| CPC G06F 3/121 (2013.01) [G06F 3/1211 (2013.01); G06F 3/1234 (2013.01); G06K 15/1836 (2013.01)] | 10 Claims |

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9. A printing system configured to:
perform a first process of generating a rasterized image by rasterizing received image data;
perform a second process of generating rasterized images by rasterizing the received image data a plurality of times by a processing unit that performs the first process; and
contrast the rasterized image obtained by the first process with a plurality of the rasterized images obtained by the second process performed a plurality of times, and check whether the rasterized image obtained by the first process is invalid,
wherein the second process is performed at a time according to a predetermined setting,
wherein the predetermined setting includes a time after printing of the rasterized image obtained by the first process on a recording medium is started,
wherein the predetermined setting interrupts the second process in a case where a condition related to printing performance on the recording medium is satisfied.
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