Added signatue photo to (transparent) png converter script.

README.md

@@ -39,6 +39,7 @@ So far, the following projects have been integrated to this repo:
 |[Python Algebra Solver](https://github.com/hastagAB/Awesome-Python-Scripts/tree/master/Algebra-Solver)|[Sengxay Xayachack](https://github.com/frankxayachack)|
 |[Random name generator](https://github.com/hastagAB/Awesome-Python-Scripts/tree/master/Random_Names_Generator)| [Ayush Bhardwaj](https://github.com/hastagAB)|
 |[Server Ping](https://github.com/hastagAB/Awesome-Python-Scripts/tree/master/Ping_Server)|[prince]()|
+|[Signature photo to PNG converter](https://github.com/hastagAB/Awesome-Python-Scripts/tree/master/signature2png)|[Rodolfo Ferro](https://github.com/RodolfoFerro)|
 |[Simple Webpage Parser](https://github.com/hastagAB/Awesome-Python-Scripts/tree/master/SimpleWebpageParser)|[Nitish Srivastava](https://github.com/nitish-iiitd)|
 |[Slideshare downloader](https://github.com/hastagAB/Awesome-Python-Scripts/tree/master/Slideshare-Downloader)|[Chris Goes](https://github.com/GhostofGoes)|
 |[SMS your location](https://github.com/hastagAB/Awesome-Python-Scripts/tree/master/SmsYourLocation)|[prince]()|

signature2png/README.md

@@ -0,0 +1,59 @@
+# Python signature editor
+
+The present repo contains a Python script to process signature images, it returns a `png` image with transparent background containing only the signature.
+
+## Setup
+
+The Python PIL ([Python Image Library](http://pillow.readthedocs.io/en/latest/)) package with [Python 3](https://www.python.org/downloads/) is used in this repo.
+
+To install PIL via pip:
+```bash
+pip install pillow
+```
+
+## Contents
+
+The main script is [`signature.py`](https://github.com/RodolfoFerro/Signature/blob/master/scripts/signature.py), which contains a set of utility functions developed so far.
+
+### Done so far
+
+* Binarize your signature
+* Remove background and make it transparent
+
+### TODO
+
+* Smooth image
+* Image orientation
+* Crop to get only signature
+
+## Usage
+
+The main script, [`signature.py`](https://github.com/RodolfoFerro/Signature/blob/master/scripts/signature.py) requires a set of parameters that are needed in the parser.
+
+```bash
+$ python signature.py -h
+usage: signature.py [-h] -i INPUT [-o OUTPUT] [-th THRESHOLD]
+
+optional arguments:
+  -h, --help            show this help message and exit
+  -i INPUT, --input INPUT
+                        Input image.
+  -o OUTPUT, --output OUTPUT
+                        Output image.
+  -th THRESHOLD, --threshold THRESHOLD
+```
+
+An example to use this script is as follows:
+
+```bash
+$ python signature.py -i imgs/example.jpg -o imgs/result.png -th 190
+```
+
+### Results
+
+<img src="https://raw.githubusercontent.com/RodolfoFerro/Signature/master/imgs/RudolfoAnaya.jpg" width="50%"><img src="https://raw.githubusercontent.com/RodolfoFerro/Signature/master/imgs/resultado.png" width="50%">
+
+***
+
+#### Reference to:
+<https://github.com/RodolfoFerro/Signature>

signature2png/signature.py

@@ -0,0 +1,90 @@
+# ===============================================================
+# Author: Rodolfo Ferro Pérez
+# Email: ferro@cimat.mx
+# Twitter: @FerroRodolfo
+#
+# Script: Process signatures to remove background.
+#
+# ABOUT COPYING OR USING PARTIAL INFORMATION:
+# This script was originally created by Rodolfo Ferro. Any
+# explicit usage of this script or its contents is granted
+# according to the license provided and its conditions.
+# ===============================================================
+
+from PIL import Image, ImageOps
+import argparse
+
+inFile = ''
+outFile = ''
+
+
+def binarize(img, threshold=127):
+    """Utility function to binarize an image."""
+
+    for i in range(img.size[0]):
+        for j in range(img.size[1]):
+            if img.getpixel((i, j)) > threshold:
+                img.putpixel((i, j), 255)
+            else:
+                img.putpixel((i, j), 0)
+
+    return img
+
+
+def make_transparent(img):
+    """Utility function to make transparent background from image."""
+
+    img = img.convert("RGBA")
+    data = img.getdata()
+
+    transparent = []
+    for item in data:
+        if item[:3] == (255, 255, 255):
+            transparent.append((255, 255, 255, 0))
+        else:
+            transparent.append(item)
+
+    img.putdata(transparent)
+    return img
+
+
+def main(inFile, outFile, threshold=190):
+    """Main function to process image."""
+
+    img = Image.open(inFile).convert('L')
+    img = binarize(img, threshold=threshold)
+    img = make_transparent(img)
+    img.save(outFile)
+
+    return True
+
+
+def parser():
+    """Argument parser function."""
+
+    # Construct the argument parser:
+    ap = argparse.ArgumentParser()
+
+    ap.add_argument("-i", "--input",
+                    required=True,
+                    type=str,
+                    default="result.png",
+                    help="Input image.")
+
+    ap.add_argument("-o", "--output",
+                    type=str,
+                    default="result.png",
+                    help="Output image.")
+
+    ap.add_argument("-th", "--threshold",
+                    type=int,
+                    default=127)
+
+    args = vars(ap.parse_args())
+
+    return args['input'], args['output'], args['threshold']
+
+
+if __name__ == "__main__":
+    inFile, outFile, threshold = parser()
+    main(inFile, outFile, threshold=threshold)