// DetectImage computes features and then calls Detect.
func DetectImage(im image.Image, phi feat.Image, pad feat.Pad, scorer slide.Scorer, shape PadRect, detopts DetFilter, suppropts SupprFilter) ([]Det, error) {
f, err := feat.ApplyPad(phi, im, pad)
if err != nil {
return nil, err
}
return Detect(f, pad.Margin, phi.Rate(), scorer, shape, detopts, suppropts)
}
// Constructs a feature pyramid.
// Extends each level by a margin before computing features.
func NewPad(images *imgpyr.Pyramid, phi feat.Image, pad feat.Pad) (*Pyramid, error) {
feats := make([]*rimg64.Multi, len(images.Levels))
for i, im := range images.Levels {
var err error
f, err := feat.ApplyPad(phi, im, pad)
if err != nil {
return nil, err
}
feats[i] = f
}
log.Print("finished computing feature transform: ", len(images.Levels))
return &Pyramid{images, feats, phi.Rate(), pad.Margin}, nil
}
func (pyr *Generator) Next(curr *Level) (*Level, error) {
t := time.Now()
im := pyr.Image.Next(curr.Image)
pyr.DurResize += time.Since(t)
if im == nil {
return nil, nil
}
t = time.Now()
x, err := feat.ApplyPad(pyr.Transform, im.Image, pyr.Pad)
pyr.DurFeat += time.Since(t)
if err != nil {
return nil, err
}
return &Level{im, x}, nil
}