Patent ID: 7224821

Claim:
A prepress system comprising: a raster image processor configured to develop first print image data to display resolution to create first raster image data, and to develop second print image data to the display resolution to create second raster image data; a data storage configured to store the first raster image data created in advance prior to creation of the second raster image data; a plate image inspection processor configured to execute a plate image inspection process by comparing the first and second raster image data, and to display on a display device a result of the plate image inspection process; and a controller configured to control the raster image processor, the data storage, and the plate image inspection processor, wherein the controller includes a parameter setting section configured to set a flow pattern of a prepress process, the second print image data is proofed data of the first print image data, the parameter setting section sets a first flow pattern of the prepress process for the first print image data and a second flow pattern of the prepress process for the second print image data, the first flow pattern including a step where the data storage stores the first raster image data obtained by the raster image processor, the second flow pattern including a step where the plate image inspection processor executes the plate image inspection process by comparing the first and second raster image data, upon receiving the first print image data, the controller executes the prepress process according to the first flow pattern where the controller causes the data storage to store the first raster image data, and upon receiving the second print image data, the controller executes the prepress process according to the second flow pattern where the controller causes the plate image inspection processor to execute the plate image inspection process.