Initial release

Hydra chiffre des images.py

@@ -0,0 +1,47 @@
+from PIL import Image
+
+image = Image.open("image_chiffree_hydra.png")
+data = (2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47)
+
+# image = Image.open("image_chiffree_hydra_test.png")
+# data = (2, 3, 5, 7)
+
+# image = Image.open("image_chiffree_hydra_test2.png")
+# data = (21, 36, 49, 79)
+
+img = list()
+
+#convert image to list of lists
+for y in range(sum(data)):
+    row = list()
+    for x in range(sum(data)):
+        row.append(image.getpixel((x,y)))
+    img.append(row)
+
+for loop in range(17):
+    #reorder rows
+    img_new = list()
+    offset = sum(data)-data[0]
+    for i in range(len(data)):
+        img_new = img_new + img[offset:offset+data[i]]
+        if i+1<len(data):
+            offset = offset - data[i+1]
+    img = img_new.copy()
+    #reorder columns
+    for x in range(sum(data)):
+        tmp = list()
+        offset = sum(data)-data[0]
+        for i in range(len(data)):
+            tmp = tmp + img[x][offset:offset+data[i]]
+            if i+1<len(data):
+                offset = offset - data[i+1]
+        img[x] = tmp
+
+#Rebuild image
+for y in range(sum(data)):
+    for x in range(sum(data)):
+        image.putpixel((x, y), img[y][x])
+
+image.save("image_dechiffree_hydra.png")
+image.show()
+