Seiko Epson Corporation

Brett Anthony Cheng

Barinder Singh Rai

Lawrence P Chee

Eric Jeffrey

Juraj Bystricky

David M Tucker

Kevin Gillett

A method and circuit for excluding regions from an exposure calculation is described. The method includes obtaining pre-image data representing an image of a scene and dividing the image into a plurality of regions. Regions that contain a predetermined number of bright pixels are identified, bright pixels being pixels that are brighter than a threshold level of brightness. Each region that has at least the predetermined number of bright pixels from the exposure calculation are excluded.

Backlight compensation using threshold detection

A digital imaging device is operated to capture a first image in a digital format. At least two non-contiguous portions of the first image are rendered in a display of the digital imaging device. The at least two non-contiguous portions of the first image are used to align a live version of a second image in the display, wherein the second image is an extension of the first image. The second image is captured in a digital format. A corner matching algorithm is applied to determine an offset of the second image with respect to the first image, wherein the offset is required to achieve a substantially accurate alignment of the first and second images. Application of the corner matching algorithm is limited to an overlap region intervening between the at least two non-contiguous portions of the first image.

Method for digital image stitching and apparatus for performing the same

A system for translating a portrait-oriented software address to a portrait-oriented yet landscape-configured display address. Based on the orientation of a display device, an address translation system either passes the software address 'as is' or translates the address to represent a portrait-oriented display address. A refresh address generator operates alternatively in column-forward and column-reverse modes, and additionally operates alternatively in row forward and row reverse modes to selectively rotate the image.

Display apparatus and method capable of rotating an image

A method of producing an adaptive partial ink layer for a pen based computing device is described. The adaptive partial ink layer is used to form an ink trail, which follows the input pen as it moves in contact with a touch screen. This allows the user to view the input while it is being made, which allows the input to be improved through the visual observation. A three-cell block is formed to permit single character input from the pen and then the block is extended in the direction of a cursive input to accommodate a word or phrase. Whereas, a common direction for the cursive input is from left to right, any direction emanating from the three cell block can be used if the interpreter of the pen passed computing device is set up to allow such an input.

Method to implement an adaptive-area partial ink layer for a pen-based computing device

A method for creating an ink-trail and implementing a partial ink layer in a pen based computing apparatus is described. The partial ink layer, which is smaller than a display window of a computing apparatus, is located at a starting address with a shape and size that fits within the display widow. An ink trail is created within the ink layer that simulates ink flowing from the pen to paper while a character, or several cursive characters, is formed by the pen while touching a touch screen overlaying the display screen of the computing apparatus. The ink trail is erased when the pen is removed from the touch screen. The bit depth of the pixels in the partial ink layer are less than for the pixels of the main display and can be as few as 2, which includes a transparency bit.

Method for implementing a partial ink layer for a pen-based computing device

A system for translating a portrait-oriented software address to a portrait-oriented yet landscape-configured display address. Based on the orientation of a display device, a address translation system either passes the software address &ldquo;as is&rdquo; or translates the address to represent a portrait-oriented display address.

Display apparatus and method capable of rotating an image by 180 degrees

A central processing unit (,) in a display system carries pixel-value signals and software-address signals representing the locations of the pixels whose values the pixel-value signals represent. An address-translation circuit (,) converts those software addresses to logical addresses representing the locations of those pixels in a 90&deg;-rotated version of the image that the software address signals represent, and the logical addresses are applied to an image-buffer memory (,) to specify the locations in which to store the pixel values. A refresh-address circuit (,) generates the address signals used in fetching from the image-buffer memory (,) the values that are applied to a display device (,) employed to display the image. The refresh-address generator (,) is operable alternatively in row-forward and row-reverse modes and alternatively in column-forward and column-reverse modes. The addresses represent a sequence of columns across rows and rows across an image, and the column addresses increase within a row in the column-forward mode but decrease in the column-reverse mode. The addresses increase between rows in the row-forward mode and decrease in the row-reverse mode. The effect of the different modes is to compensate for reversals such as mirror-image scans and to convert the 90&deg; rotation between clockwise and counterclockwise.

A system for translating a portrait-oriented software address to a portrait-oriented yet landscape-configured display address. The system includes a central processing unit (CPU), a display device and an address translation system. The CPU generates a software address. Based on the orientation of the display device, the address translation system either passes the software address 'as is' or translates the address to represent a portrait-oriented display address. The address translation system translates according to the functions L=in (H.sub.D)/in 2 and M=in (W.sub.D)/in 2, wherein H.sub.D is the landscape-oriented display device pixel height and W.sub.D is the landscape-oriented display device pixel width. L represents the number of least significant software address bits to translate as most significant physical address bits, and M represents the number of most significant software address bits to invert and translate as least significant physical address bits. The resulting address represents a pixel location on the display device which has been rotated counter-clockwise ninety degrees for portrait orientation.

Hardware that rotates an image for portrait-oriented display

A computer system includes an operator input device, a central processing unit (CPU), and a display device, such as a liquid crystal display (LCD) or cathode ray tube (CRT) providing a visible image to the computer user as an output of computer activity. The computer system includes a video display controller (VDC) with a graphics generator. This VDC receives image information, such as text or graphics generated by the CPU, or retrieved by the CPU from another facility (such as a CD-ROM) of the computer system, and responsively provides image signals driving the CRT or LCD display. The VDC includes a power saving controller implementing one of several available power saving modes dependent upon one or more of several possible inputs. Each of the power saving modes includes the same list of VDC functions which may individually be enabled or disabled in each power saving mode dependent upon a bit value entered into a register of the power saving controller. Each of the power saving modes is ranked with the others in an order of succession. Accordingly, when each mode of power saving is enabled, it disables the lower-ranked modes of power saving. In turn, each mode of power saving is disabled and succeeded if a higher-ranked mode is enabled.

Computer system with video display controller having power saving modes

A system for translating a portrait-oriented software address to a portrait-oriented yet landscape-configured display address. The system includes a central processing unit (CPU), a display device and an address translation system. The CPU generates a software address. Based on the orientation of the display device, the address translation system either passes the software address 'as is' or translates the address to represent a portrait-oriented display address. The address translation system translates according to the functions L=ln(H.sub.D)/ln 2 and M=ln(W.sub.D)/ln 2, wherein H.sub.D is the landscape-oriented display device pixel height and W.sub.D is the landscape-oriented display device pixel width. L represents the number of least significant software address bits to translate as most significant physical address bits, and M represents the number of most significant software address bits to invert and translate as least significant physical address bits. The resulting address represents a pixel location on the display device which has been rotated counter-clockwise ninety degrees for portrait orientation.

Growing community of inventors

Vancouver, Canada

Brett Anthony Cheng