A method is provided for scaling a source image to produce a destination image. According to the method, a local context metric is calculated from a local portion of the source image. A convolution kernel is generated from a plurality of available convolution kernels based on the calculated local context metric, and the generated convolution kernel is used to generate at least one pixel in the destination image. Also provided is an image scaling device that receives pixels of a source image and ...

An image pattern control system of the type having a dynamic memory which operates during a first period to read and rewrite the contents of memory according to address data sent from an address register and to refresh stored data according to the output of a refresh counter during a subsequent second period. The first and second periods are switched according to the output of a zoom ratio hold register.

A video display memory expansion system for expanding the graphics memory within the video display. The memory expansion system is suited for increasing the resolution of a graphics display from a low-resolution to a high-resolution display. A video display device is adapted to receive a relatively simple graphics memory expansion accessory to thereby easily and inexpensively provide the increased graphics memory capability.

According to the prior art, the image data expanded in the image memory is read out for display of an expanded picture image so that not only an additional memory capacity has been required for the expanded display but also it takes a considerable time to expand. According to the invention, there is provided a control device for output a horizontal synchronizing signal once in a number of cycles. In response to this modified horizontal synchronizing signal, image data is read out of the image me...

A high speed data display routine used in imaging of displays of geographic or other detail depicting, for example, the depth of an ocean, acoustic prediction plots, photographs and logos. The speed is achieved by a process for efficiently mapping the data values to the display matrix. The information processing uses proportional mapping, but only on the two edges of the data matrix. The processing performs substantially fewer calculations during the mapping process, by rely in accordance with c...

In computer image generation (CIG) systems, image data for defining pixel modulation values and for supporting a display having a predetermined resolution are determined for defining a scene. For some applications, such as for representing background and/or peripheral areas, it may be acceptable to use data having a lower resolution than the predetermined resolution. Method and apparatus for taking a portion of the image data obtain derived data by a predetermined combination of the portion of i...

A system for creating high resolution video images for later use in printing or the like. The operator draws with a stylus on a touch tablet (28) and video signals are processed to produce a high resolution image corresponding to what is drawn, the signals being stored in a high resolution store (25). While the processing of the signals progresses certain signals are copied to a lower resolution viewing store (26) and these signals read to a display (27) where the image can be viewed by the oper...

A video graphics controller circuit for a personal computers includes a standard, EGA-compatible graphics adapter and a high-resolution companion module. A method is disclosed for configuring the graphics adapter is to generate 2 pixels in parallel in each clock cycle. The companion module serializes the pixels to generate a serial stream of pixels at twice the frequency of the graphics adapter. The companion module can also be configured as a video line driver so that the graphics controller ci...

A method of and an apparatus for displaying a plurality of screen modes. The apparatus includes a synchronizing signal generator for generating a synchronizing signal for one screen mode, a display region correcting device for determining region correction values to display, within an image display region for the one screen mode, an image display region for any one of the plurality of screen modes including the one screen mode, a display region signal generator and a display device. The pluralit...

A display terminal control system applied to an image information terminal is disclosed, which includes a system control circuit, a display control circuit having a display buffer memory, the operation thereof being managed by the system control circuit, a coupler connected to the system control circuit for coupling the image information terminal to a data center and a keyborard connected to the system control circuit, wherein the keyboard has a multi-image control key which enables a multi-imag...