[Example] Image Search with Vision API (#447)

* backend

* frontend

* fix settings

* Update README.md

* Update README.md

* refactor: remove cli entry

* refactor: remove cli entry

* refactor: pass image bytes

* merge func

* refactor: remove redundant check

Author: par4m

examples/image_search_example/.env

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+COCOINDEX_DATABASE_URL="postgresql://cocoindex:[email protected]:5432/cocoindex"

examples/image_search_example/README.md

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+# Image Search with CocoIndex
+
+![image](https://github.com/user-attachments/assets/3a696344-c9b4-46e8-9413-6229dbb8672a)
+
+- QDrant for Vector Storage
+- Ollama Gemma3 (Image to Text)
+- CLIP ViT-L/14 - Embeddings Model
+
+## Make sure Postgres and Qdrant are running
+```
+docker run -d --name qdrant -p 6334:6334 qdrant/qdrant:latest
+export COCOINDEX_DATABASE_URL="postgres://cocoindex:cocoindex@localhost/cocoindex"
+```
+
+## Create QDrant Collection
+```
+curl -X PUT
+  'http://localhost:6333/collections/image_search' \
+  --header 'Content-Type: application/json' \
+  --data-raw '{
+    "vectors": {
+      "embedding": {
+        "size": 768,
+        "distance": "Cosine"
+      }
+    }
+  }'
+
+```
+
+## Run Ollama
+```
+ollama pull gemma3
+ollama serve
+```
+
+## Create virtual environment and install dependencies
+```
+python -m venv .venv
+source .venv/bin/activate
+pip install -r requirements.txt
+```
+
+### Place your images in the `img` directory.
+
+
+## Run Backend
+```
+python main.py cocoindex setup
+python main.py cocoindex update
+uvicorn main:app --reload --host 0.0.0.0 --port 8000
+```
+
+## Run Frontend
+```
+cd frontend
+npm install
+npm run dev
+```
+
+Go to `http://localhost:5174` to search.

examples/image_search_example/frontend/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# vitepress build output
+**/.vitepress/dist
+
+# vitepress cache directory
+**/.vitepress/cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*

examples/image_search_example/frontend/index.html

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+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Image Search</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.jsx"></script>
+  </body>
+</html>