/
image_enhancement_predictor.go
160 lines (132 loc) · 4 KB
/
image_enhancement_predictor.go
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package predictor
import (
"bytes"
"context"
"io/ioutil"
"strings"
opentracing "github.com/opentracing/opentracing-go"
"github.com/pkg/errors"
"github.com/rai-project/config"
"github.com/rai-project/dlframework"
"github.com/rai-project/dlframework/framework/agent"
"github.com/rai-project/dlframework/framework/options"
common "github.com/rai-project/dlframework/framework/predictor"
"github.com/rai-project/tensorflow"
"github.com/rai-project/tracer"
tf "github.com/tensorflow/tensorflow/tensorflow/go"
gotensor "gorgonia.org/tensor"
)
type ImageEnhancementPredictor struct {
*ImagePredictor
inputLayer string
imagesLayer string
images interface{}
}
func NewImageEnhancementPredictor(model dlframework.ModelManifest, opts ...options.Option) (common.Predictor, error) {
ctx := context.Background()
span, ctx := tracer.StartSpanFromContext(ctx, tracer.APPLICATION_TRACE, "new_predictor")
defer span.Finish()
modelInputs := model.GetInputs()
if len(modelInputs) != 1 {
return nil, errors.New("number of inputs not supported")
}
firstInputType := modelInputs[0].GetType()
if strings.ToLower(firstInputType) != "image" {
return nil, errors.New("input type not supported")
}
predictor := new(ImageEnhancementPredictor)
return predictor.Load(ctx, model, opts...)
}
func (self *ImageEnhancementPredictor) Load(ctx context.Context, modelManifest dlframework.ModelManifest, opts ...options.Option) (common.Predictor, error) {
pred, err := self.ImagePredictor.Load(ctx, modelManifest, opts...)
if err != nil {
return nil, err
}
p := &ImageEnhancementPredictor{
ImagePredictor: pred,
}
model, err := ioutil.ReadFile(p.GetGraphPath())
if err != nil {
return nil, errors.Wrapf(err, "cannot read %s", p.GetGraphPath())
}
modelReader := bytes.NewReader(model)
p.inputLayer, err = p.GetInputLayerName(modelReader, "input_layer")
if err != nil {
return nil, errors.Wrap(err, "failed to get the input layer name")
}
p.imagesLayer, err = p.GetOutputLayerName(modelReader, "output_layer")
if err != nil {
return nil, errors.Wrap(err, "failed to get the images layer name")
}
return p, nil
}
// Predict ...
func (p *ImageEnhancementPredictor) Predict(ctx context.Context, data interface{}, opts ...options.Option) error {
p.images = makeUniformImage()
if data == nil {
return errors.New("input data nil")
}
input, ok := data.([]*gotensor.Dense)
if !ok {
return errors.New("input data is not slice of dense tensors")
}
session := p.tfSession
graph := p.tfGraph
tensor, err := makeTensorFromGoTensors(input)
if err != nil {
return err
}
sessionSpan, ctx := tracer.StartSpanFromContext(ctx, tracer.MODEL_TRACE, "c_predict",
opentracing.Tags{
"evaluation_trace_level": p.TraceLevel(),
})
err = p.cuptiStart(ctx)
if err != nil {
return err
}
fetches, err := session.Run(ctx,
map[tf.Output]*tf.Tensor{
graph.Operation(p.inputLayer).Output(0): tensor,
},
[]tf.Output{
graph.Operation(p.imagesLayer).Output(0),
},
nil,
p.runOptions(),
p.GetGraphPath(),
)
p.cuptiClose()
sessionSpan.Finish()
if err != nil {
return errors.Wrapf(err, "failed to perform session.Run")
}
p.images = fetches[0].Value()
return nil
}
// ReadPredictedFeatures ...
func (p *ImageEnhancementPredictor) ReadPredictedFeatures(ctx context.Context) ([]dlframework.Features, error) {
span, ctx := tracer.StartSpanFromContext(ctx, tracer.APPLICATION_TRACE, "read_predicted_features")
defer span.Finish()
e, ok := p.images.([][][][]float32)
if !ok {
return nil, errors.New("output is not of type [][][][]float32")
}
return p.CreateRawImageFeatures(ctx, e)
}
func (p ImageEnhancementPredictor) Modality() (dlframework.Modality, error) {
return dlframework.ImageEnhancementModality, nil
}
func init() {
config.AfterInit(func() {
framework := tensorflow.FrameworkManifest
agent.AddPredictor(framework, &ImageEnhancementPredictor{
ImagePredictor: &ImagePredictor{
ImagePredictor: common.ImagePredictor{
Base: common.Base{
Framework: framework,
},
},
},
})
})
}