mirror of https://github.com/liamg/aminal.git
339 lines
9.0 KiB
Go
339 lines
9.0 KiB
Go
package imaging
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import (
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"image"
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"testing"
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)
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func TestConvolve3x3(t *testing.T) {
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testCases := []struct {
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name string
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src image.Image
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kernel [9]float64
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options *ConvolveOptions
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want *image.NRGBA
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}{
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{
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"Convolve3x3 0x0",
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&image.NRGBA{
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Rect: image.Rect(0, 0, 0, 0),
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Stride: 0,
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Pix: []uint8{},
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},
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[9]float64{
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0, 0, 0,
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0, 1, 0,
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0, 0, 0,
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},
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nil,
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&image.NRGBA{Rect: image.Rect(0, 0, 0, 0)},
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},
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{
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"Convolve3x3 4x4 identity",
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&image.NRGBA{
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Rect: image.Rect(-1, -1, 3, 3),
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Stride: 4 * 4,
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Pix: []uint8{
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
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},
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},
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[9]float64{
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0, 0, 0,
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0, 1, 0,
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0, 0, 0,
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},
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nil,
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&image.NRGBA{
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Rect: image.Rect(0, 0, 4, 4),
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Stride: 4 * 4,
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Pix: []uint8{
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
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},
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},
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},
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{
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"Convolve3x3 4x4 abs",
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&image.NRGBA{
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Rect: image.Rect(-1, -1, 3, 3),
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Stride: 4 * 4,
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Pix: []uint8{
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
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},
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},
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[9]float64{
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0, 0, 0,
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0, -1, 0,
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0, 0, 0,
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},
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&ConvolveOptions{Abs: true},
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&image.NRGBA{
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Rect: image.Rect(0, 0, 4, 4),
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Stride: 4 * 4,
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Pix: []uint8{
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
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},
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},
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},
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{
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"Convolve3x3 4x4 bias",
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&image.NRGBA{
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Rect: image.Rect(-1, -1, 3, 3),
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Stride: 4 * 4,
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Pix: []uint8{
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
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},
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},
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[9]float64{
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0, 0, 0,
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0, 1, 0,
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0, 0, 0,
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},
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&ConvolveOptions{Bias: 0x10},
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&image.NRGBA{
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Rect: image.Rect(0, 0, 4, 4),
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Stride: 4 * 4,
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Pix: []uint8{
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0x10, 0x11, 0x12, 0x03, 0x14, 0x15, 0x16, 0x07, 0x18, 0x19, 0x1a, 0x0b, 0x1c, 0x1d, 0x1e, 0x0f,
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0x20, 0x21, 0x22, 0x13, 0x24, 0x25, 0x26, 0x17, 0x28, 0x29, 0x2a, 0x1b, 0x2c, 0x2d, 0x2e, 0x1f,
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0x30, 0x31, 0x32, 0x23, 0x34, 0x35, 0x36, 0x27, 0x38, 0x39, 0x3a, 0x2b, 0x3c, 0x3d, 0x3e, 0x2f,
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0x40, 0x41, 0x42, 0x33, 0x44, 0x45, 0x46, 0x37, 0x48, 0x49, 0x4a, 0x3b, 0x4c, 0x4d, 0x4e, 0x3f,
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},
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},
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},
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{
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"Convolve3x3 4x4 norm",
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&image.NRGBA{
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Rect: image.Rect(-1, -1, 3, 3),
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Stride: 4 * 4,
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Pix: []uint8{
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
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},
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},
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[9]float64{
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1, 1, 1,
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1, 1, 1,
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1, 1, 1,
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},
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&ConvolveOptions{Normalize: true},
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&image.NRGBA{
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Rect: image.Rect(0, 0, 4, 4),
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Stride: 4 * 4,
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Pix: []uint8{
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0x07, 0x08, 0x09, 0x03, 0x09, 0x0a, 0x0b, 0x07, 0x0d, 0x0e, 0x0f, 0x0b, 0x10, 0x11, 0x12, 0x0f,
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0x11, 0x12, 0x13, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1b, 0x1c, 0x1d, 0x1f,
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0x21, 0x22, 0x23, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2b, 0x2c, 0x2d, 0x2f,
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0x2c, 0x2d, 0x2e, 0x33, 0x2f, 0x30, 0x31, 0x37, 0x33, 0x34, 0x35, 0x3b, 0x35, 0x36, 0x37, 0x3f,
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},
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},
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},
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{
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"Convolve3x3 3x3 laplacian",
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&image.NRGBA{
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Rect: image.Rect(-1, -1, 2, 2),
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Stride: 3 * 4,
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Pix: []uint8{
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0x00, 0x01, 0x01, 0xff, 0x00, 0x01, 0x02, 0xff, 0x00, 0x01, 0x03, 0xff,
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0x00, 0x01, 0x04, 0xff, 0x10, 0x10, 0x10, 0xff, 0x00, 0x01, 0x05, 0xff,
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0x00, 0x01, 0x06, 0xff, 0x00, 0x01, 0x07, 0xff, 0x00, 0x01, 0x08, 0xff,
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},
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},
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[9]float64{
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-1, -1, -1,
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-1, 8, -1,
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-1, -1, -1,
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},
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nil,
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&image.NRGBA{
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Rect: image.Rect(0, 0, 3, 3),
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Stride: 3 * 4,
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Pix: []uint8{
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0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff,
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0x00, 0x00, 0x00, 0xff, 0x80, 0x78, 0x5c, 0xff, 0x00, 0x00, 0x00, 0xff,
