Low contrast object detection

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Lak
Lak on 14 Nov 2019
I am trying to write a matlab code to draw a line over the rope in the attached photo. Probably due to the low contrast between rope (object) an the background, I was unabel to detect the edges / identify the location of the rope. Can someone help me ?
I have tried many methods including methods such as Radon transform and peak detection. But no luck so far.
Thanks in adance.

Answers (1)

JESUS DAVID ARIZA ROYETH
JESUS DAVID ARIZA ROYETH on 15 Nov 2019
I leave you an example:
close all
RGB=imread('negativo/drone_image.jpg');
BW = (RGB(:,:,1) >= 142 ) & (RGB(:,:,1) <= 178) & ...
(RGB(:,:,2) >= 93 ) & (RGB(:,:,2) <= 215) & ...
(RGB(:,:,3) >= 182 ) & (RGB(:,:,3) <= 226);
BW = imdilate(BW,strel('line',300,90));
BW = bwpropfilt(BW, 'MajorAxisLength', [500, 5262]);
imshowpair(RGB,BW,'montage')
temporal.png

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