Salience estimation for object-based visual attention model
The present invention provides a salience estimation method for object-based visual attention model. The method comprises steps of segmenting the image into a plurality of objects to be estimated, extracting feature maps for each segmented object, calculating the saliences of each segmented object in a set of circles defined around a center pixel of the object based on the extracted feature maps, and integrating the saliences of each segmented object in all circles in order to achieve an overall salience estimation for each segmented object. The present invention is much more human vision inosculated and of low computing complexity.
1. A method for detecting an object in a digital picture, comprising the steps of:
segmenting the image into a plurality of separate objects; for an object,
extracting a feature value for the object as a function of pixels of the object, the feature value comprising at least one of luminance intensity and color, wherein when extracting the feature value of an object, if the number of plurality of pixels in the object whose feature values fall into a range exceeds a predetermined threshold compared with the total number of pixels in the object, the average of the feature values of the plurality of pixels is extracted as the feature value of the object;
selecting the object's neighboring area said neighboring area being circular around the object:
weighting an average difference between the feature value of the object and the feature value of each of other objects in the neighboring area by using a size of each of other objects to obtain a weighted average feature difference of the object; and
selecting an object from the plurality of objects according to their weighted average feature difference as the detected object.
2. The method according to claim 1 , wherein for the object, multiple neighboring areas can be selected in said step of selecting the object's neighboring area, and said step of weighting the average difference between the feature value of the object and the feature value of each of other objects in the neighboring area is performed in each neighboring area to get a total weighted average feature difference by linearly summing up all the weighted average feature difference of the object in each neighboring area.
3. The method according to claim 2 , wherein if there are multiple neighboring areas, these multiple neighboring areas are concentrically circular.
4. The method according to claim 3 , wherein the neighboring area of the object is centered by a center pixel of the object.
5. The method according to claim 1 , wherein the size of each of other objects is the number of pixels therein.