How to encode and store images in PysonDB.

Many of us find it difficult to add image to a database. PysonDB solves most of your problems now i will be showing how to store image in PysonDB

What are we doing today:

• We are going to encode a image and then decode it.
• Then we are going to store it in PysonDB.

Prerequisites

• Install pysondb via pip

pip install pysondb

Lets get started.

We are having a image as below.

file2son.png

We are going to encode it.

• We need to import base64 module first.
• It handles the base64 encoding of image.

from pysondb import db 
import base64
from PIL import Image
from io import BytesIO

x=db.getDb("fs.json")
def addimage(fi,name):
  with open(fi,"rb") as dataimg:
    raw_data=base64.b64encode(dataimg.read())
    x.add({"data":raw_data.decode('utf-8'),"name":name})

addimage("file2son.png","image12")

• We are importing pysondb,bas64
• Other two will be handled soon.

x=db.getDb("fs.json")

• This creates or connects a Json database named fs.json
• If you dont know pysonDB read this

def addimage(fi,name):
  with open(fi,"rb") as dataimg:
    raw_data=base64.b64encode(dataimg.read())
    x.add({"data":raw_data.decode('utf-8'),"name":name})

addimage("file2son.png","image12")

• We are opening a file ( here file2son.png ) in read,binary mode as dataimg.

raw_data=base64.b64encode(dataimg.read())

• This encodes all data in dataimg in base64 format.

 x.add({"data":raw_data.decode('utf-8'),"name":name})

• This piece of code stores data in pysondb database .
• See that the raw_data after encoding is decoded in 'utf-8' format.
• Else error is shown.

So finally we have the data in fs.json database.

Lets get back the image

def getimage(filename,name):
  img_data=x.getBy({"name":name})
  img=Image.open(BytesIO(base64.b64decode(img_data[0]['data2'])))
  img.save(filename,"PNG")

getimage("file.png","image12")

img_data=x.getBy({"name":name})

• This piece of code gets the base64 data from fs.json with the provided name.

img=Image.open(BytesIO(base64.b64decode(img_data[0]['data2'])))

• Here we are Using Image from pillow (PIL) module.
• What this code does is:
  • Opens the base64 data from fs.json
  • And BytesIO converts the data into a byte stream which is caught by the Image function and assigned to img variable.

img.save(filename,"PNG")

• This saves the img in filename (here file.png ) in PNG format
• You have file.png in the directory which was encoded and decoded.

Whole Code

from pysondb import db
import base64
from PIL import Image
from io import BytesIO

x=db.getDb("fs.json")
def addimage(fi,name):
  with open(fi,"rb") as data:
    raw_data=base64.b64encode(data.read())
    x.add({"data":raw_data.decode('utf-8'),"name":name})


addimage("file2son.png","image12")
# addimage() is used to add file2son.png image in database with name as image12

def getimage(filename,name):
  img_data=x.getBy({"name":name})
  img=img_data[0]['data2'].decode('base64'))
  img.save(filename,"PNG")
getimage("file.png","image12")
# getimage is used to retrieve the stored image of name image12 and get it as file.png

Thats for today,Follow for more blogs.

Have any doubts or am i wrong anywhere,please comment here. So that i can correct it.