GPU calculation with regionprops.Perimeter fails

I tried to calculate the perimeter and the area of an image, represented as a logical matrix, doing this:

I_merged =gpuArray(I_merged); % I_merged is the image of a circle
area= regionprops(I_merged,'Area');  
perimeter = regionprops(I_merged,'Perimeter');

Apparently i do not get any error for the calculation of the area, on the contrary for the perimeter this is what i get:

------------------------------------------------------------

Error using gpuArray/regionprops>getPropsFromInput (line 784)
Expected input number 1, PROPERTIES, to match one of these values:

'Area', 'Centroid', 'BoundingBox', 'SubarrayIdx', 'MajorAxisLength', 'MinorAxisLength', 'Eccentricity',
'Orientation', 'Image', 'Extrema', 'EquivDiameter', 'Extent', 'PixelIdxList', 'PixelList', 'PixelValues',
'WeightedCentroid', 'MeanIntensity', 'MinIntensity', 'MaxIntensity'

The input, 'Perimeter', did not match any of the valid values.

Error in gpuArray/regionprops>ParseInputs (line 749)
    reqStats = getPropsFromInput(startIdxForProp, ...

Error in gpuArray/regionprops (line 135)
[I,requestedStats,officialStats] = ParseInputs(imageSize, varargin{:});

Error in roundness_auto (line 14)
perimeter = regionprops(I_merged,'Perimeter');

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I see from this page (" https://uk.mathworks.com/help/images/ref/regionprops.html ") that GPU support is enabled for the perimeter calculation, so I do not understand what's wrong with this.

[Joss Knight]

What is the version of MATLAB that you are using?

[giuseppe vitucci]

The last one, 2017a

Answer 1

[Yuebin Zhou]

Documentation always shows information for the latest MATLAB. From the error message, it might be because you are using an older version which does not support perimeter.

[giuseppe vitucci]

I'm using the last version, 2017a.

Answer 2

[Walter]

I have the same issue on 2018a

E

rror using gpuArray/regionprops>getPropsFromInput (line 788)
Expected input number 1, PROPERTIES, to match one of these values:

'Area', 'Centroid', 'BoundingBox', 'SubarrayIdx', 'MajorAxisLength',
'MinorAxisLength', 'Eccentricity', 'Orientation', 'Image', 'Extrema',
'EquivDiameter', 'Extent', 'PixelIdxList', 'PixelList', 'PixelValues',
'WeightedCentroid', 'MeanIntensity', 'MinIntensity', 'MaxIntensity'

The input, 'Perimeter', did not match any of the valid values.
Error in gpuArray/regionprops>ParseInputs (line 753)
    reqStats = getPropsFromInput(startIdxForProp, ...
Error in gpuArray/regionprops (line 139)
[I,requestedStats,officialStats] = ParseInputs(imageSize, argin{:});

Answer 3

[Image Analyst]

There are different regionprops:

>> which -all regionprops
C:\Program Files\MATLAB\R2018a\toolbox\images\images\regionprops.p
C:\Program Files\MATLAB\R2018a\toolbox\images\images\@gpuArray\regionprops.m  % gpuArray method
C:\Program Files\MATLAB\R2018a\toolbox\images\images\regionprops.m            % Shadowed

when I edit the one in the @gpuarray folder, it shows that it does not offer perimeter as a measurement. I don't know why.

Answer 4

[giuseppe vitucci]

Well, at this point, after one year and with the same result, I think a ticket should be open... I am going to do that.