US7719536B2 — Glyph adjustment in high resolution raster while …

Claim 1

Independent Claim 166 words

A method comprising: receiving a glyph for display at a size on a raster output device; receiving a grid ratio, the grid ratio specifying an integer number of fine pixels of a high resolution grid that correspond to a device pixel of a raster of the output device; rendering, with one or more computers, the glyph at the size on the high resolution grid, the high resolution grid including fine pixels marked to represent the glyph and fine pixels that are unmarked; determining, with the one or more computers, for each line of pixels of the high resolution grid in a particular direction, a line-specific, per-transition adjustment number, the line-specific, per-transition adjustment number determined from a scaled stem width for the glyph; and in each line of pixels of the high resolution grid, marking or erasing the line-specific, per-transition adjustment number of fine pixels in the high resolution grid at each transition from a marked fine pixel to an unmarked fine pixel in the particular direction.

Claim 2

Independent Claim 166 words

A method comprising: receiving a glyph for display at a size on a raster output device; receiving a grid ratio, the grid ratio specifying an integer number of fine pixels of a high resolution grid that correspond to a device pixel of a raster of the output device; rendering, with one or more computers, the glyph at the size on the high resolution grid, the high resolution grid including fine pixels marked to represent the glyph and fine pixels that are unmarked; determining, with the one or more computers, for each line of pixels of the high resolution grid in a particular direction, a line-specific, per-transition adjustment number, the line-specific, per-transition adjustment number determined from a scaled stem width for the glyph; and in each line of pixels of the high resolution grid, marking or erasing the line-specific, per-transition adjustment number of fine pixels in the high resolution grid at each transition from a marked fine pixel to an unmarked fine pixel in the particular direction.

Claim 3

Dependent Claim 88 words

The method of claim 1 , wherein the glyph is associated with a font, and wherein determining the line-specific, per-transition adjustment number includes: obtaining a standard stem width of the font; calculating the scaled stem width for the glyph by scaling the standard stem width to the size at which the glyph is to be displayed on the raster output device; calculating an adjustment number from the scaled stem width; and determining the integer line-specific, per-transition adjustment number, the determining being based at least on the adjustment number.

Claim 4

Dependent Claim 86 words

The method of claim 2 , wherein determining the integer line-specific, per-transition adjustment number includes: defining a pattern of the adjustment number of fine pixels for distribution among lines of fine pixels of the high resolution grid; and using the pattern to select, for each line of fine pixels of the high resolution grid in the particular direction, the integer number of fine pixels to be marked or erased at each transition from a marked fine pixel to an unmarked fine pixel in a particular direction.

Claim 5

Dependent Claim 43 words

The method of claim 3 , wherein: the pattern is a form of dithering in which the line-specific, per-transition adjustment number does not vary by more than one fine pixel from one line of fine pixels to a next line of fine pixels.

Claim 6

Dependent Claim 37 words

The method of claim 2 , wherein: the calculating of the adjustment number is based on one of a function for providing synthetic bold, a function for providing synthetic light, or a function for providing optical compensation.

Claim 7

Dependent Claim 50 words

The method of claim 5 , wherein: the function for providing synthetic bold and the function for providing synthetic light each defines a linear relationship between adjustment number and scaled stem width; and the function for optical compensation defines an inversely proportional relationship between adjustment number and scaled stem width.

Claim 8

Dependent Claim 61 words

The method of claim 2 , wherein calculating an adjustment number includes: calculating a component for producing a synthetic bold appearance or a synthetic light appearance; calculating a component for optical compensation, the calculating of the component for optical compensation accounting for the component for producing a bold appearance or the component for producing the synthetic light; and combining the components.

Claim 9

Dependent Claim 171 words

The method of claim 2 , wherein the grid ratio specifies a number of rows of fine pixels that correspond to a height of the device pixel, wherein the line of fine pixels is a row in the high resolution grid, and wherein the adjustment number determined based on the scaled stem width is a first adjustment number, the method further comprising: calculating a second adjustment number by dividing the first adjustment number by the number of rows of fine pixels corresponding to the height of the device pixel; when the second adjustment number is not an integer, selecting two integers that delimit the second adjustment number; defining a pattern of a number of instances of the two integers, a sum of values of the instances in the pattern equaling the first adjustment number, the number of instances equaling the number of rows of fine pixels corresponding to the height of the device pixel; and selecting, based on the pattern, one of the two integers as the line-specific, per-transition adjustment number.

