Alexander Nesterov,

OpenCV: DNN module

Software developer of OpenCV

Internet of Things Group 2

Dog

Cat

Deep neural network

Internet of Things Group 3

What can be done with DNN?

Learning Inference

Dog

Cat

Dog

Cat

Labels

Error

Forward Forward

weights

Internet of Things Group 4

What can be done with DNN?

Learning Inference

Dog

Cat

Dog

Cat

Labels

Error

Forward Forward

weights

Internet of Things Group 5

Dog

Cat

Deep neural network

Internet of Things Group 6

Deep neural network

Dog

Cat

Loadnetwork

Loadimage

Makeblob

Networkforward

Getoutput

Internet of Things Group 7

OpenCV DNN module

Dog

Cat

Loadnetwork

Loadimage

Makeblob

Networkforward

Getoutput

Internet of Things Group 8

OpenCV DNN moduleLoad network

Loadnetwork

Internet of Things Group 9

Loadnetwork

OpenCV DNN moduleLoad network

Internet of Things Group 10

Loadnetwork

OpenCV DNN moduleLoad network

Internet of Things Group 11

Loadnetwork

OpenCV DNN moduleLoad network

Internet of Things Group 12

Loadnetwork

OpenCV DNN moduleLoad network

Internet of Things Group 13

Loadnetwork

OpenCV DNN moduleLoad network

Internet of Things Group 14

Loadnetwork

OpenCV DNN moduleLoad network

Internet of Things Group 15

Loadnetwork

OpenCV DNN moduleLoad network

Internet of Things Group 16

Loadnetwork

OpenCV DNN moduleLoad network

Internet of Things Group 17

Loadnetwork

OpenCV DNN moduleLoad network

Internet of Things Group 18

Loadnetwork

OpenCV DNN moduleLoad network

Internet of Things Group 19

Loadnetwork

OpenCV DNN moduleLoad network

Internet of Things Group 20

Loadnetwork

OpenCV DNN moduleLoad network

Internet of Things Group 21

OpenCV DNN module

Dog

Cat

Loadnetwork

Loadimage

Makeblob

Networkforward

Getoutput

Internet of Things Group 22

Loadimage

OpenCV DNN moduleLoad image

// comment

Internet of Things Group 23

Loadimage

OpenCV DNN moduleLoad image from video

Internet of Things Group 24

OpenCV DNN module

Dog

Cat

Loadnetwork

Loadimage

Makeblob

Networkforward

Getoutput

Internet of Things Group 25

Makeblob

OpenCV DNN moduleMake blob

Internet of Things Group 26

Makeblob

OpenCV DNN moduleMake blob

NCHW

W

H

Num

C𝑵 =𝑵𝒖𝒎

𝑪

Internet of Things Group 27

Makeblob

OpenCV DNN moduleMake blob

NCHW

[𝟑 × 𝟏𝟐𝟖 × 𝟏𝟐𝟖] [𝟏 × 𝟑 × 𝟏𝟐𝟖 × 𝟏𝟐𝟖]

Internet of Things Group 28

Makeblob

OpenCV DNN moduleMake blob

𝒔𝒄𝒂𝒍𝒆 ×

H

W (𝑯,𝑾)

−𝐦𝐞𝐚𝐧𝐑

−𝐦𝐞𝐚𝐧𝐆

−𝐦𝐞𝐚𝐧𝐁

Internet of Things Group 29

OpenCV DNN module

Dog

Cat

Loadnetwork

Loadimage

Makeblob

Networkforward

Getoutput

Internet of Things Group 30

Networkforward

OpenCV DNN moduleNetwork forward

Internet of Things Group 31

OpenCV DNN module

Dog

Cat

Loadnetwork

Loadimage

Makeblob

Networkforward

Getoutput

Internet of Things Group 32

DogCat

Getoutput

OpenCV DNN moduleGet output for classification

Internet of Things Group 33