89 results about "Brush stroke" patented technology

The invention provides methods of protecting selected regions of an image from subsequent modification during the operation of a graphics application. The methods allow a user to select a region of an image to protect, and to assign a level of protection to the selected region. Subsequent brush strokes in the region are then attenuated according to the assigned level of protection and blended into the image without artifacts caused by overlapping strokes. The invention also provides a method of blending individual strokes into a texture without segmentation artifacts.

A method, system, and computer-readable storage medium are disclosed for simulating bristle brush behavior and generating vector output from such simulations. User input may represent a stroke made by a paint brush comprising multiple bristles sweeping across a canvas. A vector representation of the brush stroke's effects may be generated by, for each of the plurality of bristles: determining a path along which the bristle has swept, and generating a vector representation of the path along which the bristle has swept (e.g., a set of Bézier curves, or straight line segments). The vector representation of the effects of the brush stroke may comprise the vector representations of the paths along which each of the plurality of bristles has swept. The vector representations of the paths of each bristle sweep may be composited over each other in an image editing application to depict the brush stroke for display and/or for printing.

A system and method is described for rendering a warped brush stroke using a bitmap brush image, the brush stroke being along a arbitrarily curved guideline. The described system and method generate a piecewise linear approximation to the guideline followed by generating polygons with the aid of the linear segments such that the generated polygons are convex and contiguous linear segments result in contiguous polygons. A mapping is identified between segments of the bitmap brush and the polygons such that the corners or the boundaries of the segments of a segment map to the corners or boundaries of a corresponding polygon. The segment of the bitmap brush is mapped into the corresponding polygon using transformations that do not require visiting a pixel in the rendered warped brush stroke more than once. Examples of such transformations include bilinear transformations and texture mapping in combination with tiling.

An electric toothbrush in which the brushing head moves in an elliptical motion such that, on the brushing stroke, the bristles are proximate the teeth, and in the recovery portion of the cycle the bristles are pulled away from the teeth. A position sensitive switch automatically switches from a forward to a reverse operation of the electric motor, depending on the positioning of the toothbrush in a user's hand, allowing the user to brush both the upper and lower teeth using a stroke carrying the bristles from the gum line to the ends of the teeth, as is recommended by dental professionals, without having to move the toothbrush from hand to hand or manually move the switch from the forward to the reverse positions. A bridge pad engages the face of the teeth, maintaining a proper distance between the teeth and bristles during the elliptical rotation of the brush head.

A system and method for automatically applying a gel coat brush stroke pattern over an image surface secured to a support is described. A liquid gel applicator dispenses a predetermined quantity of transparent liquid gel on the image surface. A brush stroking machine is provided with a plurality of brush head modules which are connected to a reciprocating linkage. The linkage causes reciprocal arcuate displacement of bristles secured to the brush head modules. An adjustable support positions the bristles over the image surface for contact with the liquid gel dispensed thereon by the liquid gel applicator. A conveyor displaces the support with the image surface facing up under the liquid gel applicator and the bristles of the brush head modules along a straight axis whereby reciprocating displacement of the bristles imparts brush stroke patterns in the liquid gel over the image surface.

A method, system, and computer-readable storage medium for simulating bristle brush behavior in an image editing application may use stiffness-height parameterization to determine the height of a brush tool above a canvas during a brush stroke. The determination may be dependent on the pressure applied during the stroke (e.g., using a stylus on a pressure-sensitive tablet), and on the stiffness of the brush bristles. The system may select a standard-stiffness or high-stiffness mapping between stylus pressure values and brush height values dependent whether the bristle stiffness value is above or below a pre-determined threshold. The standard-stiffness mapping may apply a linear function to pressure values to determine height values. Using the high-stiffness mapping, the effect of increased pressure on corresponding brush height values may be reduced as bristle stiffness is increased. Adjusting pressure-to-height mapping based on stiffness may allow the system to realistically mimic the behavior of stiff bristle brushes.

The invention discloses a computer-assisted sketch drawing method and system based on eye movement and brush stroke data. The method includes the following steps that feature extraction is conducted on eye movement data and brush stroke data of a designer, and eye movement feature parameters and brush stroke feature parameters are obtained; the eye movement data and the brush stroke data are collected and obtained in a sketch drawing process by using a computer; whether the current state of the designer is a creative thinking state is judged according to the eye movement feature parameters and the brush stroke feature parameters; when the designer is in the creative thinking state, the next staring point position of the designer is judged according to the eye movement data, and an image stimulus source is shown at the position and assists the designer to conduct sketch drawing. According the eye movement and brush stroke information of the designer, the creative thinking state of the designer is identified and stimulated. By predicting staring point position changes of the designer, the image stimulus source position is optimized, and designing quality of the designer is improved.

Methods and apparatus for simulating fluid motion using procedural shape growth. In a vector-based, fluid motion simulation technique, fluid location may be defined by groups of one or more polygons deposited on a digital canvas. Two or more polygons may overlap. The polygons may be semitransparent. To simulate fluid motion, vertices that specify the edges of each deposited polygon are independently moved. By moving the vertices, a polygon may grow, and fluid motion effects may be simulated, including but not limited to directional flow and blending effects. A randomization technique may be applied to the movement at each vertex to simulate the non-uniform spreading of fluids. Overlapped polygons may be blended with overlapping polygons to simulate the mixing of fluids. The technique may be applied, for example, in watercolor painting simulation, where groups of one or more polygons are deposited using brush strokes.

