Convert a jpg to a list of lists

问题

I'm trying to figure out how to convert a jpg into a list of lists (using python 3.2.3) such that:

[ 
[red,blue,red,etc..],           #line1
[blue,red,yellow, etc...],      #line2
[orange,yellow,black,etc...],   #Last Line
]

Basically each list within the main list represents a horizontal line of colour values starting from the top of the image.

I thought it was going to be easy, just write a little script to extract the data from the jpg file. Hah! After looking into that I realized that was going to be a lot more work than I really want to do.

So far I'm thinking converting it to a bitmap and then writing the data into a suitable format is my best bet. Of course then I have to figure out how to extract the info from a bitmap.

Now since I'm sure other people have had to do this before, someone must know a far easier way I can go about that. I've tried looking around but haven't had any luck so far.

Thanks

回答1:

1. Install PIL and open your image:

2. Open your image AS Numpy array (make sure numpy is installed):

   image = numpy.asarray(Image.open('pic.jpg'))
   

3. Use numpy.split to split your resulting array into lists:

   lists = numpy.split(image)
   

play with your lists.

来源：https://stackoverflow.com/questions/12788087/convert-a-jpg-to-a-list-of-lists