Method and apparatus for processing image

Claim 2

An image processing apparatus comprising: pixel data generating means for generating density data representing a density of each pixel of original image data and color data representing a color of each pixel, the density and color data being parallel data; mode setting means for outputting a mode setting signal for setting a write mode and a read mode; memory means capable of being arbitrarily set in the write mode and the read mode in response to the mode setting signal, said memory means being operated such that a memory content is changed in correspondence with the density data and the color data in the write mode and that a memory content corresponding to the color data externally accessed is read out in the read mode; threshold value setting means for setting threshold values in units of color data on the basis of the memory content read out from said memory means in the read mode; recording density data forming means for forming recording density data having a smaller number of bits by the set threshold values on the basis of the density data; and recording means for performing recording on the basis of the recording density data.

Claim 3

An image processing apparatus comprising: pixel data generating means for generating density data representing a density of each pixel of original image data and color data representing a color of each pixel, the density and color data being parallel data; mode setting means for outputting a mode setting signal for setting a write mode and a read mode; memory means capable of being arbitrarily set in the write mode and the read mode in response to the mode setting signal, said memory means being operated such that, in the write mode, said memory is addressed by the density data and the color data and data stored at an accessed address is incremented, and, in the read mode, all addresses corresponding to one of the color data which is externally accessed are accessed and data stored at the accessed addresses are read out; control data forming means for forming control data on the basis of a series of data read out from said memory means in the read mode; and processing means for processing the density data on the basis of the control data.

Claim 4

An image processing apparatus comprising: pixel data generating means for generating density data representing a density of each pixel of original image data and color data representing a color of each pixel, the density and color data being parallel data; mode setting means for outputting a mode setting signal for setting a write mode and a read mode; memory means capable of being arbitrarily set in the write mode and the read mode in response to the mode setting signal, said memory means being operated such that, in the write mode, said memory is addressed by the density data and the color data and data stored at an accessed address is incremented, and, in the read mode, all addresses corresponding to one of the color data which is externally accessed are accessed and data stored at the accessed addresses are read out; control data forming means for forming control data on the basis of a series of data read out from said memory means in the read mode; and processing means for processing the density data on the basis of the control data.

Claim 5

An apparatus according to claim 2, wherein said control data forming means reads out data corresponding to a plurality of color data from said memory means, adds the readout data, and forms the control data on the basis of the sum.

Claim 6

An image processing apparatus comprising: image reading means consisting of a plurality of linear photoelectric transducer elements and an optical system for simultaneously forming an optical image from a document onto said plurality of photoelectric transducer elements, said plurality of photoelectric transducer elements being arranged to perform a main scan of the document and a subscan of the document at a speed corresponding to a designated magnification in a direction perpendicular to a direction of the main scan, so that each of said photoelectric transducer elements outputs a read signal in units of scan lines; pixel data generating means for generating density data representing a density of each pixel of original image data and color data representing a color of each pixel, the density and color data being parallel data; mode setting means for outputting a mode setting signal for setting a write mode and a read mode; memory means capable of being arbitrarily set in the write mode and the read mode in response to the mode setting signal, said memory means being operated such that, in the write mode, said memory is addressed by the density data and the color data and data stored at an accessed address is incremented, and, in the read mode, all addresses corresponding to one of the color data which is externally accessed are accessed and data stored at the accessed addresses are read out; threshold value setting means for setting threshold values in units of color data on the basis of the memory content read out from said memory means in the read mode; recording density data forming means for forming recording density data having a smaller number of bits by the set threshold values on the basis of the density data; and recording means for performing recording on the basis of the recording density data.

Claim 7

An image processing apparatus comprising: image reading means consisting of a plurality of linear photoelectric transducer elements and an optical system for simultaneously forming an optical image from a document onto said plurality of photoelectric transducer elements, said plurality of photoelectric transducer elements being arranged to perform a main scan of the document and a subscan of the document at a speed corresponding to a designated magnification in a direction perpendicular to a direction of the main scan, so that each of said photoelectric transducer elements outputs a read signal in units of scan lines; pixel data generating means for generating density data representing a density of each pixel of original image data and color data representing a color of each pixel, the density and color data being parallel data; mode setting means for outputting a mode setting signal for setting a write mode and a read mode; memory means capable of being arbitrarily set in the write mode and the read mode in response to the mode setting signal, said memory means being operated such that, in the write mode, said memory is addressed by the density data and the color data and data stored at an accessed address is incremented, and, in the read mode, all addresses corresponding to one of the color data which is externally accessed are accessed and data stored at the accessed addresses are read out; threshold value setting means for setting threshold values in units of color data on the basis of the memory content read out from said memory means in the read mode; recording density data forming means for forming recording density data having a smaller number of bits by the set threshold values on the basis of the density data; and recording means for performing recording on the basis of the recording density data.