{"slug":"edge-separation-technique","title":"照片缺少层次感？摄影后期边缘分离技术了解一下！","author":"Thomas看看世界","date":"2021-03-28","wechat":"https://mp.weixin.qq.com/s?__biz=MzI4NDA5MzE5NQ==&mid=2247492914&idx=1&sn=9d27e62a5d267f5ab5297dcbec2ecbac&chksm=eb821b56dcf5924068fba2c78882dce1eb16872a902eca1029016a31fce09609ed98b3c0cb83&scene=21#wechat_redirect","blocks":[{"t":"h","x":"Thomas看看世界","xe":"Thomas Chu Photo"},{"t":"p","x":"照片中物体边缘的不清晰，会让照片细节丢失，层次感变差。","b":false,"xe":"Unclear edges between objects in a photo cost it detail and depth."},{"t":"p","x":"今天的摄影后期教程中，我会和大家讲解边缘分离技术，利用PS选区和加深减淡工具，快速强化照片层次感。","b":false,"xe":"In today's post-processing tutorial, I'll explain the edge separation technique — using PS selections plus Dodge and Burn to quickly strengthen a photo's sense of depth."},{"t":"img","f":"img-02","w":1080,"h":720},{"t":"h","x":"视频教程","xe":"Video Tutorial"},{"t":"bili","bv":"BV1iV411e7P7","bpic":"bili-1","bt":"照片缺少层次感？摄影后期边缘分离技术了解一下！"},{"t":"p","x":"这一篇是上面视频的完整图文整理。这期教程里，Thomas 拆解了那张云海山岳照片层次感的最重要来源——边缘分离技术：只用 PS 的选区加加深、减淡工具，把山体与山体之间模糊柔化的边缘重新做得清晰分明。适合先在这里把流程和参数看明白，再到视频里听细节。","xe":"This is the fully illustrated companion to the video above. In this tutorial, Thomas breaks down the single most important source of depth in his sea-of-clouds mountain photo — the edge separation technique: using nothing but Photoshop selections plus the Burn and Dodge tools to re-establish crisp, well-defined edges between mountains. Read it here for the workflow and settings, then dive into the video for the details.","b":false},{"t":"p","x":"先看效果。下面这张截自视频 0:47 处，图层面板里选中的就是边缘分离所在的图层——处理前后对比，「之前」边缘粘连、「之后」边缘分开、层次立刻分明。整期教程就是这一步操作的完整拆解，下文逐步展开。","xe":"Start with the result: this frame is captured at 0:47 in the video, with the edge-separation layer highlighted in the Layers panel. Toggle before and after, and the merged edges pull apart — the layers of the scene instantly read as distinct. The whole tutorial unpacks this one move, step by step, below.","b":false},{"t":"img","f":"v01","w":768,"h":480},{"t":"h","x":"01 什么是层次感：分层与清晰边缘","xe":"01 What Makes Depth: Layers Plus Crisp Edges"},{"t":"p","x":"层次感，说白了就是让画面分出很多层：前后的明暗和色彩各自变化，让读者一眼能分清哪层在前、哪层在后。但光分层还不够，还有一个必要条件——边缘要清晰。物体之间的轮廓线足够分明，层与层才真正「立」得起来（视频 0:56 处）。","xe":"Depth, in plain terms, means splitting the frame into many layers: foreground and background each shift in brightness and color so the eye can instantly tell which layer sits in front. But separation alone is not enough — there is one more requirement: the edges must be crisp. Only when the contour lines between objects are well defined do the layers truly stand apart (at 0:56 in the video).","b":false},{"t":"p","x":"麻烦在于，风光照片里的很多边缘天生是柔的。比如视频 1:11 处展示的这条山体与云雾的边界——前期确实拍到了，但它非常模糊、非常柔。无论用强化对比度，还是各类插件里的局部对比度增强，都很难处理这种边缘，这正是边缘分离技术的用武之地。","xe":"The trouble is that many edges in landscape photos are naturally soft. Take the boundary between the ridge and the mist shown at 1:11 in the video — the camera did record it, but it is extremely mushy. Global contrast boosts and even local-contrast plugins struggle with edges like this, and that is exactly where edge separation comes in.","b":false},{"t":"img","f":"v02","w":768,"h":480},{"t":"h","x":"02 准备工作：盖印图层与羽化选区","xe":"02 Setup: Stamped Layer and a Feathered Selection"},{"t":"p","x":"整项技术只用两样工具：选区，和加深减淡。第一步，按 Ctrl+Alt+Shift+E 把下面所有图层盖印成一个新图层（视频 1:37 处），所有边缘分离都在这个盖印图层上做，下面的原始图层不受破坏。","xe":"The whole technique needs only two tools: selections, and Dodge & Burn. Step one — press Ctrl+Alt+Shift+E to stamp everything below into a single merged layer (at 1:37 in the video). All edge separation happens on this stamped layer, leaving the original layers untouched.","b":false},{"t":"img","f":"v03","w":768,"h":480},{"t":"p","x":"选区工具的使用有个关键建议：把羽化设为 1-2 个像素（视频 1:53 处）。