from our_mpeg import transform, inverse_transform
from our_mpeg import quantize, dequantize
from our_mpeg import zigzag, inverse_zigzag
print('loading...', flush=True)
image_data = load(sys.argv[1])
print('finished loading')
sys.stdout.flush()
im1 = image_data[0,0,0]
im2 = image_data[1,0,0]
print('encoding...')
im1_blocks = break_blocks(im1)
im1_offsets, im1_residuals = compute_reference(im1_blocks, im2)
im1_residuals_dct = transform(im1_residuals)
im1_residuals_q = quantize(im1_residuals_dct)
im1_residuals_q_zig = zigzag(im1_residuals_q)
print('finished encoding')
print('decoding...')
im1_residuals_q_dzig = inverse_zigzag(im1_residuals_q_zig)
im1_residuals_dq = dequantize(im1_residuals_q_dzig)
im1_residuals_idct = inverse_transform(im1_residuals_dq)
im1_blocks_recovered = apply_reference(im1_offsets, im1_residuals_idct, im2)
im1_recovered = merge_blocks(im1_blocks_recovered)
print('finished decoding')
print(np.linalg.norm(im1_recovered - im1))
def decompress_image_with_reference(im1_offsets, im1_residuals_q, reference_image):
im1_residuals_dq = dequantize(im1_residuals_q)
im1_residuals_idct = inverse_transform(im1_residuals_dq)
im1_blocks_recovered = apply_reference(im1_offsets, im1_residuals_idct, reference_image)
im1_recovered = merge_blocks(im1_blocks_recovered)
return im1_recovered
import numpy as np
import sys
from our_mpeg import load
from our_mpeg import break_blocks, merge_blocks
from our_mpeg import compute_reference, apply_reference
print('loading...', flush=True)
image_data = load(sys.argv[1])
print('finished loading')
sys.stdout.flush()
test_image_1 = image_data[0,0,0]
test_image_2 = image_data[1,0,0]
print('encoding...')
im1_blocks = break_blocks(test_image_1)
im1_ref = compute_reference(im1_blocks, test_image_2)
print('finished encoding')
print('decoding...')
im1_blocks_recovered = apply_reference(im1_ref, test_image_2)
im1_recovered = merge_blocks(im1_blocks_recovered)
print('finished decoding')
print(np.linalg.norm(im1_recovered - test_image_1))