Method and apparatus for recording in a memory trajectories and traces of objects

A method intended to store in a digital memory the set of information obtained by comparing by means of a logical operator the information previously stored in the aforesaid memory with the information originating from a television camera, the latter being capable of scanning a picture composed of a plurality of elementary areoles and of delivering at the output in the form of an electric signal an elementary information for each of the aforesaid areoles, such method consisting of the following stages:

• delimiting a field within said picture;
• establishing a one-to-one correspondence between each of the areoles of the television camera's field and one of the storage locations;
• converting the analog signal originating from the television camera for each of the areoles of the camera's field into a digital signal;
• reading off the memory the signal relating to one given storage location when the television camera issues the signal relating to the areole corresponding to the said location;
• causing the said signal issuing from the television camera and the said signal issuing from the memory to be fed simultaneously to the inputs of the logical operator;
• entering into the memory in the said location the result of the comparison performed by the said logical operator between said signal issuing from the memory and the said signal issuing from the television camera.

A method intended to store in a digital memory the plane projection of the trace left by a particle in a transparent medium in which method use is made of a microscope whose images are picked up by a television camera, such method comprising the following stages;

• delimiting in the television camera's picture frame a field including the trace to be recorded;
• subdividing the said field into a grid of areoles corresponding to small sections of the lines of the television camera, obtaining on the output therefrom one signal for each areole;
• establishing a one-to-one correspondence between each of the said areoles and one storage location;
• focusing the microscope on different parallel layers of the medium containing the trace to be recorded;
• converting the analog signal issuing from the television camera for each of the areoles into which said field is subdivided into a digital signal;
• reading of the memory the information contained in the storage location corresponding to the areole which is scanned by the television camera at a given instant;
• causing the signal relating to a certain field areole and the signal read off the memory relating to the location corresponding to the said areole to be fed simultaneously to the inputs of an inclusive-OR logical operator;
• entering in the storage location referred to in the preceding point the signal issuing from the said logical operator, being the result of the comparison between the two signals simultaneously fed into the said operator.

A method intended to store in a digital memory the plane projection of the trajectory of a moving object, in which method use is made of an optical system capable of viewing the object along the said trajectory and of a television camera capable of picking up the images supplied by the said optical system, which method comprises the following stages;

• delimiting in the television camera's picture frame a field including the trace to be recorded;
• subdividing the said field into a grid of areoles corresponding to small sections of the lines of the television camera picture, obtaining on the output therefrom one signal of each areole;
• establishing a one-to-one correspondence between each of the said areoles and one storage location;
• converting the analog signal issuing from the television camera for each of the areoles into which said field is subdivided into a digital signal;
• reading off the memory the information contained in the storage location corresponding to the areole which is scanned by the television camera at a given instant;
• causing the signal relating to a certain field areole and the signal read off the memory relating to the location corresponding to the said areole to be fed simultaneously to the inputs of an inclusive-OR logical operator;
• entering in the storage location referred to in the preceding point the signal issuing from the said logical operator, being the result of the comparison between the two signals simultaneously fed into the said operator.

A method intended to store in a digital memory the plane projection of the trajectory of a moving particle, the stationary objects with respect to which the said particle is moving being excluded, in which use is made of an optical system capable of viewing the object along the said trajectory and of a television camera capable of picking up the images supplied by the said optical system, which method comprises the following stages.

• delimiting in the television camera's picture frame a field including the trace to be recorded;
• subdividing the said field into a grid of areoles corresponding to small sections of the television camera's picture lines, obtaining on the output therefrom one signal for each areole;
• establishing a one-to-one correspondence between each of the said areoles and one storage location;
• converting the analog signal issuing from the television camera for each of the areoles into which said field is subdivided into a digital signal;
• reading off the memory the information contained in the storage location corresponding to the areole scanned by the television camera at a given instant;
• causing the signal issuing from the television camera and relating to a certain field areole and the signal read off the memory relating to the location corresponding to the said areole to be simultaneously fed to the inputs of an "exclusive-OR" logical operator;
• entering in the storage location referred to in the preceding point the signal issuing from the said logical operator, being the result of the comparison of the two signals simultaneously fed into the said operator.