Image processing apparatus, method of controlling the same, and storage medium

A method of controlling image processing in an image processing apparatus including a directivity image processing unit that performs image processing for processing target pixel data, using either pixel values of pixel data which have been input before the processing target pixel data, or a result of processing the pixel data, a plurality of image processing units that perform image processing on the pixel data, and a first storage and a second storage that store image data, the method comprising:

• reading pixel data, corresponding to a pixel of image indicated by the image data, of the image data from the first storage or the second storage, and outputting the pixel data to an image processing unit of the plurality of image processing units;
• and
• writing the pixel data processed by the plurality of image processing units into the second storage, wherein the writing performs write processing to write the processing target pixel data processed by the directivity image processing unit into the second storage in an order of arrangement which is reversed with respect to the order of arrangement of pixels in the image data read out from the first storage so that in a case that the pixel data written into the second storage is read from the second storage in the reading, the reading is performed in an order which is reversed with respect to an order used when the pixel data was read from the first storage;
• and
• performing, for the directivity image processing unit, image processing on the image data in mutually different directions by reading and supplying to an image processing unit of the plurality of image processing units, the pixel data written into the second storage,
• wherein image processing by the directivity image processing unit is executed multiple times on the processing target pixel data, and image processing for the processing target pixel data by an image processing unit excluding the directivity image processing unit among the plurality of image processing units is performed only once,
• wherein the directivity image processing unit executes image processing that corrects variation of recording density due to variation of ink density dependent on scanning of a recording head for recording an image on a recording medium based on the pixel data which have been applied to the image processing by the one or more of the plurality of image processing units, in accordance with a scanning direction of the recording head, and
• wherein the directivity image processing unit executes filter processing that depends on the direction of arrangement of the pixels in the image data read out by the reading unit.

A non-transitory computer-readable storage medium storing a program for causing a processor to execute a method of controlling image processing in an image processing apparatus including a directivity image processing unit that performs image processing for processing target pixel data, using either pixel values of pixel data which have been input before the processing target pixel data, or a result of processing the pixel data, a plurality of image processing units that perform image processing on the pixel data, and a first storage and a second storage that store image data, the method comprising:

• reading pixel data, corresponding to a pixel of image indicated by the image data, of the image data from the first storage or the second storage, and outputting the pixel data to an image processing unit of the plurality of image processing units;
• and
• writing the pixel data processed by the plurality of image processing units into the second storage, wherein the writing performs write processing to write the processing target pixel data processed by the directivity image processing unit into the second storage in an order of arrangement which is reversed with respect to the order of arrangement of pixels in the image data read out from the first storage so that in a case that the pixel data written into the second storage is read from the second storage in the reading, the reading is performed in an order which is reversed with respect to an order when the pixel data was read from the first storage;
• and
• performing, for the directivity image processing unit, image processing on the image data in mutually different directions by reading and supplying to an image processing unit of the plurality of image processing units, the pixel data written into the second storage,
• wherein image processing by the directivity image processing unit is executed multiple times on the processing target pixel data, and image processing for the processing target pixel data by an image processing unit excluding the directivity image processing unit among the plurality of image processing units is performed only once,
• wherein the directivity image processing unit executes image processing that corrects variation of recording density due to variation of ink density dependent on scanning of a recording head for recording an image on a recording medium based on the pixel data which have been applied to the image processing by the one or more of the plurality of image processing units, in accordance with a scanning direction of the recording head, and
• wherein the directivity image processing unit executes filter processing that depends on the direction of arrangement of the pixels in the image data read out by the reading unit.