Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1985-11-06
1987-08-18
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
84 101, 84 118, 358105, 358903, H04N 718
Patent
active
046880909
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a vision system and relates particularly but not exclusively to an electronic vision system which will provide a reaction in a target area consequent on a changing image in the target area.
The invention has particular application in the field of robotics but it has application in many other fields.
In one form the invention has particular application in the art of playing synthesizers. In this application a person is viewed by a video system and movements of the person are translated as variables to control the output signal from a synthesizer. In this way a synthesizer can be played by a person moving within a target area. Sequences of tones and colours can be provided to the synthesizer output by movement of body limbs. Movement of a person's body as a whole could provide gross changes to the synthesizer output whereas movement of individual limbs such as arms and/or fingers could provide tonal character to the synthesizer output.
DESCRIPTION OF PRIOR ART
In the art relating to playing of musical instruments, such as synthesizers, it has not been possible to provide control of the musical content by the mere presence and/or absence of an image. Typically the synthesizer is played by an operator who depresses keys to generate specific tones and/or to activate memory circuits to replay selected prerecorded material. A synthesizer is technically able to produce any sound required and the user interface which comprises the known keyboard and switches has limited the control of sound which can be generated at any one time. In other words the synthesizer has been seriously limited by the quality of the interface between the user. Witn the application of the present invention to a synthesizer a desired reaction i.e. reproduction of music from the synthesizer, can be provided by the mere movement of a person within a target area. This, in turn, will permit a higher quality interface and hence more complete control over musical synthesis.
STATEMENT OF INVENTION
Therefore according to a broad aspect of the present invention there is provided apparatus for viewing a target area and for providing a reaction consequent on a changing image in the target area, said apparatus having means for viewing the target and for creating video picture frame signals of the target area, analysing means for analysing the signals relating to one or more of discrete areas within each picture frame, said analysing means having feeding means for feeding in individual control to a reaction providing means to provide said reaction consequent on there being an image change in the one or more discrete areas from an earlier frame and wherein said reaction providing means reacts in accordance with the collective individual controls from said analysing means for each frame.
Preferably the analysing means is dynamically alterable so as to view different discrete areas.
Preferably the analysing means is dynamically alterable in a manner such that when image change is occurring within the target area at least some of said plurality of discrete areas may converge towards the area where said image change is occurring and reduce in area, whereby to provide said reaction based on a more detailed examination of the area where image change is occurring. Additionally or alternatively the discrete areas may change in number and/or overlap one another in prearranged manners. More generally the characteristics of the areas may change when there is an image change in the target area.
Most preferably the apparatus is a musical synthesizer, the output of which is controlled by viewing an image.
BRIEF DESCRIPTION OF DRAWINGS
In order that the invention can be more clearly ascertained preferred constructions will now be described with reference to the accompanying drawings wherein:
FIG. 1 is a simplified block schematic diagram of preferred apparatus connected with a synthesizer to provide a reaction in the target area i.e. sound from the synthesizer, which is determined by an image change within the t
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