Photoshop中的柵格和矢量圖形有什麼區別？

Raster和vector圖形在Photoshop中有不同用途，了解它們的區別有助於設計決策。 Raster圖形由像素組成，適合照片和復雜紋理，但縮放會模糊；Vector圖形基於數學公式，可無損縮放，適合標誌、圖標和清晰線條藝術。在Photoshop中使用形狀工具或導入EPS/PDF文件可創建Vector圖形，但一旦光柵化則失去可擴展性。使用Raster的情況包括編輯照片、應用濾鏡或創建有紋理的藝術品；使用Vector的情況包括設計需縮放的標誌、添加清晰文字或形狀。兩者可在同一文件中共存，但需要清晰邊緣或後期縮放應優先選Vector。

Raster and vector graphics serve different purposes in Photoshop, even though the program is primarily known for working with raster images. Knowing how they differ—and when to use each—can help you make better design decisions.

What Are Raster Graphics?

Raster graphics are made up of pixels—tiny squares of color arranged in a grid. When you take a photo or edit an image in Photoshop, you're working with a raster graphic.

• Zooming in too much makes the image blurry or pixelated
• Resolution-dependent (quality depends on pixel count)
• Best for detailed images like photos or complex textures

Photoshop handles raster graphics natively, which is why it's the go-to tool for photo editing, digital painting, and any project where subtle gradients and fine detail matter.

How Do Vector Graphics Work in Photoshop?

Vector graphics are based on mathematical formulas that define lines, curves, and shapes. Unlike raster images, they stay sharp at any size.

• Resolution-independent (scales without losing quality)
• Ideal for logos, icons, text, and clean line art
• Created using paths and anchor points rather than pixels

In Photoshop, you can work with vector graphics by using shape tools, the Pen tool, or placing vector-based files like EPS or PDFs. However, once you rasterize a vector layer, it becomes pixel-based and loses its scalability.

When to Use Each Type in Photoshop

Knowing when to stick with raster or use vector elements can improve your workflow:

Use raster graphics when:

• Editing photographs
• Applying filters or effects that require pixels
• Creating painterly or textured artwork

Use vector graphics when:

• Designing logos or icons that need to scale
• Adding crisp text or shapes to a layout
• You want to keep some elements editable and sharp

A common example is designing a flyer in Photoshop: you might use raster images for background photos and vector-based shapes and text for headlines and call-out boxes.

Key Differences Summary

You can mix both types in a single Photoshop file, but if you're planning to scale something later or need very clean edges, start with vectors.

基本上就這些。

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