Method of indexing and searching images of text in video
AssigneeMATE—Media Access Technologies Ltd.
InventorsItzhak Wilf, Joseph Ladkani, Ovadya Menadeva, Hayit Greenspan
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Abstract
A method for generating an index of the text of a video image sequence is provided. The method includes the steps of determining the image text objects in each of a plurality of frames of the video image sequence; comparing the image text objects in each of the plurality of frames of the video image sequence to obtain a record of frame sequences having matching image text objects; extracting the content for each of the similar image text objects in text string format; and storing the text string for each image text object as a video text object in a retrievable medium.
Claims9
A method of generating an index of the text of a video image sequence, the method comprising the steps of:
- determining the image text objects in each of a plurality of frames of the video image sequence;
- comparing the image text objects in each of said plurality of frames of the video image sequence to obtain a record of frame sequences having matching image text objects;
- extracting the content for each of said similar image text objects in text string format;
- storing the text string for each image text object as a video text object in a retrievable medium;
- and
- categorizing the text string as at least one of a group including static text, scrolling text, overlayed text and in-scene text, wherein said step of categorizing comprises the steps of:
- tracking the text string motion, or lack of it, over time;
- tracking the image background motion or lack of it, over time;
- and
- comparing the text string motion and the background motion.
A method of generating an index of the text of a video image sequence, the method comprising the steps of:
- determining the image text objects in each of a plurality of frames of the video image sequence;
- comparing the image text objects in each of said plurality of frames of the video image sequence to obtain a record of frame sequences having matching image text objects;
- extracting the content for each of said similar image text objects in text string format;
- storing the text string for each image text object as a video text object in a retrievable medium;
- and
- storing the frame location of said text string for each image text object as a video text object in a retrievable medium.
A method of generating an index of the text of a video image sequence, the method comprising the steps of:
- determining the image text objects in each of a plurality of frames of the video image sequence;
- comparing the image text objects in each of said plurality of frames of the video image sequence to obtain a record of frame sequences having matching image text objects;
- extracting the content for each of said similar image text objects in text string format;
- and
- storing the text string for each image text object as a video text object in a retrievable medium, wherein said step of determining the image text objects comprises the steps of:
- a) selecting a consecutive pair of frames consisting of a first current frame and its previous frame;
- b) selecting an image text object in said current frame;
- c) comparing the selected image text object with each image text object of said previous frame;
- d) repeating steps b) and c) for each image text object in said current frame;
- e) selecting a subsequent consecutive pair of frames consisting of a second current frame and the previous frame of said second current frame, wherein said previous frame of said second current frame is the first current frame;
- and
- f) repeating steps b)-e) for each consecutive pair of frames of a video sequence.
Dependencies are inferred from the claim text.