Claim 10

Dependent Claim 58 words

The method of claim 1 , wherein obtaining the integer number includes: calculating an adjustment number from the size at which the glyph is to be displayed, wherein the size is expressed as either points per em or pixels per em; and determining the line-specific, per-transition adjustment number, the determining being based at least on the adjustment number.

Claim 11

Dependent Claim 20 words

The method of claim 1 , wherein: the high resolution grid is stored in a digital memory as a bitmap.

Claim 12

Dependent Claim 28 words

The method of claim 10 , wherein rendering the glyph includes: adding unmarked fine pixels to an edge of the bitmap to allow for the marking or erasing.

Claim 13

Dependent Claim 17 words

The method of claim 10 , further comprising: adjusting a bitmap metric after the marking or erasing.

Claim 14

Dependent Claim 27 words

The method of claim 1 , wherein: the marking or erasing are performed by a rasterizer during rendering, the rasterizer being a first component of a renderer.

Claim 15

Dependent Claim 18 words

The method of claim 13 , further comprising: downsampling the bitmap representing the adjusted version of the glyph.

Claim 16

Dependent Claim 22 words

The method of claim 13 , wherein: the downsampling is performed by a downsampler that is a second component of the renderer.

Claim 17

Dependent Claim 17 words

The method of claim 1 , where the particular direction of the line of pixels is vertical.

Claim 18

Dependent Claim 181 words

A computer-program product, tangibly stored on machine-readable storage medium, the product comprising instructions operable to cause a computing device to perform a method comprising: receiving a glyph for display at a size on a raster output device; receiving a grid ratio, the grid ratio specifying an integer number of fine pixels of a high resolution grid that correspond to a device pixel of a raster of the output device; rendering the glyph at the size on the high resolution grid, the high resolution grid including fine pixels marked to represent the glyph and fine pixels that are unmarked; determining for each line of pixels of the high resolution grid in a particular direction, a line-specific, per-transition adjustment number, the line-specific, per-transition adjustment number determined from a scaled stem width for the glyph; and in each line of pixels of the high resolution grid, marking or erasing the line-specific, per-transition adjustment number of fine pixels in the high resolution grid at each transition from a marked fine pixel to an unmarked fine pixel in a particular direction of the line of pixels.

Claim 19

Dependent Claim 181 words

A computer-program product, tangibly stored on machine-readable storage medium, the product comprising instructions operable to cause a computing device to perform a method comprising: receiving a glyph for display at a size on a raster output device; receiving a grid ratio, the grid ratio specifying an integer number of fine pixels of a high resolution grid that correspond to a device pixel of a raster of the output device; rendering the glyph at the size on the high resolution grid, the high resolution grid including fine pixels marked to represent the glyph and fine pixels that are unmarked; determining for each line of pixels of the high resolution grid in a particular direction, a line-specific, per-transition adjustment number, the line-specific, per-transition adjustment number determined from a scaled stem width for the glyph; and in each line of pixels of the high resolution grid, marking or erasing the line-specific, per-transition adjustment number of fine pixels in the high resolution grid at each transition from a marked fine pixel to an unmarked fine pixel in a particular direction of the line of pixels.

Claim 20

Dependent Claim 88 words

The product of claim 17 , wherein the glyph is associated with a font, and wherein determining the line-specific, per-transition adjustment number includes: obtaining a standard stem width of the font; calculating the scaled stem width for the glyph by scaling the standard stem width to the size at which the glyph is to be displayed on the raster output device; calculating an adjustment number from the scaled stem width; and determining the integer line-specific, per-transition adjustment number, the determining being based at least on the adjustment number.

Claim 21

Dependent Claim 86 words

The product of claim 18 , wherein determining the integer line-specific, per-transition adjustment number includes: defining a pattern of the adjustment number of fine pixels for distribution among lines of fine pixels of the high resolution grid; and using the pattern to select, for each line of fine pixels of the high resolution grid in the particular direction, the integer number of fine pixels to be marked or erased at each transition from a marked fine pixel to an unmarked fine pixel in a particular direction.

Claim 22

Dependent Claim 43 words

The product of claim 19 , wherein: the pattern is a form of dithering in which the line-specific, per-transition adjustment number does not vary by more than one fine pixel from one line of fine pixels to a next line of fine pixels.

Claim 23

Dependent Claim 37 words

The product of claim 18 , wherein: the calculating of the adjustment number is based on one of a function for providing synthetic bold, a function for providing synthetic light, or a function for providing optical compensation.

