Recording apparatus with image modification for increased image resolution

An information recording apparatus comprising:

• memory means for temporarily storing a part of bit information from bit information generated by a bit information generator;
• feature detecting means for detecting whether the part of bit information stored in said memory means coincides with one predetermined feature of predetermined plural features;
• information modifying means for modifying print information of an object pixel which corresponds to a bit in the part of bit information stored in said memory means, in a case where said feature detecting means detects coincidence with said one predetermined feature of the predetermined plural features;
• and
• recording means for modulating a light beam into signals corresponding to sub pixels smaller than the part of bit information stored in said memory means, according to the print information obtained from said information modifying means;
• wherein said information modifying means inhibits modification of the object pixel on bit information for a line image, in a case where an arrangement of bit information on a right- or left-hand contour constitutes a rectangular portion with two or more bits in a main scanning direction and two or more bits in a sub scanning direction.

An information recording apparatus comprising:

• memory means for temporarily storing a part of bit information from bit information generated by a bit information generator;
• feature detecting means for detecting whether the part of bit information stored in said memory means coincides with one predetermined feature of predetermined plural features;
• information modifying means for modifying print information of an object pixel which corresponds to a bit in the part of bit information stored in said memory means, in a case where said feature detecting means detects coincidence with said one predetermined feature of the predetermined plural features;
• and
• recording means for modulating a light beam into signals corresponding to sub pixels smaller than the part of bit information stored in said memory means, according to the print information obtained from said information modifying means;
• wherein said information modifying means discriminates, on bit information for a line of one bit width, whether line width in a flexed portion of said line is at least one bit wide or less than one bit wide, and also varies how print information is modified according to the discrimination.

An information recording apparatus comprising:

• memory means for temporarily storing a part of bit information from bit information generated by a bit information generator;
• feature detecting means for detecting whether the part of bit information stored in said memory means coincides with one predetermined feature of predetermined plural features;
• information modifying means for modifying print information of an object pixel which corresponds to a bit in the part of bit information stored in said memory means, in a case where said feature detecting means detects coincidence with said one predetermined feature of the predetermined plural features;
• and
• recording means for modulating a light beam into signals corresponding to sub pixels smaller than the part of bit information stored in said memory means, according to the print information obtained from said information modifying means;
• wherein said information modifying means inhibits modification of the print information on a white line with one bit line width.

An information recording apparatus comprising:

• memory means for temporarily storing a part of bit information from bit information generated by a bit information generator;
• first feature detecting means for detecting whether the part of bit information stored in said memory means coincides with one feature of plural features each representative of an edge;
• second feature detecting means for detecting whether the part of bit information stored in said memory means has a right-angle portion;
• information modifying means for modifying print information of an object pixel which corresponds to a bit in the part of bit information stored in said memory means, in a case where both said first feature detecting means detects coincidence with said one feature of the plural features each representative of an edge and said second feature detecting means does not detect a right-angle portion;
• and
• recording means for modulating a light beam into signals corresponding to sub pixels smaller than the part of bit information stored in said memory means, according to the print information obtained from said information modifying means.

An information recording method comprising:

• a generation step of generating bit information;
• a storage step of temporarily storing a part of bit information from the bit information generated in said generation step;
• an extraction step of extracting predetermined plural areas from the part of bit information stored in said storage step, each area consisting of plural bit information;
• a feature extraction step of extracting a feature of plural bit information for each of the plural areas;
• a feature matching step of detecting whether or not the part of bit information stored in said storage step coincides with one predetermined feature of predetermined plural features;
• a judgement step of judging whether or not the part of bit information stored in said storage step is bit information for a half-tone image, based on the plural bit information for each of the plural areas;
• and
• an information modification step of modifying print information of an object pixel which corresponds to a bit in the part of bit information stored in said storage step, in a case where said feature matching step detects a coincidence with said one predetermined feature of the predetermined plural features and said judgement step judges that the part of bit information stored in said storage step is not bit information for a half-tone image.