# PILasOPENCV
Wrapper for Image functions which are used and called in the manner of the famous PIL module but work internally with OpenCV. Since there is no truetype font support for Python in OpenCV (it exists for the OpenCV C libraries) this module might be useful since it supports all kind of truetype fonts to be integrated in images. It depends on the library freetype-py. See below for more details on this.

This library can be used to migrate old PIL projects to OPENCV.

You install this module with

    pip install PILasOPENCV
    
or you donwload the module and install it with:

    python setup.py install
    
and then you change the import command at the beginning of your project files from

    from PIL import Image
    
or 

    import PIL.Image as Image
    
to

    import PILasOPENCV as Image
    
Internally no PIL or Pillow library is used anymore but the opencv module for doing all the graphical work.

Sample script:

    from __future__ import print_function

    import PILasOPENCV as Image

    # was: from PIL import Image
    
    im = Image.new("RGB", (512, 512), "white")

    im.show()
    
    testfile = "lena.jpg"

    im = Image.open(testfile)

    print(type(im))

    # JPEG (512, 512) RGB

    im.save("lena.bmp")

    im.show()

    small = im.copy()

    thsize = (128, 128)

    small.thumbnail(thsize)

    small.show()
    
    box = (100, 100, 400, 400)

    region = im.crop(box)

    print("region",region.format, region.size, region.mode)

    # region = region.transpose(Image.ROTATE_180)

    region = region.transpose(Image.ROTATE_180)

    region.show()

    im.paste(region, box)

    im.show()
     
# Export CV2/Numpy images
You can export the cv2/numpy image from an Image instance with the command getim():
    
    from __future__ import print_function

    import PILasOPENCV as Image

    import cv2

    im = Image.open("lena.jpg")

    numpy_image = im.getim()

    print(type(numpy_image), numpy_image.shape)

    cv2.imshow("numpy_image", numpy_image)

    cv2.waitKey(0)
    
# Attention:
This is a very unstable development version. Use with care. Not much testing has been done to it though tests have been done. They can be found in the tests directory.

# TO DO:
The most used classes and methods like ImageMode, ImageColor, ImageChops are implemented but have not been fully tested. Image, ImageFont, ImageDraw, ImageGrab and ImageFilter have been tested with several testcases. Some functions/methods of these classes are missing and are not implemented though. If you want to import them, import them with:

    import PILasOPENCV as Image

    import PILasOPENCV as ImageMode

    import PILasOPENCV as ImageColor

    import PILasOPENCV as ImageDraw

    import PILasOPENCV as ImageFilter

    import PILasOPENCV as ImageChops

    import PILasOPENCV as ImageFont

    import PILasOPENCV as ImageGrab
    
The PIL classes ImageEnhance, ImageFile, ImageFileIO, ImageMath, ImageOps, ImagePath, ImageQt, ImageSequence, ImageStat, ImageTk, ImageWin, ImageGL have not been implemented.
    
If you want to use the methods getsize and getmask from ImageFont you have to use them differently:

    from __future__ import print_function

    import PILasOPENCV as Image

    import PILasOPENCV as ImageDraw

    import PILasOPENCV as ImageFont

    import cv2

    # from PIL import Image, ImageDraw, ImageFont
    
    font = ImageFont.truetype("ARIAL.ttf".lower(), 18)

    im = Image.open("lena.jpg")

    draw = ImageDraw.Draw(im)

    text = "Lena's image"

    draw.text((249,455), text, font=font, fill=(0, 0, 0))

    # in PIL:

    # print(font.getsize(text))

    # mask = font.getmask(text)

    print(ImageFont.getsize(text, font))

    mask = ImageFont.getmask(text, font)

    print(type(mask))

    cv2.imshow("mask", mask)

    im.show()

If you want to fork this project, feel free to do so. Give me a message in case you are forking and improving the code.
abunkahle@t-online.de

# Dependencies:
You need to have numpy, opencv, mss and freetype installed to run the module.
Install it with 

     pip install numpy opencv-python freetype-py mss
    
# Version history:

2.1: though OpenCV does not support gif images, PILasOPENCV now can load gif images by courtesy of the library gif2numpy

2.0: disabled ImageGrab.grabclipboard() in case it throws exceptions which happens e.g. on Ubuntu/Linux

1.9: disabled ImageGrab.grabclipboard() which throw exceptions on some platforms

1.8: ImageGrab.grab() and ImageGrab.grabclipboard() implemented with dependency on mss

1.7: fixed fromarray

1.6: fixed frombytes, getdata, putdata and caught exception in case freetype-py is not installed or dll is missing 

# Licence
MIT
