Object Detection of boulders

Hello,

i am trying to detect the boulder (holds) presented in the image but am unable to do so, currently i have implemented a acf detector (stop sign detector) which dectects the red boulders only, which have bouding boxes as shown in figure 3. i now want to find out the size, colour, shape, position x and y of objects inside the bounding boxes but do not know how. Also if there is another method using image segmentation would be much appriciated in orer to solve this probelm, while i have exprimented using colour thresholding due to the conlficitng colour of the backgorund and foreground i found it hard (also new to image processing and object detection). So my question is, is there a method to maybe segment the iamges within the bouding boxes so i can use regionprops to do calculations. Also the same the probelm i found was when applying a certain image thresholding mask on this image yeilds different results on another, wanted to know if there is a method which can segment red boulders in all image, ie an algorithm that would work on figure 1 and figure 2.

figure 1

figure 2

figure 3

Answer 1

[Image Analyst]

I'm not sure you'll get all of them, especially the ones that are on those triangles.

First I'd preprocess the image by getting rid of non-wall stuff like letters and clutter in the ceiling/roof.

Then I'd probably try an edge detector and try to fill the blobs, then call regionprops. Try it yourself and attach your code if it needs improving.