不羽化的话选区边缘太硬，加深完一取消选择，就会露出生硬的边。设好羽化后，用套索沿着山脊把要强化的山体勾出来（视频 2:21 处）；勾的过程中按住 Shift 可以扩展选区，按住 Alt 可以削减选区（视频 2:34 处）。","xe":"One key tip for the selection tools: set the feather to 1-2 pixels (at 1:53 in the video). Without feathering the selection edge is razor-hard — the moment you finish burning and deselect, a stiff artificial border shows up. With feather set, trace the mountain you want to enhance with the Lasso along the ridge (at 2:21 in the video); hold Shift to add to the selection and Alt to subtract from it (at 2:34 in the video).","b":false},{"t":"img","f":"v04","w":768,"h":480},{"t":"h","x":"03 加深减淡：暗部更暗、亮部更亮","xe":"03 Dodge and Burn: Darken the Dark, Brighten the Bright"},{"t":"p","x":"边缘分离的原理很朴素：山体下侧偏暗、上侧偏亮，那就用加深工具把暗的地方做得更暗，再用减淡工具把亮的地方提得更亮，一压一提，边缘就被「推开」了。加深工具的范围选择「中间调」，曝光度不用很高、10% 以下，沿着选区慢慢涂抹（视频 3:01 处）。","xe":"The principle is simple: the lower side of a mountain is darker, the upper side brighter — so push the dark side darker with the Burn tool and lift the bright side with Dodge, and the edge gets pried open. Set the Burn tool's range to Midtones, keep the exposure low — under 10% — and paint slowly along the selection (at 3:01 in the video).","b":false},{"t":"img","f":"v05","w":768,"h":480},{"t":"p","x":"把山体下侧加深后，选区不要取消：右键选择「选择反向」，再用减淡工具把上半部分提亮，一次完整的边缘分离就做完了（视频 3:38 处）。视频里这步演示的幅度偏大，实际操作时把图层不透明度降低，调到一个合理的幅度即可（视频 4:02 处）。","xe":"After burning the lower side, keep the selection: right-click and choose Select Inverse, then lift the upper half with the Dodge tool — and one full edge separation is done (at 3:38 in the video). The demonstration applies a deliberately heavy hand; in practice, lower the layer opacity until the effect sits at a believable level (at 4:02 in the video).","b":false},{"t":"p","x":"还有一个细节：为了不改变画面颜色，把这层的混合模式改成「明度」（视频 4:08 处）。这样加深减淡只作用于亮度，下面图层的色彩完全不受影响——边缘分离强化的是结构，不该顺带动色调。","xe":"One more detail: to keep colors unchanged, switch this layer's blend mode to Luminosity (at 4:08 in the video). Burning and dodging then act on brightness only, and the color of the layers below stays exactly as it was — edge separation is about structure, and it should never drag the palette along.","b":false},{"t":"img","f":"v06","w":768,"h":480},{"t":"h","x":"04 明显边缘：快速选择工具更快","xe":"04 Obvious Edges: Quick Selection Is Faster"},{"t":"p","x":"不是所有边缘都要用套索手勾。像视频中这条已经比较明显的山体分界线，直接用快速选择工具沿着边缘刷几下就能选出（视频 4:32 处），然后右键「羽化」，同样羽化 1 个像素（视频 4:38 处）。","xe":"Not every edge needs a hand-drawn Lasso path. For a boundary this well defined — like the ridgeline in the video — the Quick Selection tool brushes along it and grabs it in a few strokes (at 4:32 in the video); then right-click and Feather, again by just 1 pixel (at 4:38 in the video).","b":false},{"t":"img","f":"v07","w":768,"h":480},{"t":"img","f":"v08","w":768,"h":480},{"t":"p","x":"套路相同：先用加深工具处理下侧，范围中间调，幅度比上一座山更小一点，效果更自然；再反向选区，用减淡工具提亮外侧——范围中间调、曝光度 6% 左右，提亮得要自然（视频 5:11 处）。Ctrl+D 取消选区，这条边缘的分离感就明显强化了。","xe":"The routine is the same: Burn the lower side first — Midtones range, this time with an even lighter touch than the previous peak for a more natural result; then invert the selection and Dodge the outer side — Midtones again, exposure around 6%, keeping the lift gentle (at 5:11 in the video). Press Ctrl+D to deselect, and the edge reads noticeably more separated.","b":false},{"t":"img","f":"v09","w":768,"h":480},{"t":"h","x":"05 同一座山的两种明暗关系要分开处理","xe":"05 One Mountain, Two Brightness Relations"},{"t":"p","x":"边缘分离不是流水线作业。