Quickstart.md

Quickstart

This Quickstart suit for those people who want to search something but do not know how to extract image or text to features. Other people please refer to APILowLevel.md .

Vearch is aimed to build a simple and fast image retrieval system. Through this system, you can easily build your own image retrieval system, including image object detection, feature extraction and similarity search. This quickstart demonstrates how to use it.

Before you begin

1. Deploy Vearch system referred to Deploy.md.

For testing you can download coco data, or use the images in images folder we choose from coco data. For more details, you can refer test folder in plugin.src

Different from APILowLevel.md

This API is similar to APILowLevel.md, and plugin can perfectly adapt to it, you can use any method defined in APILowLevel.md by plugin. However, if you already have features, I suggest you use APILowLevel.md directly.

The difference:

• The name of db can not be one of ['_cluster', 'list', 'db', 'space'].
• Can not use _msearch method.
• Replace the feature field with the object requiring the feature, refer to insert or search demo.

Deploy your own plugin service

This requires only two operations:

1. Modify parameters in src/config.py;
2. Execution script: For image, bash ./bin/run.sh image ; For video, bash ./bin/run.sh video; For text, bash ./bin/run.sh text ;

Create a database and space

Before inserting and searching, you should create a database and space. Use the following curl command to create a new database and space.

# create a db which name test
curl -XPUT -H "content-type:application/json" -d '{"name": "test"}' http://127.0.0.1:4101/db/_create

# create a space in test db which name test too.
curl -XPUT -H "content-type: application/json" -d' { "name": "test",
"dynamic_schema": "strict", "partition_num": 2, "replica_num": 1, "engine":
{"name":"gamma","index_size":10000,	"retrieval_type": "IVFPQ", "retrieval_param": {"metric_type": "InnerProduct","ncentroids": -1,"nsubvector": -1}}, "properties": { "url": { "type": "keyword", "index":true}, "feature1": { "type": "vector", "dimension":512, "format": "normalization"}}} ' http://127.0.0.1:4101/space/test/_create

A successful response looks like this:

# create db
{"code":200,"msg":"success","data":{"id":1,"name":"test"}}

# create space
{"code":200,"msg":"success","data":{"id":1,"name":"test","version":2,"db_id":1,"enabled":true,"partitions":[{"id":1,"space_id":1,"db_id":1,"partition_slot":0,"replicas":[180]},{"id":2,"space_id":1,"db_id":1,"partition_slot":2147483647,"replicas":[180]}],"partition_num":2,"replica_num":1,"properties":{ "url": { "type": "keyword", "index":true}, "feature1": { "type": "vector", "dimension":512, "format": "normalization"}},"engine":{"name":"gamma","index_size":10000,"max_size":100000,"metric_type":"InnerProduct","retrieval_type":"IVFPQ","retrieval_param":{"metric_type": "InnerProduct","ncentroids": -1,"nsubvector": -1}}}}

Delete a database and space

If you want delete a database and space. Use the following curl command to delete a database and space

curl -XDELETE http://127.0.0.1:4101/space/test/test
curl -XDELETE http://127.0.0.1:4101/db/test

A successful response looks like this:

{"code":200,"msg":"success"}

Insert data into space

We support both single and bulk imports. Use the following curl command to insert single data into space.

The method of single import demo:

# single insert
curl -XPOST -H "content-type: application/json"  -d' { "url": "../images/COCO_val2014_000000123599.jpg", "feature1":{"feature":"../images/COCO_val2014_000000123599.jpg"}} ' http://127.0.0.1:4101/test/test/AW63W9I4JG6WicwQX_RC

A successful response like this:

{"_index":"test","_type":"test","_id":"AW63W9I4JG6WicwQX_RC","status":201,"_version":1,"_shards":{"total":0,"successful":1,"failed":0},"result":"created","_seq_no":1,"_primary_term":1}

Get record by ID

Use the following curl command to get a record by ID

# request
curl -XGET http://127.0.0.1:4101/test/test/AW63W9I4JG6WicwQX_RC

# response
{"_index":"test","_type":"test","_id":"AW63W9I4JG6WicwQX_RC","found":true,"_version":1,"_source":{"url":"../images/COCO_val2014_000000123599.jpg"}}

Delete record by ID

Use the following curl command to delete a record by ID

# request
curl -XDELETE http://127.0.0.1:4101/test/test/AWz2IFBSJG6WicwQVTog

# response
{"_index":"test","_type":"test","_id":"AW63W9I4JG6WicwQX_RC","status":200,"_version":0,"_shards":{"total":0,"successful":1,"failed":0},"result":"unknow","_seq_no":1,"_primary_term":1}

Update record by ID

Use the following curl command to update a record by ID

# request
curl -XPOST -H "content-type: application/json"  -d '{"doc": {"url":"1"}}' http://127.0.0.1:4101/test/test/AW63W9I4JG6WicwQX_RC/_update

# response
{"_index":"test","_type":"test","_id":"AW63W9I4JG6WicwQX_RC","status":200,"_version":1,"_shards":{"total":0,"successful":1,"failed":0},"result":"updated","_seq_no":1,"_primary_term":1}

Search similar result from space

You can search using an image URI for an publicly accessible online image or an image stored in images folders.

Search using an image stored in images folders or image URI on Internet. Use the following curl command to search similar result from space

curl -H "content-type: application/json" -XPOST -d '{ "query": { "sum": [{"feature":"../images/COCO_val2014_000000123599.jpg", "field":"feature1"}]}}' http://127.0.0.1:4101/test/test/_search

A successful response looks like this:

{"took":14,"timed_out":false,"_shards":{"total":2,"failed":0,"successful":2},"hits":{"total":1,"max_score":0.9999997615814209,"hits":[{"_index":"test","_type":"test","_id":"AW8OftTLJG6WicwQyAt2","_score":0.9999997615814209,"_extra":{"vector_result":[{"field":"feature1","source":"","score":0.9999997615814209}]},"_version":1,"_source":{"url":"../images/COCO_val2014_000000123599.jpg"}}]}}

search result look like this