Abstract: A data processing apparatus for generating a desired color image by use of an easy user interface. The user interface includes a screen and an input apparatus having at least a pointer control apparatus. The pointer control apparatus is used for controlling the position of a pointer on the screen, coloring the pointer in a first color in response to the input apparatus, moving the pointer to a desired position on the screen in response to the pointer control apparatus, and changing the color of an area pointed by the pointer, in response to the input apparatus, into the color which is under the influence of the first color.

Abstract: In an initial set up sequence, N pels of an original image are stored in N memory positions of an input buffer. The N pels are converted to M pels, which are stored in M memory positions of an output buffer, where M and N are integers larger than 0. In the case of N<M, an enlargement of the original image is made, and in the case of N>M, a reduction of the original image is made. An address counter pointing to an address of a memory position of the input buffer is initially reset to 0. An address counter pointing to an address of the memory position of the output buffer is also reset to 0. The values -N, M, and an initial sum value S (where S is integer satisfying -N.ltoreq.S<M) are initially stored in three registers, respectively. The initially stored sum value S is repeatedly updated to control the scaling up operations or the scaling down operations. There is a first device which determines or checks whether the sum value is negative, or not.

Abstract: An image processing apparatus and method is disclosed for rapidly rotating images through selected angles by first generating each pel row of a scaled version of an original image in response to scaling values determined by the rotation angle selected; then performing horizontal shear and vertical shear operations, in response to values of horizontal and vertical shears determined by the selected rotation angle, and generating addresses in an output image memory into which the first pels of the pel rows of the scaled image are to be stored; in response to the value of vertical shear and the address of the first pel of each respective row, generating respective lines of addresses in the output memory into which all the remaining pels of each respective pel row of the scaled image are to be stored; and finally storing all the pels of the pel rows in the generated addresses of the output image memory.

Abstract: A system for processing image data of a text document in compressed form wherein pel signals of the original image are stored in pel positions in an input image buffer and the pel signals stored in every other pel (EOP) positions in the input buffer are sequentially fetched, along with respective pluralities of neighboring pel signals stored in EOP positions and compressed by adaptive arithmetic compression to generate a first set of compressed data which is stored in a memory. The pel signals stored in remaining pel (RP) positions in the input image buffer are also sequentially fetched, along with respective pluralities of neighboring pel signals, including at least one signal stored in an RP position and a plurality of signals stored in EOP positions, and compressed by adaptive arithmetic compression to generate a second set of compressed data which is stored in a memory.

Abstract: An image processing system to allow communication with input and output devices having varying resolutions. An image processing system converts an image into a compressed base image and successive levels of error correction data so that an output of the image may be provided with any desired level of resolution (up to that of the input) with further levels of resolution obtained through predictive techniques. Advantageously, the error coding data is arithmetically coded.