Discovering the Hidden Flaw in Notebooklm Slides
Notebooklm is honestly a god-tier knowledge tool, especially for creating presentation slides. The quality of the generated slides is usually impressively high. But I ran into a frustrating issue: the slides are generated at a 1K resolution (1376x768), and when Chinese text appears in small font sizes, the strokes get messy and break apart. You can still read the text, but visually, it’s quite ugly and distracting.
After some trial and error, I found a practical fix to this problem that significantly improves the Chinese font clarity.
The Fix: Using Gemini to Upscale and Repair Text
The trick is to download the original 1K slide image and then upload it to Gemini with the prompt: “请将该图片用最高分辨率重新生成，修复文字错误” (Please regenerate this image at the highest resolution and fix text errors). Gemini processes the image and generates a 2K version that looks almost identical but with much sharper Chinese characters.
After the upscaling, I click the icon at the top right of the image in Gemini to download the high-definition version. The difference is incredible — the previously broken strokes become crisp and clear, and the text is now visually pleasing even when zoomed in.
You can find the full prompt here: ✨Prompt✨
Lessons and Tips for Text to Image Creators
This experience taught me a lot about handling text in AI-generated images, especially with languages that have complex characters like Chinese. The main points I took away:
- Resolution really matters for text legibility; 1K can be too low for fine details.
- Using a dedicated AI art creator like Gemini to upscale and repair images can save a lot of headaches.
- Prompt adjustments that specifically ask for fixing text errors are key to better output.
If you’re working with AI prompts for slides or documents featuring Chinese text, consider this two-step workflow: generate with Notebooklm, then upscale with Gemini. It’s a quick fix to what could otherwise be a major visual flaw.
For more on image generation and AI image generator tips, check out these resources.