If pixel segment insertion/extraction control by random number control which is uniform irrespective of a type of image data is performed, in the case of a character or diagram, main scanning positions where the pixel-segment insertion/extraction is executed become discontinuous in a sub-scanning direction, and image quality deteriorates. To solve the above problem, there is provided an image forming apparatus having: a unit for dividing an image into a plurality of areas in the main scanning direction; a unit for setting a reference area for performing pixel segment insertion/extraction control in each of divided areas; and a unit for deciding a position where the pixel segment insertion/extraction control in each of the divided area, in accordance with attribute information of image data in the set reference area.

Claims

10 · 3 independent · depth 3

10 granted claims

›1.independentAn image forming apparatus comprising:na scanning unit configured to scan an image in a main scanning direction by a laser beam;a clock output unit co…+6

›2.↳ 1The apparatus according to claim 1, wherein the reference area set by the setting unit is an area of one precedent line belonging to each of the divid…d2

›3.↳ 1The apparatus according to claim 1, wherein the reference area set by the setting unit is an area having a width of a plurality of lines in a sub-scan…d2

›4.↳ 1The apparatus according to claim 1, wherein the reference area set by the setting unit is an area having a width of a plurality of lines in a sub-scan…d2

›5.↳ 1The apparatus according to claim 1, wherein the decision by the deciding unit is based on a count value or ratio of the attribute information of the p…d2

›6.↳ 1The apparatus according to claim 1, wherein the deciding unit is further configured to decide whether the pixel segments which are inserted/extracted …d2+1

›8.independentAn image forming method carried out in an image forming apparatus, wherein the apparatus comprises:na scanning unit configured to scan an image in a m…+1

›10.independentAn image forming apparatus comprising:na dividing unit configured to divide an image into a plurality of divided areas in a main scanning direction;a …

Classifications

6 codes

IPC · International Patent Classification

Section B — Performing operations; transporting

B41J2/47

Section G — Physics

G06K15/02
G06K15/12

USPC · US Patent Classification

358/1.13358/1.15358/1.16

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Pendency

2.9 y

1,043 days filing → grant

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non-final + final

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1 RCE

Examiner

Darryl V Dottin

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20120147403 A1	14 Jun 2012

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