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AI Image Generation

Tạo hình ảnh với DALL-E, Midjourney - từ cơ bản đến nâng cao

🎨 AI Image Generation

Tạo images đẹp không cần design skills với AI tools.

Các Tools Phổ Biến

ToolBest ForAccessCost
🎨 DALL-E 3Versatile, textChatGPT Plus$20/mo
🖼️ MidjourneyArtistic, stylizedDiscord$10/mo
🔧 Stable DiffusionFree, customizableLocal/webFree
✨ Canva AIQuick designsCanvaFreemium
🔥 Adobe FireflyCommercial safeAdobe$5/mo

DALL-E 3 Basics

🔐 Access

  1. ChatGPT Plus subscription
  2. Chat.openai.com
  3. Ask to create images

📝 Basic Prompt Structure

[Subject] + [Style] + [Setting] + [Details]

Example:

"A Vietnamese coffee shop, watercolor painting style, cozy morning atmosphere, warm lighting, detailed interior with wooden furniture"

💡 Prompt Examples

Product Photography

"Professional product photo of a skincare bottle, white background, soft studio lighting, clean minimalist style, high-end luxury feel"

Social Media Graphics

"Instagram post background, gradient purple to pink, abstract geometric shapes, modern minimal, space for text in center"

Blog Headers

"Wide banner image for blog about productivity, isometric illustration style, person at desk with laptop, plants and coffee, pastel colors, clean"

Midjourney Basics

🔐 Access

  1. Join Discord: discord.gg/midjourney
  2. Subscribe ($10/mo basic)
  3. Use /imagine command

📝 Prompt Format

Cú pháp

/imagine [description] --[parameters]

Common parameters:

  • --ar 16:9 (aspect ratio)
  • --v 6 (version)
  • --style raw (less stylized)
  • --q 2 (quality)

🎨 Style Keywords

Art Styles:

  • photorealistic
  • watercolor
  • oil painting
  • digital art
  • anime
  • 3D render
  • vector illustration

Photography Styles:

  • portrait photography
  • product photography
  • street photography
  • macro shot
  • aerial view

Moods:

  • dramatic lighting
  • soft and dreamy
  • vibrant and colorful
  • moody and dark
  • minimal and clean

Prompt Engineering Tips

✅ Be Specific

So sánh

❌ "A cat"

✅ "A fluffy orange tabby cat sitting on a windowsill, soft afternoon sunlight, cozy home interior, photorealistic, shallow depth of field"

🎭 Use References

  • "In the style of Studio Ghibli"
  • "Pixar animation style"
  • "Magazine editorial photography"
  • "Flat design illustration"

🚫 Negative Prompts (Midjourney)

/imagine beautiful landscape --no people, buildings, text

Use Cases

1. 📱 Social Media Content

Prompt mẫu

"Instagram carousel slide, clean white background, '5 Tips' text placeholder area, modern minimalist, brand colors: blue and white"

2. 📺 Blog Thumbnails

Prompt mẫu

"YouTube thumbnail style, excited person pointing at laptop, bright colors, bold, text space on right side, tech/business topic"

3. 📱 Product Mockups

Prompt mẫu

"iPhone mockup displaying app interface, floating in air with soft shadow, gradient background purple to blue, professional product shot"

4. 📊 Presentation Graphics

Prompt mẫu

"Business presentation slide background, abstract flowing lines, corporate blue color scheme, professional and modern, subtle and not distracting"

Consistency Tips

Brand Consistency
  1. 💾 Save good prompts - Reuse với tweaks nhỏ
  2. 🎨 Define style keywords - "minimalist, pastel, clean"
  3. 📐 Use same aspect ratios - 1:1, 16:9, etc.
  4. 🎨 Consistent color palette - Mention specific colors
  5. 🔄 Create series - Same style, different subjects

📋 Prompt Template

Template

"[Subject/scene] Style: [art style] Colors: [color palette] Mood: [atmosphere] Technical: [camera/lighting] Format: [aspect ratio, use case]"

Limitations

Know the Limits
  • 🔤 Text: AI struggles với text in images
  • ✋ Hands/fingers: Often wrong number
  • 👤 Specific faces: Can't recreate real people
  • 🎬 Complex scenes: May miss details
  • 🔄 Consistency: Hard to get exact same character

Solutions:

  • Edit text trong Canva after
  • Regenerate nhiều lần
  • Use image editing tools for fixes

Legal & Ethics

✅ Can Use For:

  • Personal projects
  • Social media (most platforms)
  • Blog/website graphics
  • Internal business use

⚠️ Check Terms For:

  • Commercial products
  • Client work
  • Merchandise
  • Stock photo sales

💡 Best Practice:

  • Keep prompts for proof
  • Disclose AI use if required
  • Don't claim as "photography"

Bài Tập

Practice
  1. 🎨 Tạo 3 images với DALL-E cho social media
  2. 🎭 Experiment với different styles
  3. 🔄 Create consistent series (3 images, same style)
  4. 💾 Save your best prompts

Tiếp theo: Bài 5 - Canva AI Features