Abstract: An image recording apparatus records a plurality of measuring patterns on a recording medium. Each measuring pattern is constituted by dots spaced from one another on the recording medium, or by dots contacting one another, forming lines spaced from one another on the recording medium. Further, the measuring patterns have gravity centers are almost identical in position on the recording medium. Hence, the relative record shifts of the measuring patterns recorded by recording element arrays, respectively, can be decreased.

Abstract: An image forming apparatus performs an image forming operation by driving a ejecting element of a recording head with an ink ejecting drive voltage for ejecting ink, detects a temperature of ink to be flown into the recording head and a temperature of ink to be discharged respectively with a first temperature detection section and a second temperature detection section, and corrects the ink ejecting drive voltage on the basis of a temperature of ink being heat-transferred with the ejecting element, which is estimated with a predetermined conversion formula on the basis of the detected ink temperatures, for controlling an ink amount to be ejected.

Abstract: Disclosed is a method for correcting unevenness in density. An image density and presence or absence of a miss fire of ink is detected from an inspection pattern recorded by an image recording apparatus. Density information of a nozzle causing a miss fire of ink is substituted with density information of a nozzle existing in the periphery of the nozzle causing a miss fire of ink.

Abstract: An image recording apparatus records a plurality of measuring patterns on a recording medium. Each measuring pattern is constituted by dots spaced from one another on the recording medium, or by dots contacting one another, forming lines spaced from one another on the recording medium. Further, the measuring patterns have gravity centers are almost identical in position on the recording medium. Hence, the relative record shifts of the measuring patterns recorded by recording element arrays, respectively, can be decreased.

Abstract: An image forming apparatus performs an image forming operation by driving a ejecting element of a recording head with an ink ejecting drive voltage for ejecting ink, detects a temperature of ink to be flown into the recording head and a temperature of ink to be discharged respectively with a first temperature detection section and a second temperature detection section, and corrects the ink ejecting drive voltage on the basis of a temperature of ink being heat-transferred with the ejecting element, which is estimated with a predetermined conversion formula on the basis of the detected ink temperatures, for controlling an ink amount to be ejected.