Tests on lwz

%% Cell type:code id: tags:

``` python

from WorkingPyDemo import *

from time import time

from scipy import misc

import imageio

import png

```

%% Cell type:code id: tags:

``` python

scenes = file_extractor(folder_name)

images = image_extractor(scenes)

print(len(images))

newnamesforlater = []

file_sizes_new = []

file_sizes_old = []

list_dic = np.load("first_dic.npy", allow_pickle="TRUE")

bins = [21,32,48]

for i in range(len(images)):

    if images[i][-5:] == ".tiff":

        newname = images[i][:-5]

    else:

        newname = images[i][:-4]

    newnamesforlater.append(newname + "_Compressed.txt")

    with open(newname + "_Compressed.txt", 'wb') as f:

        f.write(inletters)

    # with open(newname + "_Compressed.txt", 'wb') as f:

    #     f.write(inletters)

    file_sizes_new.append((os.path.getsize(newname + "_Compressed.txt")))

    file_sizes_old.append((os.path.getsize(images[i])))

file_sizes_new.append(os.path.getsize("first_dic.npy"))

print(np.sum(file_sizes_new)/np.sum(file_sizes_old))

```

%% Output

    262

    0.39837348558217806

    0.3968581030135283

%% Cell type:code id: tags:

``` python

pngsizes = []

for i, filename in enumerate(images):

    newimage = Image.open(filename)

    newimage = np.array(newimage)

    newimage = newimage[1:]

    with open(newnamesforlater[i][:-4] + ".png", 'wb') as f:

        writer = png.Writer(newimage.shape[1], newimage.shape[0], greyscale=True, bitdepth=16)

        writer.write(f, newimage)

    # imageio.imwrite(newnamesforlater[i][:-4] + ".png", newimage)

    # newimage.close()

    pngsizes.append(os.path.getsize(newnamesforlater[i][:-4] + ".png"))

print(np.sum(pngsizes)/np.sum(file_sizes_old))

```

%% Output

    0.6104417990437042

%% Cell type:code id: tags:

``` python

print(os.path.getsize("1626032610_393963_0.xcf")/os.path.getsize("images/1626032610_393963/1626032610_393963_0.tiff"))

```

%% Output

    0.5676821409714287

%% Cell type:code id: tags:

``` python

print(os.path.getsize("1626032610_393963_0.png")/os.path.getsize("images/1626032610_393963/1626032610_393963_0.tiff"))

```

%% Output

    0.4855910784741866

%% Cell type:code id: tags:

``` python

for i, filename in enumerate(images):

    original = Image.open(filename)

    compressed = Image.open(newnamesforlater[i][:-4] + ".png")

    original = np.array(original)[1:]

    compressed = np.array(compressed)

    if not np.allclose(original, compressed):

        print(i)

```

%% Cell type:code id: tags:

``` python

print((np.sum(pngsizes) - np.sum(file_sizes_new))/np.sum(pngsizes))

```

%% Output

    0.34740136372336333

%% Cell type:code id: tags:

``` python

```

%% Cell type:code id: tags:

``` python

from PIL import TiffTags

TiffTags.LIBTIFF_CORE.add(318)

```

%% Cell type:code id: tags:

``` python

lwz_sizes = []

for i, filename in enumerate(images):

    newimage = Image.open(filename)

    newimage.save(newnamesforlater[i][:-4]+ "lzw" + ".tiff", compression='tiff_lzw', tiffinfo={317: 2})

    lwz_sizes.append(os.path.getsize(newnamesforlater[i][:-4]+ "lzw" + ".tiff"))

print(np.sum(lwz_sizes)/np.sum(file_sizes_old))

```

%% Output

    0.6185872808807661

%% Cell type:code id: tags:

``` python

```