哪些文件格式（PSD，PSB，TIFF，JPEG，PNG，GIF）最適合不同的情況？

選擇正確的圖像文件格式至關重要。 1. PSD和PSB適用於Photoshop編輯，保留圖層、蒙版和文本設置，PSD適合大多數項目，PSB用於超大文件；2. TIFF適用於高質量打印和存檔，支持透明度和無損壓縮，但文件較大；3. JPEG適合網頁和照片共享，採用有損壓縮以減小文件大小，不適合線條圖形；4. PNG提供透明背景和無損壓縮，適合圖標和清晰圖像，分為PNG-8和PNG-24；5. GIF用於簡單動畫和靜態圖像，顏色受限但廣泛支持，適用於社交媒體。根據用途選擇合適格式以達到最佳效果。

When you're working with different image file formats, choosing the right one for the job can make a big difference. Whether it's for web use, print, or editing flexibility, each format has its strengths. Here's a breakdown of when and why to use PSD, PSB, TIFF, JPEG, PNG, or GIF.

PSD & PSB: Best for Editing in Photoshop

If you're working on a layered design in Photoshop, PSD (Photoshop Document) is your go-to format. It preserves all your layers, masks, adjustment settings, and text so you can come back later and tweak anything without losing quality.

PSB is basically a PSD for really large files—like those over 2GB. If you're designing something huge, like a billboard or high-res game asset, PSB keeps everything intact without hitting size limits.

• Use PSD for most Photoshop projects
• Switch to PSB if your file gets too big
• Never flatten unless you have to—keep layers editable

These formats aren't meant for final delivery; they're strictly for saving your work mid-edit.

TIFF: High Quality for Print and Archiving

TIFF (Tagged Image File Format) is a lossless format that supports layers and transparency, making it ideal for high-quality print work or archiving images. It's commonly used in publishing and professional photography because it doesn't compress data like JPEG does.

• Great for detailed print jobs (eg, brochures, photo books)
• Supports layers and transparency (unlike JPEG)
• Larger file sizes than JPEG or PNG—so not great for websites

TIFF is a safe bet when you need to keep every detail intact but don't need layers for future edits (in which case you'd use PSD instead).

JPEG: Ideal for Web and Photo Sharing

JPEG (Joint Photographic Experts Group) is by far the most common image format online. It uses lossy compression, meaning some image data is discarded to reduce file size. That makes it perfect for photos where slight quality loss isn't noticeable.

• Most widely supported format for websites and email
• Good balance between quality and file size
• Not good for line art, text, or graphics with sharp edges

You'll often see JPEG used for social media, blogs, and digital cameras. Just remember: every time you save a JPEG, it loses a little more quality.

PNG: Transparency and Lossless Compression

PNG (Portable Network Graphics) is your best friend when you need transparency or lossless compression. It's especially useful for logos, icons, screenshots, and web graphics.

• Perfect for images with transparent backgrounds
• Keeps full detail without compression artifacts
• Larger file size than JPEG—so not always ideal for full-color photos

There are two main types:

• PNG-8 : smaller file size, limited colors (good for simple graphics)
• PNG-24 : full color range, larger size (better for detailed images)

Use PNG when clarity matters more than file size, like for UI elements or illustrations.

GIF: Animated Images and Simple Graphics

GIF (Graphics Interchange Format) is mostly known for short animations, but it can also be used for basic static images. It supports only 256 colors, so it's not suitable for photos—but works well for small, simple graphics or animated memes.

• Use GIF for short looping animations (no sound)
• Avoid for photos due to limited color palette
• Still popular on social platforms and messaging apps

Keep in mind that newer formats like APNG or WebP offer better quality and features, but GIF remains widely supported.

So yeah, there's no one-size-fits-all image format. Depending on whether you're editing, printing, or putting something online, you'll want to pick the one that fits best.基本上就這些。

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