Image feature extraction Python skimage blob_dog

Question

I am trying to extract features from images using:

def process_image(image_fp):
    image_ = imread(image_fp)
    image_ = resize(image_, (300, 200,3))
    image=equalize_hist(rgb2gray(image_))
    edges = skimage.feature.blob_dog(image)
    return edges.reshape(edges.size).tolist()

where image_fp is an image path.

I am having a problem due to the different sizes of the return. In general, the reshape guarantees the same size in the others algorithms.

Is there a way to get always the same size?

I only see a way: to truncate the lists (the stupid way).

Answer 1

Please read through the scikit documentation that is found here and I am assuming that you have gone through the method through which it calculates blobs in the images. If not the link is here. It return the 2D array of arrays with 3 values in each array, giving coordinates and std.deviation of Gaussian of the blob found. The length of the array returned is the number of blobs it has found in the image. So eliminating elements from that array by resizing it, is a wrong way of approach and may eliminate the features which you might find important.