{"id":4137,"date":"2023-11-04T23:14:05","date_gmt":"2023-11-04T23:14:05","guid":{"rendered":"http:\/\/localhost:10003\/how-to-create-a-image-search-engine-with-openai-clip-and-python\/"},"modified":"2023-11-05T05:47:59","modified_gmt":"2023-11-05T05:47:59","slug":"how-to-create-a-image-search-engine-with-openai-clip-and-python","status":"publish","type":"post","link":"http:\/\/localhost:10003\/how-to-create-a-image-search-engine-with-openai-clip-and-python\/","title":{"rendered":"How to Create a Image Search Engine with OpenAI CLIP and Python"},"content":{"rendered":"
In today’s digital world, image search engines play a crucial role in various applications like e-commerce, content management systems, and social media platforms. Traditional methods for image search rely on text-based metadata or manually annotated tags, which can be time-consuming and error-prone.<\/p>\n
But thanks to recent advancements in deep learning, we now have powerful models that can understand both images and text simultaneously. One such model is OpenAI’s CLIP (Contrastive Language-Image Pretraining), which can be used to create an image search engine with remarkable accuracy.<\/p>\n
In this tutorial, we will walk through the process of building an image search engine using OpenAI CLIP and Python. By the end of this tutorial, you will have a clear understanding of how to leverage CLIP’s capabilities to build your own image search engine.<\/p>\n
To follow along with this tutorial, you will need the following:<\/p>\n
Let’s get started!<\/p>\n
First, let’s set up the Python environment by creating a virtual environment and installing the necessary packages.<\/p>\n
mkdir image_search_engine\ncd image_search_engine\n<\/code><\/pre>\n<\/li>\n- Set up a virtual environment:\n
python3 -m venv env\nsource env\/bin\/activate\n<\/code><\/pre>\n<\/li>\n- Install the required packages:\n
pip install torch torchvision ftfy regex requests tqdm Pillow\n<\/code><\/pre>\nIf you have a GPU-enabled machine, you can install torch<\/code> with GPU support by following the instructions on the official pytorch website: https:\/\/pytorch.org\/get-started\/locally\/<\/p>\n<\/li>\n<\/ol>\nGreat! Now our environment is all set up to build our image search engine.<\/p>\n
Step 2: Collect Image Data<\/h2>\n
To create an image search engine, we need a dataset of images. In this tutorial, we will use the CIFAR-10 dataset as a sample dataset for demonstration purposes. CIFAR-10 consists of 60,000 32×32 color images in 10 classes.<\/p>\n
\n- Download the CIFAR-10 dataset:\n
mkdir data\ncd data\nwget https:\/\/www.cs.toronto.edu\/~kriz\/cifar-10-python.tar.gz\ntar -xf cifar-10-python.tar.gz\n<\/code><\/pre>\n<\/li>\n- Now we need to preprocess the images into a format suitable for CLIP:\n
from PIL import Image\nimport numpy as np\nimport pickle\n\ndef preprocess_image(image):\n image = np.array(image)\n image = image.astype('float32') \/ 255.0\n image = (image - 0.5) \/ 0.5 # normalize between -1 and +1\n return image\n\ndef preprocess_cifar10(data_path, save_path):\n with open(data_path, 'rb') as file:\n data = pickle.load(file, encoding='bytes')\n\n images = np.array(data[b'data'])\n labels = np.array(data[b'labels'])\n\n num_images = len(images)\n preprocessed_images = []\n\n for i in range(num_images):\n image = images[i].reshape(3, 32, 32)\n image = np.transpose(image, (1, 2, 0))\n image = preprocess_image(image)\n preprocessed_images.append(image)\n\n with open(save_path, 'wb') as file:\n pickle.dump((preprocessed_images, labels), file)\n\npreprocess_cifar10('cifar-10-batches-py\/data_batch_1', 'cifar10_preprocessed.pkl')\n<\/code><\/pre>\nThis will preprocess the CIFAR-10 dataset and save it as a pickled file named cifar10_preprocessed.pkl<\/code>.<\/p>\n<\/li>\n<\/ol>\nExcellent! We now have our preprocessed dataset ready, and we can move on to the next step.<\/p>\n
Step 3: Prepare CLIP Model<\/h2>\n
Next, we need to download the pre-trained CLIP model released by OpenAI and load it into our Python environment.<\/p>\n
\n- Download the CLIP model:\n
mkdir models\ncd models\nwget https:\/\/openai.clip.models.s3-us-west-2.amazonaws.com\/vqgan\/vqgan_imagenet_f16_16384.yaml\nwget https:\/\/openai.clip.models.s3-us-west-2.amazonaws.com\/vqgan\/vqgan_imagenet_f16_16384.ckpt\n<\/code><\/pre>\n<\/li>\n- Install the necessary libraries to load the CLIP model:\n
