I have a question about record generation. I don't understand why can set a word key like simple_word_0 and use it for search .
From code :
def insert_single_record(self, rec):
"""Insert an image record.
Must be implemented by derived class.
Args:
rec (dict): an image record. Will be in the format returned by
make_record
For example, rec could have the form:
{'path': 'https://pixabay.com/static/uploads/photo/2012/11/28/08/56/mona-lisa-67506_960_720.jpg',
'signature': [0, 0, 0, 0, 0, 0, 2, 2, 0, 0, 0, 0, 0, 2, 2, 2, 0, 0, 0, 0, 2, 2, 2, 2, 0 ... ]
'simple_word_0': 42252475,
'simple_word_1': 23885671,
'simple_word_10': 9967839,
'simple_word_11': 4257902,
'simple_word_12': 28651959,
'simple_word_13': 33773597,
'simple_word_14': 39331441,
'simple_word_15': 39327300,
'simple_word_16': 11337345,
'simple_word_17': 9571961,
'simple_word_18': 28697868,
'simple_word_19': 14834907,
'simple_word_2': 7434746,
'simple_word_20': 37985525,
'simple_word_21': 10753207,
'simple_word_22': 9566120,
...
'metadata': {...}
}
The number of simple words corresponds to the attribute N
"""
As I see the detail implement in elasticsearch and mongodb . I found image-match's searching step is :
generate words from signature
convert signature into word dict { 'simple_word_0': 42252475, 'simple_word_1': 23885671, 'simple_word_10': 9967839}
query for each word, get a word matched record list
do signature comparison with each word matched signature , get the high score ones.
Here, what I can't understand is step 2 and 3. The word key is assign by order, how could it be match to another pic with some differences (translation or rotation). But actually image-match is doing so , the only reason I can imagine is phash could persist feature position, is that ture ?
Hello,
I have a question about record generation. I don't understand why can set a word key like
simple_word_0and use it for search .From code :
As I see the detail implement in elasticsearch and mongodb . I found image-match's searching step is :
{ 'simple_word_0': 42252475, 'simple_word_1': 23885671, 'simple_word_10': 9967839}word matchedrecord listword matchedsignature , get the high score ones.Here, what I can't understand is step 2 and 3. The word key is assign by order, how could it be match to another pic with some differences (translation or rotation). But actually
image-matchis doing so , the only reason I can imagine is phash could persist feature position, is that ture ?If that is true, there come out another question: if phash could persist feature position , why not use some solution like simhash online query (http://www.wwwconference.org/www2007/papers/paper215.pdf) ?
Split signature into several tables/blocks, comparison times can be reduced.