Method and system for determining a region of interest in an image
First Claim
1. A method for determining a region of interest in an image, this method being implemented in a road vehicle, said method comprising the following steps:
- a plurality of lines Li i=1, . . . , n formed by pixels is defined in the image;
in each line Li, a plurality of segments Sj j=1, . . . , m constituted by pixels is defined;
a luminance level NVG(Sj) is calculated for each segment Sj based on the luminance of the pixels constituting this segment Sj;
depending on this luminance level NVG(Sj), the segment Sj is selected or excluded from the region of interest; and
the region of interest is obtained by amalgamating all the segments selected for each line;
wherein the segment Sj is excluded from the region of interest if the length of this segment Sj is less than a predetermined minimum length.
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Abstract
A system and method for determining a region of interest in an image, characterized in that it comprises the following steps: a plurality of lines Li i=1, . . . , n formed by pixels is defined in the image; in each line Li, a plurality of segments Sj j=1, . . . , m constituted by pixels is defined; a luminance level NVG(Sj) is calculated for each segment Sj based on the luminance of the pixels constituting this segment Sj; depending on this luminance level NVG(Sj) the segment Sj is selected or excluded from the region of interest; and the region of interest is obtained by amalgamating all the segments selected for each line.
3 Citations
26 Claims
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1. A method for determining a region of interest in an image, this method being implemented in a road vehicle, said method comprising the following steps:
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a plurality of lines Li i=1, . . . , n formed by pixels is defined in the image; in each line Li, a plurality of segments Sj j=1, . . . , m constituted by pixels is defined; a luminance level NVG(Sj) is calculated for each segment Sj based on the luminance of the pixels constituting this segment Sj; depending on this luminance level NVG(Sj), the segment Sj is selected or excluded from the region of interest; and the region of interest is obtained by amalgamating all the segments selected for each line; wherein the segment Sj is excluded from the region of interest if the length of this segment Sj is less than a predetermined minimum length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for determining a region of interest in an image, this method being implemented in a road vehicle, said method comprising the following steps:
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a plurality of lines Li i=1, . . . , n formed by pixels is defined in the image; in each line Li, a plurality of segments Sj j=1, . . . , m constituted by pixels is defined; a luminance level NVG(Sj) is calculated for each segment Sj based on the luminance of the pixels constituting this segment Sj; depending on this luminance level NVG(Sj), the segment Sj is selected or excluded from the region of interest; and the region of interest is obtained by amalgamating all the segments selected for each line; wherein a search window, inside which the plurality of lines Li is defined, is located in the image; wherein incrementing of the segment Sj is stopped and this segment Sj is closed if the pixel incremented corresponds to an edge of the search window. - View Dependent Claims (15)
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16. A method for determining a region of interest in an image, this method being implemented in a road vehicle, said method comprising the following steps:
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a plurality of lines Li i=1, . . . , n formed by pixels is defined in the image; in each line Li, a plurality of segments Sj j=1, . . . , m constituted by pixels is defined; a luminance level NVG(Sj) is calculated for each segment Sj based on the luminance of the pixels constituting this segment Sj; depending on this luminance level NVG(Sj), the segment Sj is selected or excluded from the region of interest; and the region of interest is obtained by amalgamating all the segments selected for each line; wherein a search window, inside which the plurality of lines Li is defined, is isolated in the image; wherein the search widow is segmented into a plurality of areas and specific rules concerning the definition of the segments Sj and/or of the lines Li are allotted to each area; wherein the search window comprises at least one first area and one second area respectively positioned horizontally around a first and a second point of interest in the image; wherein the search window comprises a third area defined so as to ensure continuity between the first and second areas.
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17. A method for determining a region of interest in an image, this method being implemented in a road vehicle, said method comprising the following steps:
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a plurality of lines Li i=1, . . . , n formed by pixels is defined in the image; in each line Li, a plurality of segments Sj j=1, . . . , m constituted by pixels is defined; a luminance level NVG(Sj) is calculated for each segment Sj based on the luminance of the pixels constituting this segment Sj; depending on this luminance level NVG(Sj), the segment Sj is selected or excluded from the region of interest; and the region of interest is obtained by amalgamating all the segments selected for each line; wherein a search window, inside which the plurality of lines Li is defined, is isolated in the image; wherein the search widow is segmented into a plurality of areas and specific rules concerning the definition of the segments Sj and/or of the lines Li are allotted to each area; wherein the search window comprises at least one first area and one second area respectively positioned horizontally around a first and a second point of interest in the image; wherein the search window comprises a third area defined so as to ensure continuity between the first and second areas; wherein the search window is segmented so that the third area corresponds in the image to a transition between the road and the sky; wherein the limits between the areas of the search window are vertically positioned according to data relating to pitching of the vehicle or so that the third area is vertically centered around a vanishing point of the image.
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18. A method for determining a region of interest in an image, this method being implemented in a road vehicle, said method comprising the following steps:
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a plurality of lines Li i=1, . . . , n formed by pixels is defined in the image; in each line Li, a plurality of segments Sj j=1, . . . , m constituted by pixels is defined; a luminance level NVG(Sj) is calculated for each segment Sj based on the luminance of the pixels constituting this segment Sj; depending on this luminance level NVG(Sj), the segment Sj is selected or excluded from the region of interest; and the region of interest is obtained by amalgamating all the segments selected for each line; wherein the search widow is segmented into a plurality of areas and specific rules concerning the definition of the segments Sj and/or of the lines Li are allotted to each area; wherein the search window comprises at least one first area and one second area respectively positioned horizontally around a first and a second point of interest in the image; wherein the method is implemented in a road vehicle and at least one point of interest is determined as being a vanishing point from a system for detecting a vanishing point based on a steering wheel angle of the vehicle and/or from data generated by a navigation system and/or from a system for detecting road marking lines; wherein the search window comprises a third area defined so as to ensure continuity between the first and second areas. - View Dependent Claims (19, 20)
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21. A system for aiding a driver to drive a road vehicle comprising:
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means for defining a plurality of lines Li i=1, . . . , n formed by pixels is defined in the image; means for defining in each line Li, a plurality of segments Sj j=1, . . . , m constituted by pixels; means for collecting a luminance level NVG(Sj) for each segment Sj based on the luminance of the pixels constituting this segment Sj; means for selecting or excluding the segment Sj from the region of interest in response to this luminance level NVG(Sj); and means for amalgamating all the segments selected for each line to obtain the region of interest; wherein the segment Sj is excluded from the region of interest if the length of this segment Sj is less than a predetermined minimum length. - View Dependent Claims (22, 23)
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24. A system for aiding a driver to drive a road vehicle wherein said system comprises a processor programmed with a computer program having one or more sequences of instructions that:
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defines a plurality of lines Li i=1 . . . n formed by pixels defined in the image; defines in each line Li, a plurality of segments Sj j=1 . . . m constituted by pixels; collects a luminance level NVG(Sj) for each segment Sj based on the luminance of the pixels constituting this segment Sj; selects or excluding the segment Sj from the region of interest in response to this luminance level NVG(Sj); and amalgamates all the segments selected for each line to obtain the region of interest; wherein the segment Sj is excluded from the region of interest if the length of this segment Sj is less than a predetermined minimum length. - View Dependent Claims (25, 26)
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Specification