from skimage import io, color
from skimage.filters.rank import median
from skimage.feature import blob_dog, blob_log, blob_doh
from skimage.morphology import disk
from matplotlib import pyplot as plt


img = io.imread('RawImage.tif')
img_gray = color.rgb2gray(img)
img_filtered = median(img_gray, disk(10))

plt.figure()
plt.imshow(img_filtered, cmap='gray')
plt.title('Filtered Image')

blobs = blob_doh(img_filtered)

for blob in blobs:
    y, x, r = blob
    c = plt.Circle((x, y), r, color='red', linewidth=2, fill=False)
    plt.gca().add_patch(c)

plt.show()