Abstract: An image forming apparatus includes: a first holding unit that holds a pixel value data sequence in which each of the data sequences is formed by a pixel value and a range of the pixel value or by the pixel value, the range of the pixel value, reference to a pixel, and a range of the reference; a second holding unit that holds a transparency data sequence in which each of the one-dimensional data sequences is formed by a coefficient representing transparency of a pixel in the image element and a range of the coefficient or by the coefficient, the range of the coefficient, reference to coefficient, and a range of the reference; and an image generation unit that forms an image from the pixel value data sequence, and that generates information about transparency of the image from the transparency data sequence.

Abstract: An image processing apparatus includes: an accepting unit that accepts image information about each of a plurality of image elements to be synthesized; a comparing unit that compares a threshold value with a mixing ratio used in an operation to synthesize the image information according to a given mixing ratio; and a setting unit that sets an attribute of an image element in an area where the plurality of image elements are overlapped with each other synthesized according to a comparison result obtained by the comparing unit.

Abstract: An image processing apparatus for generating scaled image data includes a receiver that receives an input of pixel value information of each pixel which is contained in image data to be processed in raster scan order, a first memory that stores the pixel value information input in the raster scan order, a destination address generator that generates destination address information in the second memory to specify a destination location of the pixel value information stored in the first memory in response to the specified scaling factor, and a transferring unit that transfers the pixel value information from the first memory to the second memory based on the generated destination address information.

Abstract: An image forming apparatus includes: a first holding unit that holds a pixel value data sequence in which each of the data sequences is formed by a pixel value and a range of the pixel value or by the pixel value, the range of the pixel value, reference to a pixel, and a range of the reference; a second holding unit that holds a transparency data sequence in which each of the one-dimensional data sequences is formed by a coefficient representing transparency of a pixel in the image element and a range of the coefficient or by the coefficient, the range of the coefficient, reference to coefficient, and a range of the reference; and an image generation unit that forms an image from the pixel value data sequence, and that generates information about transparency of the image from the transparency data sequence.

Abstract: An image processing apparatus includes: an accepting unit that accepts image information about each of a plurality of image elements to be synthesized; a comparing unit that compares a threshold value with a mixing ratio used in an operation to synthesize the image information according to a given mixing ratio; and a setting unit that sets an attribute of an image element in an area where the plurality of image elements are overlapped with each other synthesized according to a comparison result obtained by the comparing unit.

Abstract: An image processing apparatus for generating scaled image data includes a receiver that receives an input of pixel value information of each pixel which is contained in image data to be processed in raster scan order, a first memory that stores the pixel value information input in the raster scan order, a destination address generator that generates destination address information in the second memory to specify a destination location of the pixel value information stored in the first memory in response to the specified scaling factor, and a transferring unit that transfers the pixel value information from the first memory to the second memory based on the generated destination address information.