MATLAB: ACTIVITY MEASURE OF AN IMAGE

edge enhancementimage activity measureimage fusionimage processing

CAN ANY ONE PLEASE SUGGEST ME HOW TO CALCULATE "ACTIVITY MEASURE OF AN EDGE ENHANCED IMAGE". I WILL BE VERY MUCH THANQ FUL IF U SEND ME AS SOON AS POSSIBLE.

Best Answer

There is more than one method, it appears, depending upon what you are trying to do.

For example, the abstract of one IEEE paper says,

"The proposed method computes a local activity measure, which is the difference between a pixel luminance and the average of its 3times3 neighborhood pixels' luminance weighted according to the spatial positioning."

I would imagine the weighting factors would be listed in the full paper.

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See my attached spatial calibration demo.

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regionprops() to get the bounding box. Each region will have a bounding box that is a row vector of 4 items. Divide the first and third members by the number of columns (not rows!) in the image, and divide the second and fourth members by the number of rows in the image.

[rows, cols, panes] = size(YourImage);
props = regionprops(BWimage, 'BoundingBox');
bbox = vertcat(props.BoundingBox);    %put all blob's boxes together
nbbox = [bbox(:,1)./cols, bbox(:,2)./rows, bbox(:,3)./cols, bbox(:,4)./rows];

Now nbbox will be normalized bounding box in the form [left_edge, bottom_edge, width, height] which can easily be converted to right edge and top edge instead of width and height.

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