Medical instrument for examining the cervix

A computer program product comprising machine executable instructions for execution by a processor for controlling a medical instrument, the medical instrument comprises an optical examination system for acquiring a cervical image;

• wherein execution of the instructions causes the processor to:
• acquire the cervical image using the optical examination system;
• calculate a set of interest point locations using a digital filter;
• calculate a filtered set of interest point locations using the set of interest point locations and morphological filter;
• calculate a reduced set of interest points locations using the filtered set of interest point locations and a neighborhood based filter;
• calculate a classified set of interest point locations using the reduced set of interest points and a trained classification module;
• calculate a set of punctation locations using the classified set of interest point locations and a second neighborhood based filter;
• and
• calculate punctation mark regions using the punctation point locations;
• wherein execution of the instructions further causes the processor to:
• acquire a second cervical image using the optical examination system;
• calculate a second set of interest point locations using the digital filter;
• calculate a second filtered set of interest point locations using the second set of interest point locations and the morphological filter;
• calculate a second reduced set of interest points locations using the second filtered set of interest point locations and the neighborhood based filter;
• calculate a second classified set of interest point locations using the trained classification module and the second reduced set of interest points;
• and
• calculate a second set of punctation locations using the second neighborhood based filter and the second classified set of interest point locations, wherein the punctation mark regions using the punctation point locations and the second punctation point locations;
• register the cervical image and the second cervical image using an image registration module;
• acquire the first cervical image and the second cervical image by acquiring video data comprising multiple image frames;
• select the first cervical image and the second cervical image from the multiple image;
• receive the video data comprising multiple image frames;
• determine a transformation model between each pair of consecutive image frames selected from the multiple image frames;
• calculate a cumulative transformation model from the transformation model between each pair of consecutive image frames;
• register each of the multiple image frames using the cumulative transformation model;
• and
• provide the registration of the first cervical image and the second cervical image using the cumulative transformation model.

A method of operating a medical instrument, the medical instrument comprises an optical examination system for acquiring a cervical image;

• wherein the method comprises the steps of:
• acquiring the cervical image using the optical examination system;
• calculating a set of interest point locations using a digital filter;
• calculating a filtered set of interest point locations using the set of interest point locations and a morphological filter;
• calculating a reduced set of interest points locations using the filtered set of interest point locations and a neighborhood based filter;
• calculating a classified set of interest point locations using the reduced set of interest points and a trained classification module;
• calculating a set of punctation locations using the classified set of interest point locations and a second neighborhood based filter;
• and
• calculating punctation mark regions using the punctation point locations;
• wherein execution of the instructions further causes the processor to:
• acquiring a second cervical image using the optical examination system;
• calculating a second set of interest point locations using the digital filter;
• calculating a second filtered set of interest point locations using the second set of interest point locations and the morphological filter;
• calculating a second reduced set of interest point locations using the filtered set of interest point locations and the neighborhood based filter;
• calculating a second classified set of interest point locations using the trained classification module and the second reduced set of interest points;
• and
• calculating a second set of punctation locations using the second neighborhood based filter and the second classified set of interest point locations, wherein the punctation mark regions using the punctation point locations and the second punctation point locations;
• registering the cervical image and the second cervical image using an image registration module;
• acquiring the first cervical image and the second cervical image by acquiring video data comprising multiple image frames;
• selecting the first cervical image and the second cervical image from the multiple image frames;
• receiving the video data comprising multiple image frames;
• determining a transformation model between each pair of consecutive image frames selected from the multiple image frames;
• calculating a cumulative transformation model from the transformation model between each pair of consecutive image frames;
• registering each of the multiple image frames using the cumulative transformation model;
• and
• providing the registration of the first cervical image and the second cervical image using the cumulative transformation model.