Help Center/ Data Security Center/ API Reference/ API Description/ Image Watermarking/ Extracting Invisible Watermarks from Images
Updated on 2024-07-29 GMT+08:00

Extracting Invisible Watermarks from Images

Function

This API is used to extract invisible image watermarks from images. You need to pass a watermarked image in formData format to this API. DSC returns the binary stream of the extracted invisible watermark. Currently, the supported image formats include .jpg, .jpeg, .jpe, .png, .bmp, .dib, .rle, .tiff, .tif, .ppm, .webp, .tga, .tpic, and .gif.

Calling Method

For details, see Calling APIs.

URI

POST /v1/{project_id}/image/watermark/extract-image

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID.

Request Parameters

Table 2 Request header parameters

Parameter

Mandatory

Type

Description

X-Auth-Token

Yes

String

User token. It can be obtained by calling the IAM API used to obtain a user token. The value of X-Subject-Token in the response header is a token.

Table 3 FormData parameters

Parameter

Mandatory

Type

Description

file

Yes

File

Image file from which invisible watermarks are to be extracted.

Response Parameters

Status code: 400

Table 4 Response body parameters

Parameter

Type

Description

error_code

String

Error Code

error_msg

String

Error Message

Example Requests

Extract the invisible watermark from image "test.PNG".

The request is submitted through a form. In the request, "file" indicates a specific file.

POST /v1/{project_id}/image/watermark/extract-image HTTP/1.1

{
  "file" : "test.PNG"
}

Example Responses

Status code: 200

Request succeeded.

"{\"image\"}"

Status code: 400

Invalid request.

{
  "error_code" : "DSC.00000007 ",
  "error_msg" : "File format error"
}

SDK Sample Code

The SDK sample code is as follows.

Extract the invisible watermark from image "test.PNG".

The request is submitted through a form. In the request, "file" indicates a specific file.

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package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.dsc.v1.region.DscRegion;
import com.huaweicloud.sdk.dsc.v1.*;
import com.huaweicloud.sdk.dsc.v1.model.*;


public class ShowImageWatermarkWithImageSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");

        ICredential auth = new BasicCredentials()
                .withAk(ak)
                .withSk(sk);

        DscClient client = DscClient.newBuilder()
                .withCredential(auth)
                .withRegion(DscRegion.valueOf("<YOUR REGION>"))
                .build();
        ShowImageWatermarkWithImageRequest request = new ShowImageWatermarkWithImageRequest();
        ShowImageWatermarkWithImageRequestBody bodybody = new ShowImageWatermarkWithImageRequestBody();
        bodybody.withFile("test.PNG");
        body.withBody(bodybody);
        request.withBody(listbodyBody);
        try {
            ShowImageWatermarkWithImageResponse response = client.showImageWatermarkWithImage(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}

Extract the invisible watermark from image "test.PNG".

The request is submitted through a form. In the request, "file" indicates a specific file.

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# coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkdsc.v1.region.dsc_region import DscRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkdsc.v1 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.environ["CLOUD_SDK_AK"]
    sk = os.environ["CLOUD_SDK_SK"]

    credentials = BasicCredentials(ak, sk)

    client = DscClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(DscRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = ShowImageWatermarkWithImageRequest()
        bodybody = ShowImageWatermarkWithImageRequestBody(
            file="test.PNG"
        )
        request.body = listBodybody
        response = client.show_image_watermark_with_image(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

Extract the invisible watermark from image "test.PNG".

The request is submitted through a form. In the request, "file" indicates a specific file.

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package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    dsc "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dsc/v1"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dsc/v1/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/dsc/v1/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        Build()

    client := dsc.NewDscClient(
        dsc.DscClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.ShowImageWatermarkWithImageRequest{}
	bodybody := &model.ShowImageWatermarkWithImageRequestBody{
		File: "test.PNG",
	}
	request.Body = listBodybody
	response, err := client.ShowImageWatermarkWithImage(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.

Status Codes

Status Code

Description

200

Request succeeded.

400

Invalid request.

Error Codes

See Error Codes.