, and storage medium

1. An image forming system comprising:

processing circuitry configured to:

generate print image data for printing a first image included in print job data, on a conveyance medium;

control printing on the conveyance medium based on the print image data;

reduce the first area toward an edge of the conveyance medium to set the area for printing the second image; and

generate the print image data including a third area and a fourth area outside the third area, wherein

the generation of the print image data includes setting an area for printing a second image including identification information to identify each page of the conveyance medium, in a first area where the first image is not printed,

the third area is a non-printing area obtained by reduction of the first area toward the edge of the conveyance medium, and

the fourth area includes the second image and is in the first area before the reduction.

2. The image forming system according to claim 1 ,

wherein the processing circuitry is configured to generate the print image data including a blank image in an area excluding the second image in the fourth area, and

wherein the blank image indicates that printing is not performed.

3. The image forming system according to claim 1 ,

wherein the processing circuitry is configured to locate the second image including the identification information, outside the first image and the third area that is reduced by narrowing the first area toward the edge of the conveyance medium, and locate a blank image indicating that printing is not performed, next to the second image, to generate the print image data.

4. The image forming system according to claim 1 ,

wherein the processing circuitry is configured to:

search for a cutting mark from the first image; and

generate the print image data including the second image in a case where the first image includes the cutting mark.

5. The image forming system according to claim 1 ,

wherein the processing circuitry is configured to reduce the first area to generate the print image data, in a case where setting for adding and printing the second image including the identification information is valid.

6. The image forming system according to claim 1 ,

wherein the first area is an area set in advance for each type of sheet as an area where printing is not performed.

7. An image forming method to be performed by a computer, the image forming method comprising:

generating print image data for printing a first image included in print job data, on a conveyance medium;

controlling printing on the conveyance medium based on the print image data;

reducing the first area toward an edge of the conveyance medium to set the area for printing the second image; and

generating the print image data including a third area and a fourth area outside the third area, wherein

the generation of the print image data includes setting an area for printing a second image including identification information to identify each page of the conveyance medium, in a first area where the first image is not printed,

the third area being a non-printing area obtained by reduction of the first area toward the edge of the conveyance medium, and

the fourth area including the second image and is in the first area before the reduction.

8. A non-transitory, computer-readable storage medium storing computer-readable program code that causes a computer to perform:

generating print image data to print a first image included in print job data, on a conveyance medium;

printing on the conveyance medium based on the print image data;

reducing the first area toward an edge of the conveyance medium to set the area for printing the second image; and

generating the print image data including a third area and a fourth area outside the third area, wherein

the generation of the print image data includes setting an area for printing a second image including identification information to identify each page of the conveyance medium, in a first area where the first image is not printed,

the third area being a non-printing area obtained by reduction of the first area toward the edge of the conveyance medium, and

the fourth area including the second image and is in the first area before the reduction.