Bridging Visions and Words with LLava

Llava 34B

Posted by Xavier Bouclet on April 02, 2024 · 7 mins read

Bridging Visions and Words with LLava

1. Purpose of this blog post

If you saw my last blog posts about Install Ollama and how to install Specific Models on Ollama you should be able to address a lot of use cases. But in this post, we will see how to work with the Ollama and Llava.

Llava is a LLM that can recognise images provided to it and generate a textual description of the image.

2. Install Llava on Ollama

To add Llava to Ollama you ne to install the Llava through the command line.

ollama pull llava:34b

I use the 34B version of Llava in this example to have better results. You could just remove the version but the version would be the 7B and the results would be less accurate. The B corresponds to the size of the model, the bigger the model the better the results but the slower is the model.

3. Use Llava with Ollama

Let’s try it with the following image :


Now let’s ask Llava 34B to describe the image :

ollama run llava:34B "tell me what do you see in this picture? ./landscape.jpg"

I execute the command from the folder where the image is located.

And this is the answer I got :

The image depicts a serene sunset scene. The sky is painted with hues of orange, pink,
and purple as the sun sets or rises on the horizon. Reflections from the light play
across the calm surface of what appears to be a lake or sea. In the foreground, there's
a beautiful display of wildflowers with vibrant colors that match the sunset tones.
These flowers, possibly lupines given their shape and coloration, add a natural beauty
to the scene. The tranquility of the water and the peacefulness of the flowers create a
harmonious and picturesque setting.

Pretty nice, isn’t it?

Let’s see how we could find a use case more useful in our daily life.

4. Handwritten Text Recognition

I wrote a note on a piece of paper :

Handwritten Text
ollama run llava:34B "Determine the hand written text in this image? ./note.jpg"

And this is the answer I got :

The handwritten text in the image reads "Hello Generative AI Meetup."

Really cool result, isn’t it?

Let’s try to improve the prompting to get just what’s written on the note :

ollama run llava:34B "Determine the hand written text in this image and just write this hand written text as the output nothing else  ./note.jpg"

Let’s see the result :

"Hello Generative AI Meetup."

Way better! But we need to have that through an API to use it in an applications.

5. Use Llava with the Ollama API

The Ollama server comes with an API that you can use to interact with the server.

We need to use the url http://localhost:11434/api/generate to interact with the generate endpoint.

    "model": "llava:34B",
    "prompt": "Determine the hand written text in this image and just write this hand written text as the output nothing else",
    "stream": false,
    "images": ["content of the file in Base 64"]}

We need to convert the image in Base64 to sent it to the server using json.

For this conversion I used Base64 Guru and copy paste the result in the json.

And this is the result I got :

    "model": "llava:34B",
    "created_at": "2024-04-03T01:38:43.681199Z",
    "response": "Hello Generative AI Meetup",
    "done": true,
    "context": [
    "total_duration": 16199642125,
    "load_duration": 23168000,
    "prompt_eval_duration": 14991832000,
    "eval_count": 7,
    "eval_duration": 1075909000

Next time we will see how to use Spring AI to have a nicer way for this use case.

6. Conclusion

Llava is a pretty cool LLM that can be used to describe images and recognise handwritten text.

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