How to Use Theme Tagging Service of Image Kit ?

What is Image Kit ?

Image Kit incorporates smart image editing and design as well as animation capabilities into your app, giving it the power of efficient image content reproduction while providing a better image editing experience for your users.

What is Theme Tagging Service ?

Theme tagging service is a part of Image Kit’s Image Vision SDK. Theme tagging service can be used for detecting objects in images or tagging images for classifying them.

In this article, we are going to talk about how to use the Theme tagging service of Image Vision SDK.

Before the development process, you have to integrate the HMS Core.

Android | Integrating Your Apps With Huawei HMS Core

To get started on Image Kit follow Integration of Image Kit.

Integration of Image Kit

Let’s start

Firstly import the image vision packages.

Theme Tagging Service of Image Kit

Now we have to obtain an ImageVision instance for the theme tagging service.

Obtaining ImageVision instance

Now it’s time to initialize the service.

Note: If you are using other services in Image Kit you can use the same method for initializing the service.

Which Is why I created a Utility.class and returned imageVisionAPI.

In Main Activity

initService

In Utility class :

initService

If the initialization is successful onSuccess method is called. And successCode will be 0.

If the framework initialization fails, the onFailure method is called and an error code is returned.

Now you can ask what is authJson?

Description of authJson parameters

You can find Parameters authJson in your agconnect-services.json except for token.

If you didn’t integrate Account kit into your application you can see how to obtain token from here.

How to Obtain Token

But there is a second approach if you integrated Account Kit into your project.

For detailed information about integration of Account Kit you can check this article:

Huawei Account Kit Basics Tutorial: How to integrate into your Android app easily?

First, you have to login to your Huawei account:

Login with Huawei ID

When you successfully login get Token in onActivityResult:

onActivityResult

Here is the getToken method from the Utility class:

getToken method for getting access token from huaweiAccount

Congratulations you have successfully obtained the access_token for authJson.

Now we have to construct parameters.

imageBitmap is the image we want to tag.

requestJson parameters :

requestJson

Example requestJson :

taskJson parameters :

taskJson

The important part of taskJson is needObjectList.

When it’s true service will provide us with list of objects in the image with objectlist as JSONArray.

Description of result parameters :

Description of response parameters :

Description of tags parameters :

Now first let's obtain the theme tagging result:

apply Tag to image

Congrats now we are able to get the tags of the images.

But there is one more thing Theme Tagging Service can provide us.

And it’s the Object List of the images.

objectlist

Box parameters of objectlist :

With these box parameters from objectlist we can draw lines around the objects that theme tagging services detected.

To get objectlist we have to add the code below into the applyTag() method.

Here we are also adding borders of detected objects to a list.

Then we are using that list to draw on the image.

To Get the borders of the image we can use the method below

getRectangle from object

Finally, let’s draw the lines on the image.

Here is the result :)

When you no longer need theme tagging service call the imageVisionAPI.stop() to stop the service.

References:

Image Kit