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A study of local smoothness-informed convolutional neural network models for image inpainting

 e    | 14 apr 2022
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Fig. 1

A damaged image. Ω1 is the undetectable domain, Ω2 is the detectable domain.
A damaged image. Ω1 is the undetectable domain, Ω2 is the detectable domain.

Fig. 2

Computational Framework. The 0th layer is the input (damaged image), the 39 hidden layers contain the kernels and biases, each hidden layer has 16 neurons, the last layer outputs the estimation of the real image. W × W denotes the size of the image. The upper backward line means each output back to the input layer for next training. At the first training, g0 = f. Each formula denotes the gray value of each point of the image after convolution and activation, *denotes the convolution symbol.
Computational Framework. The 0th layer is the input (damaged image), the 39 hidden layers contain the kernels and biases, each hidden layer has 16 neurons, the last layer outputs the estimation of the real image. W × W denotes the size of the image. The upper backward line means each output back to the input layer for next training. At the first training, g0 = f. Each formula denotes the gray value of each point of the image after convolution and activation, *denotes the convolution symbol.

Fig. 3

Images captured by the authors. (a) denotes the complete images, (b) denotes the damaged images.
Images captured by the authors. (a) denotes the complete images, (b) denotes the damaged images.

Fig. 4

The left image is from [16], the right one is the damaged image.
The left image is from [16], the right one is the damaged image.

Fig. 5

Inpainting results. (a) column is the complete local image, (b) column is the damaged local image, (c)–(g) columns are the outputs of the CNN trained with Ld, Leu(λ = 0.001, n = 100), Lcs(λ = 0.001, n = 100), LD(H1, β = 0.001), LD(H2, β = 0.001).
Inpainting results. (a) column is the complete local image, (b) column is the damaged local image, (c)–(g) columns are the outputs of the CNN trained with Ld, Leu(λ = 0.001, n = 100), Lcs(λ = 0.001, n = 100), LD(H1, β = 0.001), LD(H2, β = 0.001).

Fig. 6

Inpainting results. (a) column is the complete local image, (b) column is the damaged local image, (c)–(g) columns are the outputs of the CNN trained with Ld, Leu(λ = 0.001, n = 100), Lcs(λ = 0.001, n = 100), LD(H1, β = 10, 100, 10, 100, 100 orderly from the first row to the last row), LD(H2,β = 0.001, 0.001, 0.001, 0.1, 1 orderly from the first row to the last row).
Inpainting results. (a) column is the complete local image, (b) column is the damaged local image, (c)–(g) columns are the outputs of the CNN trained with Ld, Leu(λ = 0.001, n = 100), Lcs(λ = 0.001, n = 100), LD(H1, β = 10, 100, 10, 100, 100 orderly from the first row to the last row), LD(H2,β = 0.001, 0.001, 0.001, 0.1, 1 orderly from the first row to the last row).
eISSN:
2444-8656
Lingua:
Inglese
Frequenza di pubblicazione:
Volume Open
Argomenti della rivista:
Life Sciences, other, Mathematics, Applied Mathematics, General Mathematics, Physics