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0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff,
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},
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},
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},
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}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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got := Convolve3x3(tc.src, tc.kernel, tc.options)
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if !compareNRGBA(got, tc.want, 0) {
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t.Fatalf("got result %#v want %#v", got, tc.want)
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}
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})
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}
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}
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func TestConvolve5x5(t *testing.T) {
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testCases := []struct {
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name string
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src image.Image
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kernel [25]float64
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options *ConvolveOptions
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want *image.NRGBA
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}{
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{
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"Convolve5x5 4x4 translate",
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&image.NRGBA{
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Rect: image.Rect(-1, -1, 3, 3),
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Stride: 4 * 4,
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Pix: []uint8{
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
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},
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},
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[25]float64{
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0, 0, 0, 0, 0,
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0, 0, 0, 0, 0,
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0, 0, 0, 0, 0,
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0, 0, 0, 0, 0,
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0, 0, 0, 0, 1,
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},
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nil,
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&image.NRGBA{
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Rect: image.Rect(0, 0, 4, 4),
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Stride: 4 * 4,
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Pix: []uint8{
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0x28, 0x29, 0x2a, 0x03, 0x2c, 0x2d, 0x2e, 0x07, 0x2c, 0x2d, 0x2e, 0x0b, 0x2c, 0x2d, 0x2e, 0x0f,
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0x38, 0x39, 0x3a, 0x13, 0x3c, 0x3d, 0x3e, 0x17, 0x3c, 0x3d, 0x3e, 0x1b, 0x3c, 0x3d, 0x3e, 0x1f,
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0x38, 0x39, 0x3a, 0x23, 0x3c, 0x3d, 0x3e, 0x27, 0x3c, 0x3d, 0x3e, 0x2b, 0x3c, 0x3d, 0x3e, 0x2f,
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0x38, 0x39, 0x3a, 0x33, 0x3c, 0x3d, 0x3e, 0x37, 0x3c, 0x3d, 0x3e, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
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},
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},
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},
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}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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got := Convolve5x5(tc.src, tc.kernel, tc.options)
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if !compareNRGBA(got, tc.want, 0) {
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t.Fatalf("got result %#v want %#v", got, tc.want)
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}
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})
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}
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}
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func TestNormalizeKernel(t *testing.T) {
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testCases := []struct {
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name string
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kernel []float64
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want []float64
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}{
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{
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name: "positive sum",
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kernel: []float64{
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2, 0, 2,
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0, 2, 0,
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2, 0, 2,
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},
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want: []float64{
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0.2, 0, 0.2,
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0, 0.2, 0,
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0.2, 0, 0.2,
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},
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},
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{
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name: "negative sum",
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kernel: []float64{
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-2, 0, -2,
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2, 2, 2,
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-2, 0, -2,
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},
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want: []float64{
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1, 0, 1,
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-1, -1, -1,
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1, 0, 1,
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},
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},
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{
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name: "zero sum",
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kernel: []float64{
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0, 2, 0,
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2, 0, -2,
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0, -2, 0,
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},
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want: []float64{
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0, 0.5, 0,
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0.5, 0, -0.5,
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0, -0.5, 0,
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},
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},
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{
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name: "all zero",
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kernel: []float64{
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0, 0, 0,
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0, 0, 0,
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0, 0, 0,
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},
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want: []float64{
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0, 0, 0,
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0, 0, 0,
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0, 0, 0,
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},
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},
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}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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normalizeKernel(tc.kernel)
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for i := range tc.kernel {
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if tc.kernel[i] != tc.want[i] {
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t.Fatalf("got kernel %v want %v", tc.kernel, tc.want)
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}
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}
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})
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}
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}
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func BenchmarkConvolve3x3(b *testing.B) {
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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Convolve3x3(
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testdataBranchesJPG,
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[9]float64{
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-1, -1, 0,
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-1, 0, 1,
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0, 1, 1,
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},
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nil,
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)
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}
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}
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func BenchmarkConvolve5x5(b *testing.B) {
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b.ReportAllocs()
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for i := 0; i < b.N; i++ {
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Convolve5x5(
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testdataBranchesJPG,
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[25]float64{
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-1, -1, -1, -1, 0,
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-1, -1, -1, 0, 1,
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-1, -1, 0, 1, 1,
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-1, 0, 1, 1, 1,
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0, 1, 1, 1, 1,
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},
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nil,
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)
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}
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}
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