Image processing method and apparatus
AssigneeCanon Kabushiki Kaisha
InventorsMichiaki Takasaka, Hisashi Ishikawa
Life of this patent
Estimating the term…
Abstract
An image processing apparatus stores, in a buffer, an image data of c bits in the main scanning direction and y lines in the sub scanning direction, and reads out a pixel data of p bits that configures the image data stored in the buffer, in accordance with the completion of the storage of the image data. Note that c is a common multiple of m, which is the number of bits in the unit of memory access, and p, which is the number of bits in a single pixel. Note further that the number of bits in the unit of memory access m is not itself a multiple of the number of bits in a single pixel p.
Claims12
An image processing method configured to store, in a buffer, an image data of a prescribed bit quantity in a main scanning direction and a prescribed line quantity in a sub scanning direction, and to read out the image data stored in the buffer, the method comprising:
- storing, in the buffer, an image data of a quantity of c bits in a main scanning direction, wherein c is a common multiple of a number of bits m of a unit of memory access and a number p of bits in a single pixel, and the number of bits m of the unit of memory access is not a multiple of the number p of bits in the single pixel, and a quantity of y lines in a sub scanning direction;
- and
- reading out a pixel data, in the sub scanning direction, of p bits that configure the image data stored in the buffer, in response to a completion of the storage of the image data of the quantity of c bits in the main scanning direction and the quantity of y lines in the sub scanning direction.
An image processing apparatus configured to store, in a buffer, an image data of a prescribed bit quantity in a main scanning direction and a prescribed line quantity in a sub scanning direction, and to read out the image data stored in the buffer, the apparatus comprising:
- a storage unit configured to store, in the buffer, an image data of a quantity of c bits in a main scanning direction, wherein c is a common multiple of a number of bits m of a unit of memory access and a number p of bits in a single pixel, and the number of bits m of the unit of memory access is not a multiple of the number p of bits in the single pixel, and a quantity of y lines in a sub scanning direction;
- and
- a readout unit configured to read out a pixel data, in the sub scanning direction, of p bits that configure the image data stored in the buffer, in response to a completion of the storage of the image data of the quantity of c bits in the main scanning direction and the quantity of y lines in the sub scanning direction.
A recording medium configured to store a computer program configured to execute an image process configured to store, in a buffer, an image data of a prescribed bit quantity in a main scanning direction and a prescribed line quantity in a sub scanning direction, and to read out the image data stored in the buffer, the computer program comprising:
- storing, in the buffer, an image data of a quantity of c bits in a main scanning direction, wherein c is a common multiple of a number of bits m of a unit of memory access and a number p of bits in a single pixel, and the number of bits m of the unit of memory access is not a multiple of the number p of bits in the single pixel, and a quantity of y lines in a sub scanning direction;
- and
- reading out a pixel data, in the sub scanning direction, of p bits that configure the image data stored in the buffer, in response to a completion of the storage of the image data of the quantity of c bits in the main scanning direction and the quantity of y lines in the sub scanning direction.
Dependencies are inferred from the claim text.