Video image creation system which simulates drafting tool
First Claim
1. A video image creation system comprising:
- drafting means operable by an operator to designate points on a desired image;
means for producing first signals representing a characteristic to be imparted to the image at said points;
a store having storage locations corresponding to points on the image;
processing means for producing for each point designated by said drafting means a new image signal which is a function of said first signal and of a previous image signal for the same point derived from the location in said store corresponding to the respective point;
means for storing the new image signal at the location in said store corresponding to the respective point; and
means for reading image signals from said store to produce an image corresponding to the stored signals.
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Abstract
A video image creation system provides intensity or color data from one or more stores. The image is created under manual control which effectively defines the coordinates of the artists implement at any given time.
A processor receives the incoming image data and previously derived data from a frame store and modifies this data in dependence on a parameter available from another store. The created image can be viewed on a monitor.
The parameter controls the contribution made from any adjacent, previously created, parts of the image and can be such as to simulate different pencil or brush shapes or types of paint for example. Additional facilities such as pressure sensitivity and blurring can be provided.
82 Citations
34 Claims
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1. A video image creation system comprising:
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drafting means operable by an operator to designate points on a desired image; means for producing first signals representing a characteristic to be imparted to the image at said points; a store having storage locations corresponding to points on the image; processing means for producing for each point designated by said drafting means a new image signal which is a function of said first signal and of a previous image signal for the same point derived from the location in said store corresponding to the respective point; means for storing the new image signal at the location in said store corresponding to the respective point; and means for reading image signals from said store to produce an image corresponding to the stored signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A video image creation system comprising:
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drafting means operable by an operator to designate a series of points on a line of a desired image; means for producing for each point designated by said drafting means a plurality of first signals representing a characteristic to be imparted to the image at a plurality of image points defining a patch of image points; a store having storage locations corresponding to points on the image; processing means for producing for each image point in the patch a new image signal which is a function of the respective first signal and of a previous image signal stored at the location in said store corresponding to the respective image point, said location being determined by the point designated by the drafting means and by the position of the image point in the patch; means for storing the new image signals at said locations in the store, and means for reading signals from said store, for producing an image signal corresponding to the stored image signals. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A video image creation system comprising:
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drafting means operable by an operator to designate positions on a desired image; storage means having means for storing signals representing values of a characteristic of the image, at storage locations representing points on a raster of image points; means responsive to operation of said drafting means to produce a signal representing a new value of said characteristic relevant to a position designated by said drafting means; processing means for combining proportions of said produced signal and any signal stored in the corresponding location in said storage means; and means for storing the resultant of the combination in the corresponding location in said storage means. - View Dependent Claims (21)
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22. A graphics system comprising:
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a store having respective locations storing previous image signals for respective pixels of an image; means including a pen for designating one or more selected pixels; means for producing new image signals for the selected pixels; means for reading the previous image signals for the selected pixels from the store and for combining them with the new image signals for the respective pixels to produce respective combined signals for said selected pixels; means for storing the combined signals in the respective locations of the store; and means for reading the image signals from the store, including said combined signals, and for using them to produce and display the image represented thereby. - View Dependent Claims (23, 24, 25)
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26. A video graphics system comprising:
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a store having locations for storing image signals for respective portions of an image; means for designating one or more selected portions of the image; means for producing first signals representative of a characteristic to be imparted to said selected portions of the image; means for reading from the store any image signals previously stored therein for said selected portions of the image and for combining the read out signals with the first signals for the respective selected portions of the image to derive respective combined signals for said selected portions of the image; means for storing the combined signals in the respective locations for the store; and means for reading the image signals from the store and for using them to produce and display the image represented thereby. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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33. A video image creation system comprising drafting means operable by the operator to designate desired strokes in an image, video image display means, processing means responsive to said drafting means to derive image signals which when applied to said display means will produce an image of said desired strokes, said processing means being such that said image signals cause the intensity and/or colour of the desired strokes to vary across the width of the strokes, and means for applying said video signals to said display to create an image.
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34. A video image creation system comprising drafting means operable by the operator to designate positions on a desired shape, video image display means, processing means responsive to said drafting means for producing for each position designated by said drafting means a group of image signals relating to a patch of image points, the signals of the said group having different values to simulate the distribution of a video characteristic over said patch, means for applying such groups of image signals to said display means in such a manner as to produce for each designated point a patch of image points on the display exhibiting said distribution of a video characteristic.
Specification