An electric toothbrush in which the brushing head moves in an elliptical motion such that, on the brushing stroke, the bristles are proximate the teeth, and in the recovery portion of the cycle the bristles are pulled away from the teeth. A position sensitive switch automatically switches from a forward to a reverse operation of the electric motor, depending on the positioning of the toothbrush in a user's hand, allowing the user to brush both the upper and lower teeth using a stroke carrying the bristles from the gum line to the ends of the teeth, as is recommended by dental professionals, without having to move the toothbrush from hand to hand or manually move the switch from the forward to the reverse positions. A bridge pad engages the face of the teeth, maintaining a proper distance between the teeth and bristles during the elliptical rotation of the brush head.

A laminated assembly (10) comprising a substrate (100) with an image (103) thereon, has a first film (20) with a brush stroke texture embossed therein (21), a second film (40) with a canvas texture embossed therein (41) to create a final product having the appearance of a piece of fine art.

A method and apparatus for producing simulated oil paintings by means of a variety of commercial software programs. A digital color image is created and printed on to a substrate. Also printed on to the same substrate and registered thereto, is a slow drying, clear, embossing liquid in the pattern of brush strokes derived from one or more of the colors printed on to the substrate. A thermographic powder is dusted onto the embossing liquid while still wet and excess powder removed. The substrate is then heated to dry and raise the brush stroke pattern of the embossing ink to create a three dimensional effect on the substrate. The raised brush stroke pattern in combination with printed color image creates a work that has the three dimensional effect simulating an original oil painting.

The invention discloses a drawing board function based on cells. The drawing board function based on the cells is characterized in that a background canvas is divided into a plurality of cells, and the thickness lower limit of a brush stroke is defined to be a cell, i.e. the cell equals to a point. Through one click to a screen, which cell is the point clicked in can be judged, the cell can be filled with current color of the brush stroke, and continuous points can be drawn through moving on the screen. The thickness of the brush stroke can be selected through a drop-down option; through a color tool bar, a background color and colors which are used recently can be stored, and the current color of the brush stroke can be selected; and through a color selecting cell matrix, the color tool bar can be operated, and the current color of the brush stroke can be selected.

A texture processing unit 54 carries out texture processing on data of a plurality of pixels selected by a processing object selection unit 53 using the same brush stroke pattern and respective colors of the pixels. A hatching processing unit 55 carries out hatching processing of adding diagonal expression substantially perpendicular to the orientation of the stroke pattern on data of an area of low luminance (i.e., dark) pixels from among the image data including YUV components using the respective colors of the pixels. The composition unit 56 carries out composition processing of compositing the image data outputted from the hatching processing unit 55 with the image data outputted from the texture processing unit 54.

Included are embodiments of product performance and perception modeling. At least some embodiments include receiving a product geometry for a simulated toothbrush, the product geometry defining a physical product characteristic of the simulated toothbrush, receiving an environmental geometry for a simulated mouth, the environmental geometry defining a physical mouth characteristic and a perspective characteristic of the simulated mouth, and applying a simulated plaque indication layer in the simulated mouth. Similarly, some embodiments include applying a predetermined brushing stroke of the simulated toothbrush in the simulated mouth, determining sensory performance of the simulated toothbrush from the predetermined brushing stroke, and generating a scorecard indicating the sensory performance of the simulated toothbrush.

The invention provides a calligraphic handwriting presentation method based on an optical principle. The method comprises the following steps: acquiring a brush stroke image drawn on a handwriting board by a user through a writing brush, wherein the handwriting board is a light transmission board; arranging a light source in the corresponding position of the handwriting board based on a mode of generating the image on the handwriting board to form the image on the surface of contact between the writing brush and the handwriting board; sending the acquired brush stroke image to an image processing device by a photoelectric image sensor; collecting the brush stroke image in real time by the image processing device, processing the collected brush stroke image, extracting brush stroke shape profile data, drawing the brush stroke shape profile data on canvas, filling the drawn brush stroke shape profile with color, forming a calligraphic handwriting by the continuously drawn color-filled brush stroke shape profile, and presenting the canvas on a display device. Through the method, a conventional writing brush can still be used by the user, the image on the canvas is relatively close to the simulation effect of the image really drawn by the user, and the hardware requirement is relatively low.

The invention discloses an electronic brush modeling method based on texture learning. The method comprises the following steps of: inputting a writing stroke on a digital writing pad by a user, and storing the writing stroke in a mode of a data structure with a plurality of discrete points; taking the discrete points as framework points of the writing stroke, and generating two groups of corresponding edge profile points on the two sides of the framework points according to writing physical strength of each framework point; fitting the two groups of profile points by using a spline curve, and forming a line profile of the stroke; learning real brush calligraphy texture by methods of a neural network and a fuzzy logic, and obtaining a gray value sequence of the calligraphy texture; and filling inner sides of the profile of the stroke according to the obtained gray value sequence and finally obtaining brush calligraphy work. By adoption of the methods of the neural network and the fuzzy logic, real brush calligraphy texture can be obtained, so that the finally-obtained brush stroke is realistic and lifelike, and the speed of computer processing is high.