官网对超分能力的介绍：https://www.volcengine.com/docs/86081/1660419
快速入门里面对于如何获得key已经有详细介绍了：https://www.volcengine.com/docs/86081/1660009
问题出现在获得这些之后，如何进行后续的相关操作，也就是上传图片，并返回得到处理过后的图片。
文档中心有一个基础的教程https://www.volcengine.com/docs/6444/1390583，我是用的是python的版本
为了传入url，我使用了gitee作为媒介，当然使用github也是一样的，但是我这里github不稳定，就使用git了
接下来遇到的第一个问题是图片解码一直出错，这个我尝试修改了图片的格式也没有解决，后来莫名其妙就自己好了，我都怀疑是不是因为服务开通的时间有延迟？
第二个问题就是官方给的例子，拿到最后的是base64的码流，当然可以使用网页在线转（我一开始就是这么干的），https://www.base64decode.org/
这样到底不方便，后面从网上搜了一段直接能够转化的python代码，和原始的代码拼到一起，就可以直接将处理的图像保存到本地了。
下面直接附上完整代码，当然key已经被我删除了。
python
import json
import sys
import os
import base64
import datetime
import hashlib
import hmac
import requests
method = 'POST'
host = 'visual.volcengineapi.com'
region = 'cn-north-1'
endpoint = 'https://visual.volcengineapi.com'
service = 'cv'
def sign(key, msg):
return hmac.new(key, msg.encode('utf-8'), hashlib.sha256).digest()
def getSignatureKey(key, dateStamp, regionName, serviceName):
kDate = sign(key.encode('utf-8'), dateStamp)
kRegion = sign(kDate, regionName)
kService = sign(kRegion, serviceName)
kSigning = sign(kService, 'request')
return kSigning
def formatQuery(parameters):
request_parameters_init = ''
for key in sorted(parameters):
request_parameters_init += key + '=' + parameters[key] + '&'
request_parameters = request_parameters_init[:-1]
return request_parameters
def save_base64_image(base64_data, output_path):
# 移除可能的前缀
if "base64," in base64_data:
base64_data = base64_data.split("base64,")[1]
# 解码并保存图片
with open(output_path, "wb") as f:
f.write(base64.b64decode(base64_data))
print(f"图片已保存至 {output_path}")
def signV4Request(access_key, secret_key, service, req_query, req_body):
if access_key is None or secret_key is None:
print('No access key is available.')
sys.exit()
t = datetime.datetime.utcnow()
current_date = t.strftime('%Y%m%dT%H%M%SZ')
# current_date = '20210818T095729Z'
datestamp = t.strftime('%Y%m%d') # Date w/o time, used in credential scope
canonical_uri = '/'
canonical_querystring = req_query
signed_headers = 'content-type;host;x-content-sha256;x-date'
payload_hash = hashlib.sha256(req_body.encode('utf-8')).hexdigest()
content_type = 'application/json'
canonical_headers = 'content-type:' + content_type + '\n' + 'host:' + host + \
'\n' + 'x-content-sha256:' + payload_hash + \
'\n' + 'x-date:' + current_date + '\n'
canonical_request = method + '\n' + canonical_uri + '\n' + canonical_querystring + \
'\n' + canonical_headers + '\n' + signed_headers + '\n' + payload_hash
# print(canonical_request)
algorithm = 'HMAC-SHA256'
credential_scope = datestamp + '/' + region + '/' + service + '/' + 'request'
string_to_sign = algorithm + '\n' + current_date + '\n' + credential_scope + '\n' + hashlib.sha256(
canonical_request.encode('utf-8')).hexdigest()
# print(string_to_sign)
signing_key = getSignatureKey(secret_key, datestamp, region, service)
# print(signing_key)
signature = hmac.new(signing_key, (string_to_sign).encode(
'utf-8'), hashlib.sha256).hexdigest()
# print(signature)
authorization_header = algorithm + ' ' + 'Credential=' + access_key + '/' + \
credential_scope + ', ' + 'SignedHeaders=' + \
signed_headers + ', ' + 'Signature=' + signature
# print(authorization_header)
headers = {'X-Date': current_date,
'Authorization': authorization_header,
'X-Content-Sha256': payload_hash,
'Content-Type': content_type
}
# print(headers)
# ************* SEND THE REQUEST *************
request_url = endpoint + '?' + canonical_querystring
print('\nBEGIN REQUEST++++++++++++++++++++++++++++++++++++')
print('Request URL = ' + request_url)
try:
r = requests.post(request_url, headers=headers, data=req_body)
# print(r.text.type())
# print(r.text['binary_data_base64'])
except Exception as err:
print(f'error occurred: {err}')
raise
else:
print('\nRESPONSE++++++++++++++++++++++++++++++++++++')
print(f'Response code: {r.status_code}\n')
# 使用 replace 方法将 \u0026 替换为 &
resp_str = r.text.replace("\\u0026", "&")
print(f'Response body: {resp_str}\n')
content = resp_str.split('"binary_data_base64":[')[1]
content = content.split('"]},"message"')[0]
save_base64_image(content, "fig12.jpg")
if __name__ == "__main__":
# 请求凭证，从访问控制申请
# import base64
# import requests
# url = "https://gitee.com/bq2w/pic_paper/raw/master/fig4.jpg"
# response = requests.get(url)
# image_base64 = base64.b64encode(response.content).decode("utf-8")
access_key = '' #your key
secret_key = ''
# 请求Query，按照接口文档中填入即可
query_params = {
'Action': 'CVProcess',
'Version': '2022-08-31',
}
formatted_query = formatQuery(query_params)
# 请求Body，按照接口文档中填入即可
body_params = {
#"req_key": "lens_vida_nnsr",
"req_key": "lens_nnsr2_pic_common",
"image_urls": [
"https://gitexx.png",
],
"model_quality": "MQ",
"aigc_meta": {
"producer_id": "1",
}
}
formatted_body = json.dumps(body_params)
signV4Request(access_key, secret_key, service,
formatted_query, formatted_body)别的服务，没有开通，也没有试过，但是就体验来说，怎么说呢，可能自然风景还行，如果是科研照片，还是不太行