Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Even better(er) binary quantization #117994

Merged
merged 14 commits into from
Dec 9, 2024
Merged

Even better(er) binary quantization #117994

Show file tree
Hide file tree
Changes from 10 commits
Commits
Show all changes
14 commits
Select commit Hold shift + click to select a range
ef6b4bb
Adding optimized scalar quantized binarization
benwtrent Dec 2, 2024
43cfc73
Merge branch 'main' into feature/even-better-binary-quantization
benwtrent Dec 3, 2024
f99b705
Moving towards using optimized scalar quantization for binary quantizer
benwtrent Dec 3, 2024
33e6003
adding more testing
benwtrent Dec 3, 2024
d86f659
adding testing
benwtrent Dec 4, 2024
bd64dd3
moving more code
benwtrent Dec 4, 2024
370c64b
Update docs/changelog/117994.yaml
benwtrent Dec 4, 2024
afa2bba
Merge remote-tracking branch 'upstream/main' into feature/even-better…
benwtrent Dec 4, 2024
368602a
fixing fmt and headers
benwtrent Dec 4, 2024
3d20c5b
Merge branch 'feature/even-better-binary-quantization' of github.com:…
benwtrent Dec 4, 2024
618c2c3
Merge remote-tracking branch 'upstream/main' into feature/even-better…
benwtrent Dec 6, 2024
d419964
java docs
benwtrent Dec 6, 2024
1c44537
Merge remote-tracking branch 'upstream/main' into feature/even-better…
benwtrent Dec 9, 2024
ef147d8
adding some format docs
benwtrent Dec 9, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 5 additions & 0 deletions docs/changelog/117994.yaml
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
pr: 117994
summary: Even better(er) binary quantization
area: Vector Search
type: enhancement
issues: []
2 changes: 2 additions & 0 deletions rest-api-spec/build.gradle
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -67,4 +67,6 @@ tasks.named("yamlRestCompatTestTransform").configure ({ task ->
task.skipTest("logsdb/20_source_mapping/include/exclude is supported with stored _source", "no longer serialize source_mode")
task.skipTest("logsdb/20_source_mapping/synthetic _source is default", "no longer serialize source_mode")
task.skipTest("search/520_fetch_fields/fetch _seq_no via fields", "error code is changed from 5xx to 400 in 9.0")
task.skipTest("search.vectors/41_knn_search_bbq_hnsw/Test knn search", "Scoring has changed in latest versions")
task.skipTest("search.vectors/42_knn_search_bbq_flat/Test knn search", "Scoring has changed in latest versions")
})
66 changes: 43 additions & 23 deletions ...c/src/yamlRestTest/resources/rest-api-spec/test/search.vectors/41_knn_search_bbq_hnsw.yml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -11,20 +11,11 @@ setup:
number_of_shards: 1
mappings:
properties:
name:
type: keyword
vector:
type: dense_vector
dims: 64
index: true
similarity: l2_norm
index_options:
type: bbq_hnsw
another_vector:
type: dense_vector
dims: 64
index: true
similarity: l2_norm
similarity: max_inner_product
index_options:
type: bbq_hnsw

Expand All @@ -33,9 +24,14 @@ setup:
index: bbq_hnsw
id: "1"
body:
name: cow.jpg
vector: [300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0]
another_vector: [115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0]
vector: [0.077, 0.32 , -0.205, 0.63 , 0.032, 0.201, 0.167, -0.313,
0.176, 0.531, -0.375, 0.334, -0.046, 0.078, -0.349, 0.272,
0.307, -0.083, 0.504, 0.255, -0.404, 0.289, -0.226, -0.132,
-0.216, 0.49 , 0.039, 0.507, -0.307, 0.107, 0.09 , -0.265,
-0.285, 0.336, -0.272, 0.369, -0.282, 0.086, -0.132, 0.475,
-0.224, 0.203, 0.439, 0.064, 0.246, -0.396, 0.297, 0.242,
-0.028, 0.321, -0.022, -0.009, -0.001 , 0.031, -0.533, 0.45,
-0.683, 1.331, 0.194, -0.157, -0.1 , -0.279, -0.098, -0.176]
# Flush in order to provoke a merge later
- do:
indices.flush:
Expand All @@ -46,9 +42,14 @@ setup:
index: bbq_hnsw
id: "2"
body:
name: moose.jpg
vector: [100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0]
another_vector: [50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120]
vector: [0.196, 0.514, 0.039, 0.555, -0.042, 0.242, 0.463, -0.348,
-0.08 , 0.442, -0.067, -0.05 , -0.001, 0.298, -0.377, 0.048,
0.307, 0.159, 0.278, 0.119, -0.057, 0.333, -0.289, -0.438,
-0.014, 0.361, -0.169, 0.292, -0.229, 0.123, 0.031, -0.138,
-0.139, 0.315, -0.216, 0.322, -0.445, -0.059, 0.071, 0.429,
-0.602, -0.142, 0.11 , 0.192, 0.259, -0.241, 0.181, -0.166,
0.082, 0.107, -0.05 , 0.155, 0.011, 0.161, -0.486, 0.569,
-0.489, 0.901, 0.208, 0.011, -0.209, -0.153, -0.27 , -0.013]
# Flush in order to provoke a merge later
- do:
indices.flush:
Expand All @@ -60,8 +61,14 @@ setup:
id: "3"
body:
name: rabbit.jpg
vector: [111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0]
another_vector: [11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0]
vector: [0.139, 0.178, -0.117, 0.399, 0.014, -0.139, 0.347, -0.33 ,
0.139, 0.34 , -0.052, -0.052, -0.249, 0.327, -0.288, 0.049,
0.464, 0.338, 0.516, 0.247, -0.104, 0.259, -0.209, -0.246,
-0.11 , 0.323, 0.091, 0.442, -0.254, 0.195, -0.109, -0.058,
-0.279, 0.402, -0.107, 0.308, -0.273, 0.019, 0.082, 0.399,
-0.658, -0.03 , 0.276, 0.041, 0.187, -0.331, 0.165, 0.017,
0.171, -0.203, -0.198, 0.115, -0.007, 0.337, -0.444, 0.615,
-0.657, 1.285, 0.2 , -0.062, 0.038, 0.089, -0.068, -0.058]
# Flush in order to provoke a merge later
- do:
indices.flush:
Expand All @@ -73,20 +80,33 @@ setup:
max_num_segments: 1
---
"Test knn search":
- requires:
capabilities:
- method: POST
path: /_search
capabilities: [ optimized_scalar_quantization_bbq ]
test_runner_features: capabilities
reason: "BBQ scoring improved and changed with optimized_scalar_quantization_bbq"
- do:
search:
index: bbq_hnsw
body:
knn:
field: vector
query_vector: [ 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0]
query_vector: [0.128, 0.067, -0.08 , 0.395, -0.11 , -0.259, 0.473, -0.393,
0.292, 0.571, -0.491, 0.444, -0.288, 0.198, -0.343, 0.015,
0.232, 0.088, 0.228, 0.151, -0.136, 0.236, -0.273, -0.259,
-0.217, 0.359, -0.207, 0.352, -0.142, 0.192, -0.061, -0.17 ,
-0.343, 0.189, -0.221, 0.32 , -0.301, -0.1 , 0.005, 0.232,
-0.344, 0.136, 0.252, 0.157, -0.13 , -0.244, 0.193, -0.034,
-0.12 , -0.193, -0.102, 0.252, -0.185, -0.167, -0.575, 0.582,
-0.426, 0.983, 0.212, 0.204, 0.03 , -0.276, -0.425, -0.158]
k: 3
num_candidates: 3

# Depending on how things are distributed, docs 2 and 3 might be swapped
# here we verify that are last hit is always the worst one
- match: { hits.hits.2._id: "1" }

- match: { hits.hits.0._id: "1" }
- match: { hits.hits.1._id: "3" }
- match: { hits.hits.2._id: "2" }
---
"Test bad quantization parameters":
- do:
Expand Down
66 changes: 43 additions & 23 deletions ...c/src/yamlRestTest/resources/rest-api-spec/test/search.vectors/42_knn_search_bbq_flat.yml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -11,20 +11,11 @@ setup:
number_of_shards: 1
mappings:
properties:
name:
type: keyword
vector:
type: dense_vector
dims: 64
index: true
similarity: l2_norm
index_options:
type: bbq_flat
another_vector:
type: dense_vector
dims: 64
index: true
similarity: l2_norm
similarity: max_inner_product
index_options:
type: bbq_flat

Expand All @@ -33,9 +24,14 @@ setup:
index: bbq_flat
id: "1"
body:
name: cow.jpg
vector: [300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0, 230.0, 300.33, -34.8988, 15.555, -200.0]
another_vector: [115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0, 130.0, 115.0, -1.02, 15.555, -100.0]
vector: [0.077, 0.32 , -0.205, 0.63 , 0.032, 0.201, 0.167, -0.313,
0.176, 0.531, -0.375, 0.334, -0.046, 0.078, -0.349, 0.272,
0.307, -0.083, 0.504, 0.255, -0.404, 0.289, -0.226, -0.132,
-0.216, 0.49 , 0.039, 0.507, -0.307, 0.107, 0.09 , -0.265,
-0.285, 0.336, -0.272, 0.369, -0.282, 0.086, -0.132, 0.475,
-0.224, 0.203, 0.439, 0.064, 0.246, -0.396, 0.297, 0.242,
-0.028, 0.321, -0.022, -0.009, -0.001 , 0.031, -0.533, 0.45,
-0.683, 1.331, 0.194, -0.157, -0.1 , -0.279, -0.098, -0.176]
# Flush in order to provoke a merge later
- do:
indices.flush:
Expand All @@ -46,9 +42,14 @@ setup:
index: bbq_flat
id: "2"
body:
name: moose.jpg
vector: [100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0, -0.5, 100.0, -13, 14.8, -156.0]
another_vector: [50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120, -0.5, 50.0, -1, 1, 120]
vector: [0.196, 0.514, 0.039, 0.555, -0.042, 0.242, 0.463, -0.348,
-0.08 , 0.442, -0.067, -0.05 , -0.001, 0.298, -0.377, 0.048,
0.307, 0.159, 0.278, 0.119, -0.057, 0.333, -0.289, -0.438,
-0.014, 0.361, -0.169, 0.292, -0.229, 0.123, 0.031, -0.138,
-0.139, 0.315, -0.216, 0.322, -0.445, -0.059, 0.071, 0.429,
-0.602, -0.142, 0.11 , 0.192, 0.259, -0.241, 0.181, -0.166,
0.082, 0.107, -0.05 , 0.155, 0.011, 0.161, -0.486, 0.569,
-0.489, 0.901, 0.208, 0.011, -0.209, -0.153, -0.27 , -0.013]
# Flush in order to provoke a merge later
- do:
indices.flush:
Expand All @@ -59,9 +60,14 @@ setup:
index: bbq_flat
id: "3"
body:
name: rabbit.jpg
vector: [111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0, 0.5, 111.3, -13.0, 14.8, -156.0]
another_vector: [11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0, -0.5, 11.0, 0, 12, 111.0]
vector: [0.139, 0.178, -0.117, 0.399, 0.014, -0.139, 0.347, -0.33 ,
0.139, 0.34 , -0.052, -0.052, -0.249, 0.327, -0.288, 0.049,
0.464, 0.338, 0.516, 0.247, -0.104, 0.259, -0.209, -0.246,
-0.11 , 0.323, 0.091, 0.442, -0.254, 0.195, -0.109, -0.058,
-0.279, 0.402, -0.107, 0.308, -0.273, 0.019, 0.082, 0.399,
-0.658, -0.03 , 0.276, 0.041, 0.187, -0.331, 0.165, 0.017,
0.171, -0.203, -0.198, 0.115, -0.007, 0.337, -0.444, 0.615,
-0.657, 1.285, 0.2 , -0.062, 0.038, 0.089, -0.068, -0.058]
# Flush in order to provoke a merge later
- do:
indices.flush:
Expand All @@ -73,19 +79,33 @@ setup:
max_num_segments: 1
---
"Test knn search":
- requires:
capabilities:
- method: POST
path: /_search
capabilities: [ optimized_scalar_quantization_bbq ]
test_runner_features: capabilities
reason: "BBQ scoring improved and changed with optimized_scalar_quantization_bbq"
- do:
search:
index: bbq_flat
body:
knn:
field: vector
query_vector: [ 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0, -0.5, 90.0, -10, 14.8, -156.0]
query_vector: [0.128, 0.067, -0.08 , 0.395, -0.11 , -0.259, 0.473, -0.393,
0.292, 0.571, -0.491, 0.444, -0.288, 0.198, -0.343, 0.015,
0.232, 0.088, 0.228, 0.151, -0.136, 0.236, -0.273, -0.259,
-0.217, 0.359, -0.207, 0.352, -0.142, 0.192, -0.061, -0.17 ,
-0.343, 0.189, -0.221, 0.32 , -0.301, -0.1 , 0.005, 0.232,
-0.344, 0.136, 0.252, 0.157, -0.13 , -0.244, 0.193, -0.034,
-0.12 , -0.193, -0.102, 0.252, -0.185, -0.167, -0.575, 0.582,
-0.426, 0.983, 0.212, 0.204, 0.03 , -0.276, -0.425, -0.158]
k: 3
num_candidates: 3

