Ink jet recording apparatus and recording method

An image forming method comprising:

• enlarging an image of input image data to an enlarged image including a portion protruding into a set margin region formed at a side end of a recording medium;
• converting the image data of which the image has been enlarged into dot data;
• detecting the side end position of the recording medium being conveyed in a predetermined direction after completion of the conversion into the dot data;
• possessing, based on the detected side end position of the recording medium and the length of the set margin region in a cross direction cross to the predetermined direction, the dot data to trim dot thereof about the portion of the enlarged image protruding into the set margin region so as to prevent the portion of the enlarged image protruding into the set margin region from being formed on the recording medium;
• and
• forming an image on the recording medium based on the processed dot data.

An image forming apparatus comprising:

• a conveyance unit configured to convey a recording medium;
• a processing unit configured to generate dot data for forming an image based on obtained image data;
• an image forming unit configured to form an image on the recording medium conveyed by the conveyance unit based on the dot data generated by the processing unit;
• a detection unit configured to detect a side end of the recording medium conveyed by the conveyance unit;
• and
• an acquisition unit configured to acquire predicted positional information of the recording medium,
• wherein the processing unit changes a position of an image of the obtained image based on the predicted positional information acquired by the acquisition unit, then converts the image data on which the size of image has been enlarged into dot data, and based on a result of detection by the detection unit, processes the dot data so that image data is not performed on a portion of the image protruding over a set margin region to be formed at the side end of the recording medium.

An image forming apparatus comprising:

• a conveyance unit configured to convey a recording medium;
• a processing unit configured to generate dot data for forming an image based on obtained image data;
• an image forming unit configured to form an image on the recording medium conveyed by the conveyance unit based on the dot data generated by the processing unit;
• and
• a detection unit configured to detect a side end of the recording medium conveyed by the conveyance unit,
• wherein the processing unit changes a position of the image of the image data based on a result of detection by the detection unit, converts the image data into dot data, and processes the dot data so that image formation is not performed on a portion of the image protruding over a set margin region at the side end of the recording medium based on a result of another detection by the detection unit after starting conversion of the image information.