https://github.com/octu0/wavelet

a simple wavelet
https://github.com/octu0/wavelet

golang haar-wavelet-tranforms wavelet-transform

Last synced: 4 months ago
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a simple wavelet

• Host: GitHub
• URL: https://github.com/octu0/wavelet
• Owner: octu0
• License: mit
• Created: 2023-03-12T09:27:03.000Z (over 2 years ago)
• Default Branch: master
• Last Pushed: 2023-04-28T09:56:50.000Z (about 2 years ago)
• Last Synced: 2024-12-30T03:43:14.996Z (6 months ago)
• Topics: golang, haar-wavelet-tranforms, wavelet-transform
• Language: Go
• Homepage:
• Size: 1.22 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# `wavelet`

simple wavelet implementation.

### Example

```go

package main

import (

	"math"

	"github.com/octu0/wavelet"

)

func main() {

	high, low := wavelet.Haar([]float64{1.0, 2.0, 3.0, 4.0, 5.0, 8.0})

	println(high) // => [2.12.., 4.94.., 9.19]

	println(low)  // => [-0.707.., -0.707.., -2.12..]

	out := wavelet.InverseHaar(high, low)

	println(out)  // => [0.999, 1.999, 3.000, 3.999, 5.000, 7.999]

	for i, v := range out {

		out[i] = math.Ceil(v)

	}

	println(out)  // => [1, 2, 3, 5, 8]

}

```

### Example RGBA

An example of converting an image to an intermediate format is implemented in [_example](https://github.com/octu0/wavelet/tree/master/_example)

source image 

| original      |                                     |

| :-----------: | :---------------------------------: |

| source        | ![img](_example/src.png)            |

| intermediate  | ![img](_example/intermediate.png)   |

| substract 55% | ![img](_example/substract_0.55.png) |

| substract 75% | ![img](_example/substract_0.75.png) |

| substract 85% | ![img](_example/substract_0.85.png) |

| substract 95% | ![img](_example/substract_0.95.png) |

| inverse       | ![img](_example/inverse.png)        |

| runlength-enc | 104KB                               |

| runlength-dec | ![img](_example/decoded.png)        |

# License

MIT, see LICENSE file for details.