# Depending on how things are distributed, docs 2 and 3 might be swapped
# here we verify that are last hit is always the worst one
- match: { hits.hits.2._id: "1" }
- match: { hits.hits.0._id: "1" }
- match: { hits.hits.1._id: "3" }
- match: { hits.hits.2._id: "2" }
---
"Test bad parameters":
- do:
Expand Down
4 changes: 3 additions & 1 deletion server/src/main/java/module-info.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -459,7 +459,9 @@
org.elasticsearch.index.codec.vectors.ES815HnswBitVectorsFormat,
org.elasticsearch.index.codec.vectors.ES815BitFlatVectorFormat,
org.elasticsearch.index.codec.vectors.es816.ES816BinaryQuantizedVectorsFormat,
org.elasticsearch.index.codec.vectors.es816.ES816HnswBinaryQuantizedVectorsFormat;
org.elasticsearch.index.codec.vectors.es816.ES816HnswBinaryQuantizedVectorsFormat,
org.elasticsearch.index.codec.vectors.es818.ES818BinaryQuantizedVectorsFormat,
org.elasticsearch.index.codec.vectors.es818.ES818HnswBinaryQuantizedVectorsFormat;

provides org.apache.lucene.codecs.Codec
with
Expand Down
14 changes: 14 additions & 0 deletions server/src/main/java/org/elasticsearch/index/codec/vectors/BQVectorUtils.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,20 @@ public static boolean isUnitVector(float[] v) {
return Math.abs(l1norm - 1.0d) <= EPSILON;
}

public static void packAsBinary(byte[] vector, byte[] packed) {
for (int i = 0; i < vector.length;) {
byte result = 0;
for (int j = 7; j >= 0 && i < vector.length; j--) {
assert vector[i] == 0 || vector[i] == 1;
result |= (byte) ((vector[i] & 1) << j);
++i;
}
int index = ((i + 7) / 8) - 1;
assert index < packed.length;
packed[index] = result;
}
}

public static int discretize(int value, int bucket) {
return ((value + (bucket - 1)) / bucket) * bucket;
}
Expand Down
Loading