How to round (or convert) an array to integer?

87 Ansichten (letzte 30 Tage)
B Duan
B Duan am 15 Nov. 2016
Kommentiert: B Duan am 15 Nov. 2016
I need to first convert multiple images to an array of intensity value and then do some calculations. I need to round up each intensity in the array first before the calculations. I tried just I1_int = round(I1_int); but it did not work as "Undefined function 'round' for input arguments of type 'struct'." Any idea would be greatly appreciated! Thank you! Here is a portion of my code.
I1_int = regionprops(M, I1, 'MeanIntensity', 'Centroid'); %Intensities of first frame
if length(I)>1
I2_int = regionprops(M, I2, 'MeanIntensity', 'Centroid'); %Intensities of last frame
Final = cell2mat({I2_int(:).MeanIntensity});
Initial = cell2mat({I1_int(:).MeanIntensity});
Percent = 100*[(Final - I2_BG) - (Initial - I1_BG)]./ (Initial- I1_BG)

Akzeptierte Antwort

Image Analyst
Image Analyst am 15 Nov. 2016
You need to call ceil() on the mean intensities, not on the measurement structure itself. Try this:
props = regionprops(M, I1, 'MeanIntensity', 'Centroid'); %Intensities of first frame
% Extract the mean intensities by themselves into a new array.
meanIntensities = [props.MeanIntensity];
% Round up to nearest integer.
I1_int = ceil(meanIntensities);
  4 Kommentare
Image Analyst
Image Analyst am 15 Nov. 2016
Walter's right. Did you even inspect what I1_int is in the workspace before you did the cell2mat() line? If you had you would have seen that I1_int is already a double vector, not a structure, so doing this I1_int(:).MeanIntensity would have thrown an error. Again, there's no need to do that. Don't over-complicate it!!
B Duan
B Duan am 15 Nov. 2016
Yes, indeed I1_int is a double vector and round to the nearest integer. Thank you so much guys.

Melden Sie sich an, um zu kommentieren.

Weitere Antworten (1)

Daniel kiracofe
Daniel kiracofe am 15 Nov. 2016
ceil() should work to round up to the nearest integer

Kategorien

Mehr zu Data Type Conversion finden Sie in Help Center und File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by