Claim 24

Dependent Claim 50 words

The product of claim 21 , wherein: the function for providing synthetic bold and the function for providing synthetic light each defines a linear relationship between adjustment number and scaled stem width; and the function for optical compensation defines an inversely proportional relationship between adjustment number and scaled stem width.

Claim 25

Dependent Claim 61 words

The product of claim 18 , wherein calculating an adjustment number includes: calculating a component for producing a synthetic bold appearance or a synthetic light appearance; calculating a component for optical compensation, the calculating of the component for optical compensation accounting for the component for producing a bold appearance or the component for producing the synthetic light; and combining the components.

Claim 26

Dependent Claim 172 words

The product of claim 18 , wherein the grid ratio specifies a number of rows of fine pixels that correspond to a height of the device pixel, wherein the line of fine pixels is a row in the high resolution grid, wherein the adjustment number determined based on the scaled stem width is a first adjustment number, and wherein the method further comprises: calculating a second adjustment number by dividing the first adjustment number by the number of rows of fine pixels corresponding to the height of the device pixel; when the second adjustment number is not an integer, selecting two integers that delimit the second adjustment number; defining a pattern of a number of instances of the two integers, a sum of values of the instances in the pattern equaling the first adjustment number, the number of instances equaling the number of rows of fine pixels corresponding to the height of the device pixel; and selecting, based on the pattern, one of the two integers as the line-specific, per-transition adjustment number.

Claim 27

Dependent Claim 57 words

The product of claim 17 , wherein obtaining the integer number includes: calculating an adjustment number from the size at which the glyph is to be displayed, wherein the size is expressed as either points pattern or pixels per em; and determining the line-specific, per-transition adjustment number, the determining being based at least on the adjustment number.

Claim 28

Dependent Claim 20 words

The product of claim 17 , wherein: the high resolution grid is stored in a digital memory as a bitmap.

Claim 29

Dependent Claim 28 words

The product of claim 26 , wherein rendering the glyph includes: adding unmarked fine pixels to an edge of the bitmap to allow for the marking or erasing.

Claim 30

Dependent Claim 20 words

The product of claim 26 , wherein the method further comprises: adjusting a bitmap metric after the marking or erasing.

Claim 31

Dependent Claim 28 words

The product of claim 17 , wherein: the marking or erasing are performed by a rasterizer during rendering, the rasterizer being a first component of a rendering engine.

Claim 32

Dependent Claim 21 words

The product of claim 29 , wherein the method further comprises: downsampling the bitmap representing the adjusted version of the glyph.

Claim 33

Dependent Claim 23 words

The product of claim 29 , wherein: the downsampling is performed by a downsampler that is a second component of the rendering engine.

Claim 34

Dependent Claim 17 words

The product of claim 17 , where the particular direction of the line of pixels is vertical.

Claim 35

Independent Claim 162 words

A system comprising: one or more computers configured to perform operations comprising: receiving a glyph for display at a size on a raster output device; receiving a grid ratio, the grid ratio specifying an integer number of fine pixels of a high resolution grid that correspond to a device pixel of a raster of the output device; rendering the glyph at the size on the high resolution grid, the high resolution grid including fine pixels marked to represent the glyph and fine pixels that are unmarked; determining, for each line of pixels of the high resolution grid in a particular direction, a line-specific, per-transition adjustment number, the adjustment number determined from a scaled stem width for the glyph; and in each line of pixels of the high resolution grid, marking or erasing the line-specific, per-transition adjustment number of fine pixels in the high resolution grid at each transition from a marked fine pixel to an unmarked fine pixel in the particular direction.

Claim 36

Independent Claim 162 words

A system comprising: one or more computers configured to perform operations comprising: receiving a glyph for display at a size on a raster output device; receiving a grid ratio, the grid ratio specifying an integer number of fine pixels of a high resolution grid that correspond to a device pixel of a raster of the output device; rendering the glyph at the size on the high resolution grid, the high resolution grid including fine pixels marked to represent the glyph and fine pixels that are unmarked; determining, for each line of pixels of the high resolution grid in a particular direction, a line-specific, per-transition adjustment number, the adjustment number determined from a scaled stem width for the glyph; and in each line of pixels of the high resolution grid, marking or erasing the line-specific, per-transition adjustment number of fine pixels in the high resolution grid at each transition from a marked fine pixel to an unmarked fine pixel in the particular direction.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2013-05-17	2013-11-16	2014-05-18	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2017-05-17	2017-11-16	2018-05-18	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2021-05-17	2021-11-16	2022-05-18	$7700.00	Window Closed / Lapsed

Glyph adjustment in high resolution raster while rendering

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag