def compress():
'''批量压缩图片并返回压缩结果'''
if model.quality_level != 'medium':
model.switch_quality_level('medium')
# 获取文件对象
files = request.files.getlist('files')
ret = []
for rawfile in files:
file = File(rawfile)
# 将二进制转为tensor
input = file.load_tensor().cuda()
data = model.encode(input)
# 保存压缩数据
fic_name = f'{file.name}.fic'
fic_path = get_path(fic_name)
File.save_binary(
{
'feat': data['feat'],
'tex': data['tex'],
'intervals': data['intervals'],
'ext': file.ext,
}, fic_path)
fic_size = path.getsize(fic_path)
# 获取原图大小
input_path = get_path(file.name_suffix('input', ext='.bmp'))
save_image(input, input_path)
input_size = path.getsize(input_path)
fic_compression_ratio = fic_size / input_size
# 待返回的结果数据
result = {
'name': fic_name,
'data': get_url(fic_name),
'size': fic_size,
'compression_ratio': fic_compression_ratio,
}
ret.append(result)
# 响应请求
response = jsonify(ret)
return response
def demo_process():
'''提供demo展示功能'''
# 获取文件对象
file = request.files['file']
file = File(file)
feature_model = request.form['feature_model']
quality_level = request.form['quality_level']
if model.quality_level != quality_level:
model.switch_quality_level(quality_level)
# 将二进制转为tensor
input = file.load_tensor().cuda()
# 输入模型，得到返回结果
e_data = model.encode(input)
d_data = model.decode(feat=e_data['feat'],
tex=e_data['tex'],
intervals=e_data['intervals'],
recon=e_data['recon'])
data = {**e_data, **d_data}
# 保存压缩数据
fic_path = get_path(f'{file.name}.fic')
File.save_binary(
{
'feat': data['feat'],
'tex': data['tex'],
'intervals': data['intervals'],
'ext': file.ext,
}, fic_path)
# fic 相关参数
fic_size = path.getsize(fic_path)
fic_bpp = get_bpp(fic_size)
# 单独保存特征以计算特征和纹理的大小
feat_path = get_path(f'{file.name}_feat.fic')
File.save_binary({
'feat': data['feat'],
}, feat_path)
# 特征相关参数
feat_size = path.getsize(feat_path)
feat_bpp = get_bpp(feat_size)
# 纹理相关参数
tex_size = fic_size - feat_size
tex_bpp = get_bpp(tex_size)
# 待保存图片
imgs = {
'input': data['input'],
'recon': data['recon'],
'resi': data['resi'],
'resi_decoded': data['resi_decoded'],
'resi_norm': data['resi_norm'],
'resi_decoded_norm': data['resi_decoded_norm'],
'output': data['output'],
}
# 将 imgs 保存并获得对应URL
img_urls = {}
for key, value in imgs.items():
# 保存图片
file_name = file.name_suffix(key, ext='.bmp')
file_path = get_path(file_name)
save_image(value, file_path)
# 返回图片url链接
img_urls[key] = get_url(file_name)
# 计算压缩率
input_name = file.name_suffix('input', ext='.bmp')
input_path = get_path(input_name)
input_size = path.getsize(input_path)
fic_compression_ratio = fic_size / input_size
# jpeg对照组处理
jpeg_name = file.name_suffix('jpeg', ext='.jpg')
jpeg_path = get_path(jpeg_name)
dichotomy_compress(input_path, jpeg_path, target_size=tex_size)
img_urls['jpeg'] = get_url(jpeg_name)
# jpeg 相关参数计算
jpeg_size = path.getsize(jpeg_path)
jpeg_compression_ratio = jpeg_size / input_size
jpeg_bpp = get_bpp(jpeg_size)
# 其他数据
input_arr = tensor_to_array(data['input'])
output_arr = tensor_to_array(data['output'])
jpeg_arr = load_image_array(jpeg_path)
# 返回的对象
ret = {
'image': img_urls,
'data': get_url(f'{file.name}.fic'),
'eval': {
'fic_bpp': fic_bpp,
'feat_bpp': feat_bpp,
'tex_bpp': tex_bpp,
'jpeg_bpp': jpeg_bpp,
'fic_compression_ratio': fic_compression_ratio,
'jpeg_compression_ratio': jpeg_compression_ratio,
'fic_psnr': psnr(input_arr, output_arr),
'fic_ssim': ssim(input_arr, output_arr),
'jpeg_psnr': psnr(input_arr, jpeg_arr),
'jpeg_ssim': ssim(input_arr, jpeg_arr),
},
'size': {
'fic': fic_size,
'input': input_size,
# 'output': fic_size,
'output': tex_size,
'feat': feat_size,
'tex': tex_size,
'jpeg': jpeg_size,
}
}
# 响应请求
response = jsonify(ret)
return response
resi_norm, intervals = tensor_normalize(resi)
resi_norm = resi_norm.cuda()
tex = e_layer.compress(resi_norm)
resi_decoded_norm = e_layer.decompress(tex)
resi_decoded = tensor_normalize(resi_decoded_norm,
intervals=intervals,
mode='anti')
output = recon + resi_decoded
# 保存压缩数据
fic_path = get_path(f'{file.name}.fic')
File.save_binary(
{
'feat': feat,
'tex': tex,
'intervals': intervals,
'ext': file.ext,
}, fic_path)
# fic 相关参数
fic_size = path.getsize(fic_path)
fic_bpp = fic_size / conf.IMAGE_PIXEL_NUM
# 单独保存特征以计算特征和纹理的大小
feat_path = get_path(f'{file.name}_feat.fic')
File.save_binary({
'feat': feat,
}, feat_path)
# 特征相关参数
feat_size = path.getsize(feat_path)
