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training.go
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training.go
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// Package vision implements computer vision algorithms.
package vision
import (
"bytes"
"context"
"image"
"image/png"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/bson/primitive"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
"go.viam.com/rdk/rimage"
)
// TrainingImage TODO.
type TrainingImage struct {
ID primitive.ObjectID `bson:"_id" json:"id,omitempty"`
Data []byte
Labels []string
MetaData map[string]interface{}
}
// ImageTrainingStore TODO.
type ImageTrainingStore struct {
theClient *mongo.Client
theCollection *mongo.Collection
}
// NewImageTrainingStore TODO.
func NewImageTrainingStore(ctx context.Context, mongoURI, db, collection string) (*ImageTrainingStore, error) {
client, err := mongo.NewClient(options.Client().ApplyURI(mongoURI))
if err != nil {
return nil, err
}
err = client.Connect(ctx)
if err != nil {
return nil, err
}
return &ImageTrainingStore{client, client.Database(db).Collection(collection)}, nil
}
func (its *ImageTrainingStore) reset(ctx context.Context) error {
err := its.theCollection.Drop(ctx)
if err != nil {
return err
}
return its.BuildIndexes(ctx)
}
// Close TODO.
func (its *ImageTrainingStore) Close(ctx context.Context) error {
return its.theClient.Disconnect(ctx)
}
// BuildIndexes TODO.
func (its *ImageTrainingStore) BuildIndexes(ctx context.Context) error {
// TODO(erh): build indexes
return nil
}
// StoreImageFromDisk TODO.
func (its *ImageTrainingStore) StoreImageFromDisk(ctx context.Context, fn string, labels []string) (primitive.ObjectID, error) {
img, err := rimage.NewImageFromFile(fn)
if err != nil {
return primitive.ObjectID{}, err
}
md := map[string]interface{}{"filename": fn}
return its.StoreImage(ctx, img, md, labels)
}
// StoreImage TODO.
func (its *ImageTrainingStore) StoreImage(
ctx context.Context,
img image.Image,
metaData map[string]interface{},
labels []string,
) (primitive.ObjectID, error) {
ti := TrainingImage{}
ti.ID = primitive.NewObjectID()
bb := bytes.Buffer{}
err := png.Encode(&bb, img)
if err != nil {
return ti.ID, err
}
ti.Data = bb.Bytes()
ti.Labels = labels
ti.MetaData = metaData
_, err = its.theCollection.InsertOne(ctx, ti)
return ti.ID, err
}
// GetImage TODO.
func (its *ImageTrainingStore) GetImage(ctx context.Context, id primitive.ObjectID) (TrainingImage, error) {
ti := TrainingImage{}
err := its.theCollection.FindOne(ctx, bson.M{"_id": id}).Decode(&ti)
return ti, err
}
// SetLabelsForImage TODO.
func (its *ImageTrainingStore) SetLabelsForImage(ctx context.Context, id primitive.ObjectID, labels []string) error {
panic(1)
}
// GetImagesForLabel TODO.
func (its *ImageTrainingStore) GetImagesForLabel(ctx context.Context, label string) ([]primitive.ObjectID, error) {
cursor, err := its.theCollection.Find(ctx, bson.M{"labels": label}, options.Find().SetProjection(bson.M{"_id": 1}))
if err != nil {
return nil, err
}
all := []TrainingImage{}
err = cursor.All(ctx, &all)
if err != nil {
return nil, err
}
res := []primitive.ObjectID{}
for _, i := range all {
res = append(res, i.ID)
}
return res, nil
}
// GetLabels TODO.
func (its *ImageTrainingStore) GetLabels(ctx context.Context) (map[string]int, error) {
agg := mongo.Pipeline{
bson.D{{"$unwind", "$labels"}},
bson.D{{"$group", bson.D{
{"_id", "$labels"},
{"num", bson.D{{"$sum", 1}}},
}}},
}
cursor, err := its.theCollection.Aggregate(ctx, agg)
if err != nil {
return nil, err
}
type T struct {
ID string `bson:"_id"`
Num int
}
var results []T
err = cursor.All(ctx, &results)
if err != nil {
return nil, err
}
res := map[string]int{}
for _, t := range results {
res[t.ID] = t.Num
}
return res, nil
}