Basic Images (65 pts)

Problem

Check out my shades! If you want the flag, I guess you should be basic like me. Good luck!

Solution

We take the RGB value (any work) of the gray pixels, and convert to ascii. This re convert from base64 to hex -> stick into new png image. repeat. I wrote a PIL program to do this, which took in the picture, and outputted into another file the base64 data. The images we get:
original:

Iteration 1:

Iteration 2:

Iteration 3:

Iteration 4:

Iteration 5:

Iteration 7:

Finally we convert this data from base64 to ascii for the flag.

Flag

tjctf{asc11_c0l0r_inc3pt1on}