pip install git+https:\/\/github.com\/openai\/CLIP.git\n<\/code><\/pre>\nNote: It may take a while to install the dependencies and download the necessary files.<\/p>\n<\/li>\n
- \n
Load the CLIP model in Python:<\/p>\n
import torch\nimport clip\n\ndevice = \"cuda\" if torch.cuda.is_available() else \"cpu\"\nclip_model, preprocess = clip.load(\"openai\/clip-vit-base-patch32\", device=device)\n<\/code><\/pre>\nThis will download the necessary files and load the CLIP model into memory.<\/p>\n<\/li>\n<\/ol>\n
Brilliant! We have successfully set up the CLIP model. Now onto the exciting part – searching for images!<\/p>\n
Step 4: Search for Images<\/h2>\n
Now that we have our preprocessed dataset and CLIP model ready, let’s build the image search engine. We’ll write a Python function that takes an input image and returns similar images from the dataset. The similarity is determined based on the text prompts provided to CLIP.<\/p>\n
Here’s how our function will work:<\/p>\n
\n- Convert the input image into a feature vector using the CLIP model.<\/li>\n
- Compute the cosine similarity between the input image feature vector and the feature vectors of all dataset images.<\/li>\n
- Return the top k most similar images based on cosine similarity.<\/li>\n<\/ol>\n
Let’s write the code for our image search function:<\/p>\n
def search_images(input_image, dataset_images, k=5):\n # Preprocess input image\n input_tensor = preprocess(input_image).unsqueeze(0).to(device)\n\n # Compute feature vector for the input image\n with torch.no_grad():\n input_features = clip_model.encode_image(input_tensor).float()\n\n # Compute cosine similarity between input image and dataset images\n similarities = (input_features @ dataset_images.T).squeeze(0)\n\n # Get indices of top k most similar images\n top_indices = similarities.argsort(descending=True)[:k]\n\n # Return top k most similar images\n return [dataset_images[i] for i in top_indices]\n<\/code><\/pre>\nLet’s test our search function on a sample image from the CIFAR-10 dataset:<\/p>\n
import matplotlib.pyplot as plt\n\nwith open('data\/cifar10_preprocessed.pkl', 'rb') as file:\n dataset_images, labels = pickle.load(file)\n\nindex = 42 # Choose a random index\nsample_image = dataset_images[index]\n\nsimilar_images = search_images(sample_image, dataset_images, k=5)\n\n# Display the input image\nplt.subplot(1, 6, 1)\nplt.imshow(sample_image)\nplt.title(\"Input Image\")\nplt.axis(\"off\")\n\n# Display the top 5 similar images\nfor i, image in enumerate(similar_images):\n plt.subplot(1, 6, i + 2)\n plt.imshow(image)\n plt.title(f\"Similar Image {i+1}\")\n plt.axis(\"off\")\n\nplt.show()\n<\/code><\/pre>\nThis code will display the input image and the top 5 similar images based on the CLIP model’s understanding of the images. You can modify the index<\/code> and k<\/code> values to explore the results for different images.<\/p>\nCongratulations! You have successfully built your own image search engine using OpenAI CLIP. You can now experiment with different images and see how CLIP performs.<\/p>\n
Conclusion<\/h2>\n
In this tutorial, you learned how to create an image search engine using OpenAI CLIP and Python. We walked through the process of setting up the environment, pre-processing image data, loading the CLIP model, and using it to search for similar images. With CLIP’s remarkable capability to understand both images and text, you can build powerful image search engines that can revolutionize various applications.<\/p>\n
Feel free to explore further by experimenting with other datasets, fine-tuning CLIP with custom images, or integrating the search engine into your existing projects. The possibilities are endless!<\/p>\n
Now it’s time for you to unleash the power of CLIP and build your own image search engine. Happy coding!<\/p>\n","protected":false},"excerpt":{"rendered":"
How to Create an Image Search Engine with OpenAI CLIP and Python In today’s digital world, image search engines play a crucial role in various applications like e-commerce, content management systems, and social media platforms. Traditional methods for image search rely on text-based metadata or manually annotated tags, which can Continue Reading<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[39,41,75,1437,767],"yoast_head":"\nHow to Create a Image Search Engine with OpenAI CLIP and Python - Pantherax Blogs<\/title>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\t\n\t\n\t\n