Motion detection employing direct Fourier transforms of images

A device comprising:

• a medium having an electrical property which varies as a function of an image incident on the medium and as a function of strain disturbances in the medium;
• means for causing the incidence of an an image on the medium;
• means for causing strain disturbances in the medium;
• means for measuring the electrical property of the medium while said image is incident thereon and while the strain disturbances are present therein to derive a first electrical signal representing the image and a second electrical signal indicating motion of the image;
• and
• means for modifying said first electrical signal with said second electrical signal to modify the first electrical signal in accordance with the motion of the image represented thereby.

A device comprising:

• a medium having an electrical property which varies as a function of an image incident on the medium and as a function of strain disturbances in the medium;
• means for causing an incidence of an image on the medium;
• means for causing strain disturbances in the medium;
• means for measuring the electrical property of the medium while said image is incident thereon and while the strain disturbances are present therein to derive an electrical signal representing the image;
• means for providing a selected constant;
• and
• means for modifying the electrical signal with said selected constant.

A device comprising:

• a medium having an electrical property which varies as a function of an image incident on the medium and as a function of the square of strain disturbances in the medium;
• means for causing the incidence of an image on the medium;
• means for causing strain disturbances in the medium, said means comprising a plurality of transducers in acoustical coupling with the medium and means for exciting the transducers for generating the effect of an acoustic beam scanning the medium;
• and
• means for measuring the electrical property of the medium while said image is incident thereon and while said strain disturbances are present therein to derive an electrical signal representing the image.

A device comprising:

• a first medium having an electrical property which varies as a function of an image incident on the medium and as a function of strain disturbances in the medium;
• a second medium having an optical property which varies as a function of strain disturbances in the medium;
• means for modulating an original image with the optical property of the second medium and for causing the incidence of the resulting modulated image on the second medium;
• first and second means for causing strain disturbances in the first and second medium respectively;
• and
• means for measuring the electrical property of the first medium while the modulated image is incident thereon and while the strain disturbances are present therein to derive an electrical signal representing the original image.

A device comprising:

• a medium having an optical property which varies as a function of strain disturbances in the medium;
• means for generating an electrical signal corresponding to the intensity of a light image incident thereon;
• and
• means for modulating an image with the optical property of the medium while a selected disturbance is present therein, and for causing the resulting modulated image to impinge on the means for generating said electrical signal.

A method of detecting motion within an image comprising the steps of:

• providing a medium having an electrical property which varies as a function of an image incident on the medium and as a function of strain disturbances in the medium;
• causing the incidence of an image on the medium;
• causing strain disturbances in the medium;
• and
• measuring the electrical property of the medium while said image is incident thereon and while the strain disturbances are present in it to derive an electrical signal having a parameter indicating motion within the image.

A method of detecting motion within an image and providing corresponding modification of electrical signals representing the image, comprising the steps of:

• providing a medium having an electrical property which varies as a function of an image incident on the medium and as a function of strain disturbances in the medium;
• causing the incidence of an image on the medium;
• causing strain disturbances in the medium;
• measuring the electrical property of the medium while said image is incident thereon and while the strain disturbances are present therein to derive a first electrical signal representing the image and a second electrical signal indicating motion of the image;
• and
• modifying said first electrical signal with said second electrical signal to thereby modify the first electrical signal in accordance with the motion of the image represented thereby.

A method of scaling an image represented by an electrical signal, comprising the steps of:

• providing a medium having an electrical property which varies as a function of an image incident on the medium and as a function of strain disturbances in the medium;
• causing the incidence of an image on the medium;
• causing strain disturbances in the medium;
• measuring the electrical property of the medium while said image is incident thereon and while the strain disturbances are present therein to derive an electrical signal representing the image;
• providing a selected constant;
• and
• modifying the electrical signal with said selected constant to correspondingly scale the image represented thereby.

A method of obtaining an electrical signal representation of an image comprising the steps of:

• providing a substrate of a material capable of undergoing time-varying and space-varying strain disturbances;
• disposing a first electrically conductive film on a surface of the substrate;
• disposing a selected electrically isolating film on the first conductive film and a second electrically conductive film on the side of the isolating film facing away from the first conductive film, each of said film being acoustically coupled with the substrate to undergo strain disturbances therewith;
• causing the incidence of an image on the junction between one of said conductive films and the isolating film;
• causing strain disturbances in the substrate and in the films;
• and
• measuring an electrical property of said junction while said image is incident on it and while said strain disturbances are present in it to thereby derive an electrical signal representing the incident image.

A method of electronic processing of images, comprising the steps of:

• providing a medium having an electrical property which varies as an image incident on the medium and as a function of strain disturbances in the medium;
• causing the incidence of an image on the medium;
• causing strain disturbances in the medium;
• measuring the electrical property of the medium while said image is incident thereon and while the strain disturbances are present therein to derive an electrical signal representing the image, said electrical signal comprising a plurality of phase and magnitude values representative of Fourier series terms defining the image;
• and
• selectively modifying the image by selectively operating on said phase and magnitude values with selected operators.

A method of obtaining an electrical signal representing an image comprising the steps of:

• providing a medium having an electrical property which varies as a function of an image incident on the medium and as a function of the square of strain disturbances in the medium;
• causing the incidence of an image on the medium;
• causing a plurality of strain waves simultaneously propagating in the medium, each strain wave propagating along a direction different from that of any other strain wave;
• and
• measuring the electrical property of the medium while said image is incident thereon and while said strain disturbances are present therein to derive an electrical signal representing the image.

A method of obtaining an electrical signal representing an image, comprising the steps of:

• providing a first medium having an electrical property which varies as a function of an image incident on the medium and as a function of strain disturbances in the medium, and a second medium having an optical property which varies as a function of strain disturbances in the medium;
• causing selected strain disturbances in the first medium and in the second medium;
• modulating an original image with the optical property of the second medium, and causing the incidence of the resulting modulated image on the first medium;
• and
• measuring the electrical property of the first medium while the modulated image is incident thereon and while the strain disturbances are present therein to derive an electrical signal representing the original image.

A method of obtaining an electrical signal representation of an image, comprising the steps of:

• providing a medium having an optical property which varies as a function of strain disturbances in the medium and causing selected strain disturbances in the medium;
• providing a device which generates an electrical signal corresponding to the intensity of a light image incident thereon;
• and
• passing an image through the medium to be modulated by said optical property thereof, causing the resulting modulated image to impinge on the device, and generating from the device an electrical signal representative of selected components of the Fourier transform of the image.