Threshold for evaluation code R-CNN

Hi Guys

I would like if possible how to make this Threshold 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')
output = selectLabels(gTruth,'signal');
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,'MiniBatchSize', 32);    
    % 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)

Answer 1

[Image Analyst]

To filter a table you can do something like this

goodRows = [results.Scores] > 0.58;
resutls = results(goodRows, :);

[Abdussalam Elhanashi]

thanks for your answer

kindly if you can where i put your answer in exactlly in my code

Answer 2

[Abdussalam Elhanashi]

hi

i got this error

Undefined operator '>' for input arguments of type 'cell'.

Error in Evaluationthedetector (line 29)
goodRows = [results.Scores] > 0.66;

[Image Analyst]

Here is an example.

LastName = {'Sanchez';'Johnson';'Li';'Diaz';'Brown'};
Age = [38;43;38;40;49];
Smoker = logical([1;0;1;0;1]);
Height = [71;69;64;67;64];
Weight = [176;163;131;133;119];
BloodPressure = [124 93; 109 77; 125 83; 117 75; 122 80];
results = table(LastName,Age,Smoker,Height,Weight,BloodPressure)
goodRows = [results.Height] > 65
results = results(goodRows, :)

You'll see

results =

5×6 table

LastName Age Smoker Height Weight BloodPressure

___________ ___ ______ ______ ______ _____________

{'Sanchez'} 38 true 71 176 124 93

{'Johnson'} 43 false 69 163 109 77

{'Li' } 38 true 64 131 125 83

{'Diaz' } 40 false 67 133 117 75

{'Brown' } 49 true 64 119 122 80

goodRows =

5×1 logical array

1

1

0

1

0

results =

3×6 table

LastName Age Smoker Height Weight BloodPressure

___________ ___ ______ ______ ______ _____________

{'Sanchez'} 38 true 71 176 124 93

{'Johnson'} 43 false 69 163 109 77

{'Diaz' } 40 false 67 133 117 75

Note how results now has fewer rows than before filtering.

Put the code right after you call struct2table.

Answer 3

[Abdussalam Elhanashi]

Hi

I put the code and i got this error

The logical indices in position 1 contain a true value outside of the array bounds.

Error in Evaluationthedetector (line 26)
    resutls = results(goodRows, :);