视频里的主山体就是个典型：它的左上部分比背景暗，右下部分却比背景亮（视频 5:45 处）——同一条边的两种明暗关系完全相反，如果一刷到底，必然一半强化、一半抵消，所以要分段勾选、分开处理。","xe":"Edge separation is not an assembly line. The main peak in the video is a textbook case: its upper-left face is darker than the background, while its lower-right face is brighter (at 5:45 in the video). The brightness relations along one edge run in opposite directions — apply one treatment and you strengthen half the edge while canceling the other, so select and process it in segments.","b":false},{"t":"img","f":"v10","w":768,"h":480},{"t":"p","x":"分开处理的思路：对偏暗的部分，用加深工具把靠背景的一侧再压暗一点，让它和背景的亮度差进一步拉开（视频 6:07 处）；对偏亮的部分，则用减淡工具强化它的高光区（视频 6:15 处）。每做完一处，把图缩小看整体——山体是否和背景分离得更好了。","xe":"The thinking, segment by segment: where the mountain is darker than the background, use the Burn tool to sink the side facing the background a little further, widening the brightness gap (at 6:07 in the video); where it is brighter, use Dodge to strengthen its highlight zone (at 6:15 in the video). After each pass, zoom out and judge the whole — has the mountain separated from the background any better?","b":false},{"t":"img","f":"v11","w":768,"h":480},{"t":"img","f":"v12","w":768,"h":480},{"t":"p","x":"视频里演示的幅度有点大，Thomas 特意提醒：实际操作一定要控制一个合理的幅度（视频 6:31 处）。边缘分离是精细活，稍一过火就会显得假，「刚刚好但看不出来修过」才是理想状态。","xe":"The on-video strokes run deliberately heavy, and Thomas flags it himself: in real work you must keep the amplitude reasonable (at 6:31 in the video). Edge separation is fine surgery — push it a notch too far and it reads fake; the ideal is an edge that separates beautifully yet shows no trace of editing.","b":false},{"t":"h","x":"06 全图重复，再交给曲线与降噪收尾","xe":"06 Repeat Across the Frame, Then Finish"},{"t":"p","x":"最终成片的层次感，就是对画面里每一处重要边缘都做一遍这种「一边减淡、一边加深」的处理换来的（视频 6:39 处）。它确实需要花时间，但这正是层次感从「差不多」到「很强」的那段距离。","xe":"The depth of the final image is bought by running this dodge-here-burn-there pass along every important edge in the frame (at 6:39 in the video). It does take time — that is precisely the distance between \"decent depth\" and \"powerful depth.\"","b":false},{"t":"p","x":"边缘分离解决的是层次的精细结构，收尾照旧：再做些曲线调整、Camera Raw 润色和降噪工作（视频 6:56 处），画面的层次和质感就都立起来了。这也是 Thomas 这张照片后期处理里最关键的一块拼图。","xe":"Edge separation resolves the fine structure of depth; the finish is business as usual — curves, a Camera Raw polish, and noise reduction (at 6:56 in the video), and both the layering and the texture of the frame lock into place. It is the keystone step in the post-processing of this photo.","b":false},{"t":"img","f":"v13","w":768,"h":480},{"t":"quote","x":"1. 层次感=分层+清晰边缘：又软又糊的边缘，全局对比和插件都救不了，要用边缘分离；2. Ctrl+Alt+Shift+E 盖印图层，选区羽化 1-2 像素，Shift 加选、Alt 减选；3. 加深暗侧、减淡亮侧，范围中间调、曝光 10% 以下，混合模式改明度保护色彩；4. 明显边界用快速选择工具，同一座山与背景明暗关系相反的部分要分段分开处理。","xe":"1. Depth = separated layers plus crisp edges: soft, mushy edges won't respond to global contrast or plugins — use edge separation; 2. Stamp the layers with Ctrl+Alt+Shift+E, feather selections 1-2 px, Shift to add and Alt to subtract; 3. Burn the dark side, dodge the bright side — Midtones range, exposure under 10%, Luminosity blend mode to protect color; 4. Trace obvious boundaries with the Quick Selection tool, and process segments of the same mountain separately when their brightness relation to the background flips.","b":false},{"t":"h","x":"欢迎关注@Thomas看看世界","xe":"Follow @Thomas Chu Photo,"},{"t":"h","x":"每周学会一个摄影技能","xe":"and learn one photography skill every week."}],"titleEn":"Photos Lacking Depth? Try the Edge Separation Technique in Post"}