Image forming apparatus, control method of image forming apparatus, and computer-readable recording medium storing control program of image forming apparatus

A control method for an electrophotographic image forming apparatus capable of performing consecutive printing, the control method comprising:

• analyzing color information present in input image data set in a print job and determine, based on an analysis result, color density of each color toner image to be monitored,
• forming, based on the print job, a print image corresponding to the input image data in a first area of a recording medium, and forming a color measurement patch of each color toner image in a second area of the recording medium at the determine color density;
• measuring, during the print job, color information on the color measurement patch formed on the recording medium that is sequentially printed, and
• sequentially correcting, during the print job, the input image data or image formation condition for performing printing at a next time point, the input image data or the image formation condition being corrected based on the measured color information on the color measurement patch such that density unevenness along a predetermined direction appearing in the print image is adjusted.

A non-transitory computer-readable recording medium storing therein a control program for an electrophotographic image forming apparatus capable of performing continuous printing, wherein

• the control program is configured to:
• analyze color information present in input image data set in a print job and determine, based on an analysis result, color density of each color toner image to be monitored,
• form, based on the print job, a print image corresponding to the input image data in a first area of a recording medium, and form a color measurement patch of each color toner image in a second area of the recording medium at the determine color density;
• measure, during the print job, color information on the color measurement patch formed on the recording medium that is sequentially printed, and
• sequentially correct, during the print job, the input image data or image formation condition for performing printing at a next time point, the input image data or the image formation condition being corrected based on the measured color information on the color measurement patch such that density unevenness along a predetermined direction appearing in the print image is adjusted.