Threshold for evaluation the R-CNN detector

1 次查看(过去 30 天)
Hi Guys
I would like if possible how to make this Treshold for Evaluation and validation of created R-CNN object Detector, i tried to make it in the attached scripts but it does not work, I want to make Threshold for score that like below 0.58 that score and bboxes should not be appeared
Herein the code:-
load('gTruth.mat')
smokedetection = selectLabels(gTruth,'smokealarm');
if ~isfolder(fullfile('EvaluationData'))
mkdir EvaluationData
addpath('EvaluationData');
evaluationData = objectDetectorTrainingData(gTruth,...
'SamplingFactor',1,'WriteLocation','EvaluationData');
end
imds = imageDatastore(fullfile('EvaluationData'));
numImages = height(evaluationData);
result(numImages,:) = struct('Boxes',[],'Scores',[]);
for i = 1:numImages
% Read Image
I = readimage(imds,i);
% Detect the object of interest
[bboxes, scores] = detect(detector,I,'Threshold',1);
% Store result
result(i).Boxes = bboxes;
result(i).Scores = scores;
end
% Convert structure to table
results = struct2table(result);
overlap = 0.1;
% Evaluate Metrics
[ap,recall,precision] = evaluateDetectionPrecision(results...
,evaluationData(:,2),overlap);
[am,fppi,missRate] = evaluateDetectionMissRate(results,evaluationData(:,2),overlap);
% Plot Metrics
subplot(1,2,1);
plot(recall,precision);
xlabel('Recall');
ylabel('Precision');
title(sprintf('Average Precision = %.1f', ap))
grid on
subplot(1,2,2);
loglog(fppi, missRate);
xlabel('False Positives Per Image');
ylabel('Log Average Miss Rate');
title(sprintf('Log Average Miss Rate = %.1f', am))
grid on

采纳的回答

Harsha Priya Daggubati
Hi,
One possible way to get only the scores returned by ‘detect’ greater than a value, say 0.58 is to store only the score value greater than 0.58 and its corresponding bboxes in result and use it in your evaluation metrics. You can also try using Overlap Threshold option for ‘evaluateDetectionPrecision’function as mentioned in the following documentation link.
  1 个评论
Abdussalam Elhanashi
Thanks for your reply
I am looking if possible how to implement this greater than 0.58 inside the above code
Thanks

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