Video amplitude related measurements in image analysis
AssigneeBausch & Lomb Incorporated
InventorRoger R. Morton
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Abstract
Image analysis techniques permit the measurement of a wide variety of parameters of the image being analyzed. This invention is specifically concerned with the measurement of parameters related to the amplitude of the video signal. Measurement related parameters include density, absorbance, transmittance, and reflectance of a particular sample. Techniques employed analyze the amplitude of a video signal over a predefined area and process this on a point-by-point basis to produce the desired measurement with exceptional accuracy.
Claims21
An image analysis and, optical and detection system for analyzing a field of view to produce optical characteristic data, comprising:
- scanning means for line scanning such field of view to produce a video signal having analog values representative of optical characteristic data;
- conversion means for converting the video signal analog values corresponding to discrete points along the scan line to discrete digital data having values which are a function of video signal analog values corresponding to such points;
- and
- memory means for storing image analysis optical characteristic data corresponding to digital data including means for automatically compensating for the response characteristics of the optical and detection system and for generating in response to the discrete digital data an output as a function of the stored optical characteristic data corresponding to the received discrete digital data to produce optical characteristic data.
An image analysis system for analyzing a field of view containing a feature or features to produce optical characteristic data of an analyzed feature or features, comprising:
- scanning means for line scanning such field of view to produce a video signal having analog values representative of optical characteristic data;
- conversion means for converting the video signal analog values corresponding to discrete points along the scan line to discrete digital data having values which are a function of video signal analog values corresponding to such points;
- and
- memory means for storing image analysis optical characteristic data corresponding to digital data including means for automatically compensating for characteristics imposed when generating the video signal and for generating in response to the discrete digital data an output as a function of the stored optical characteristic data corresponding to the received discrete digital data to produce optical characteristic data of such analyzed feature or features.
An image analysis system for analyzing a field of view containing a feature or features to produce optical characteristic data of such feature or features, comprising:
- scanning means for line scanning such field of view to produce a video signal having analog values representative of optical characteristic data;
- conversion means for converting the video signal analog values corresponding to discrete points along the scan line to discrete digital data having values which are a function of video signal analog values corresponding to such points;
- memory means for storing image analysis optical characteristic data corresponding to digital data and for generating in response to the discrete digital data an output as a function of the stored optical characteristic data corresponding to the received discrete digital data to produce optical characteristic data of such feature or features;
- optical characteristic data storage means for storing optical characteristic data corresponding to specific types of analyses to be performed and to the discrete points along the scan lines;
- and
- transfer means for transferring the stored data from the storage means to the memory means as a function of the analyses to be performed.
An image analysis system for analyzing a field of view containing a feature or features to produce optical characteristic data of such feature or features, comprising:
- scanning means for line scanning such field of view to produce a video signal having analog values representative of optical characteristic data;
- conversion means for converting the video signal analog values corresponding to discrete points along the scan line to discrete digital data having values which are a function of video signal analog values corresponding to such points;
- memory means for storing image analysis optical characteristic data corresponding to digital data and for generating in response to the discrete digital data an output as a function of the stored optical characteristic data corresponding to the received discrete digital data to produce optical characteristic data of such feature or features;
- and
- processing means receiving the generated optical characteristic data for arithmetically processing such data to generate feature related optical characteristic data, wherein the processing means includes a summation means for continually summing during a defined area of scan the discrete digital data from the memory means to provide an optical characteristic data summed over the defined area.
An image analysis system for analyzing a field of view containing a feature or features to produce optical characteristic data of such feature or features, comprising:
- scanning means for line scanning such field of view to produce a video signal having analog values representative of optical characteristic data;
- conversion means for converting the video signal analog values corresponding to discrete points along the scan line to discrete digital data having values which are a function of video signal analog values corresponding to such points;
- memory means for storing image analysis optical characteristic data corresponding to digital data and for generating in response to the discrete digital data an output as a function of the stored optical characteristic data corresponding to the received discrete digital data to produce optical characteristic data of such feature or features;
- and
- processing means receiving the generated optical characteristic data for arithmetically processing such data to generate feature related optical characteristic data, wherein the processing means includes an output register and a comparator for receiving output data from the output register and the data from the memory means to provide an input to the output register as a function of the comparison of such data from the register and the memory means during a defined area of scan to provide output data at the output register as a function of the peak value of the optical characteristic data over the defined area.
An image analysis system for analyzing a field of view containing a feature or features to produce optical characteristic data of such feature or features, comprising:
- scanning means for line scanning such field of view to produce a video signal having analog values representative of optical characteristic data;
- conversion means for converting the video signal analog values corresponding to discrete points along the scan line to discrete digital data having values which are a function of video signal analog values corresponding to such points;
- memory means for storing image analysis optical characteristic data corresponding to digital data and for generating in response to the discrete digital data an output as a function of the stored optical characteristic data corresponding to the received discrete digital data to produce optical characteristic data of such feature or features;
- and
- glare correction means for adjusting, as a function of scattered light within the image analysis system, the value of the video signal to be converted by the conversion means.
A method of analyzing a field of view in an image analysis and optical system containing a feature or features to produce optical characteristic data as a function of a detected feature or features, comprising the steps of:
- scanning the field of view line-by-line to generate a video signal having analog values representative of optical characteristic data corresponding to the field of view;
- converting the video signal analog values corresponding to discrete points along the scan line to discrete digital data having values which are a function of video signal analog values corresponding to such points;
- storing in discrete addressed locations in a memory means different values of the optical system response characteristic data corresponding to discrete digital data;
- and
- generating in response to the discrete digital data addressing specific locations in the memory means an output from the memory means as a function of the stored characteristic data corresponding to the received discrete digital data to produce optical characteristic data as a function of such feature or features.
Dependencies are inferred from the claim text.