机器之能报道
编辑：Cardinal
以大模型、AIGC为代表的人工智能浪潮已经在悄然改变着我们生活及工作方式，但绝大部分人依然不知道该如何使用。
因此，我们推出了「AI在用」专栏，通过直观、有趣且简洁的人工智能使用案例，来具体介绍AI使用方法，并激发大家思考。
我们也欢迎读者投稿亲自实践的创新型用例。
人工拍摄的专业广告图片
为了让食物、化妆品、日用品等产品呈现出精致、极富吸引力的视觉效果，这类专业图片（ 带有编辑风格 ）的构图干净利落，背景简洁，利用精细的光影控制、微距拍摄等手法极为真实地展现物品的材质、纹理和细微部分，色彩也追求高对比、饱和度。
这类作品通常高于一般的静物纪实，更接近艺术表现的层次，由专业的广告摄影师来完成。现在，让我们跟随 X 用户 @Salmaaboukarr 学习如何利用 Midjourney 生成这些精美绝伦的产品特写。
来自 @Salmaaboukarr 利用 Midjourney生成的效果图
第一个案例，生成编辑风格的食材（柑橘类水果）特写。输入提示：
A vertical alignment of three citrus fruits with accompanying leaves. A stark white backdrop that enhances the vivid colours of the subjects. Water droplets on the leaves to convey freshness, and the gradation of ripeness from unripe green at the top to a mature wrinkled texture at the bottom. The glossy sheen on the fruits and leaves suggesting recent harvest or dew. A conceptual display of the citrus lifecycle, or variety, creating a vibrant contrast between colours and textures, invoking a sense of organic growth and vitality。
翻译过来：三种柑橘水果垂直排列，周围有相应的水果叶子。纯白色背景，能够突出主体鲜艳的颜色。
叶子上有水珠，传达出新鲜感，从上到下，水果的成熟程度逐渐递进，由绿色未成熟递进到最下面皱纹质地的成熟品种。
水果和叶子光滑发亮，给人一种刚采摘或露水未干的感觉。
整体构思是要展现出柑橘的生命周期，或者是展示不同品种，通过色彩和质地的鲜明对比，传达出生机盎然的感觉。
这是 Midjourney 生成的结果：
来自 @Salmaaboukarr
总的来说，这个提示希望生成一张富有质感和层次感的柑橘水果静物照，体现新鲜、生命力和多样性，背景简洁突出主体，通过细节营造出一种生机盎然的自然氛围。Midjourney 完成得不错。
这位作者总结了一个非常实用的公式，按照这个公式逐步描述就能清晰地传达想要生成图像的各个方面要求，让 AI 工具更好地理解并生成你期望的结果。
我们分别解释一下。主题（ subject description ）主要用于描述目标产品，比如种类、数量、排列方式等细节；背景（ background ） 描述背景信息，比如纯色背景、材质、对比度等；装饰元素（ additional elements ）描述需要添加其他辅助元素，比如水珠、光影、纹理等；动态效果（ effect ）描述想要达到的效果，比如新鲜度、光泽感等；构图（ overall composition ）描述整个构图的意图，比如想要展现多样性、对比等。
再来看一个有关树莓的案例。输入提示：
A single, ripe raspberry is the subject of this image, presented in vivid detail. Each individual drupelet, plump and glistening with moisture, stands out in a rich, red colour that suggests a juicy and fresh quality. The raspberry is delicately held between the thumb and forefinger, which have neatly manicured nails and appear soft, adding a human element to the composition. The background is deliberately blurred, ensuring the raspberry commands the viewer's focus. Additional elements, like the fine hairs on the drupelets that catch the light, contribute to the tactile realism of the fruit. The soft shadows cast by the fingers create an effect of depth. Overall, the composition is an intimate and detailed celebration of natural simplicity, emphasising the texture and freshness of the raspberry.
这段提示语描绘了一个细节入微、质感十足的新鲜树莓静物照。
主体部分，一颗单独饱满多汁的成熟树莓，以生动细腻的方式呈现。每个小粒都鲜红欲滴、水灵饱满、晶莹剔透，展现出树莓新鲜多汁的质地；
背景要求被有意虚化处理，确保观者的注意力全部集中在树莓本身；
添加了人物元素，树莓被拇指和食指娴熟地捏持，指甲修剪整洁,手指柔软；
动态效果，小粒上的细小绒毛在光线下闪耀，加强水果的真实质感；手指有阴影以创造出深度的层次感。
整体构图给人一种自然朴素之美，着重展现树莓的质地和新鲜感。
这是 Midjourney 生成的结果：
来自 @Salmaaboukarr
同样的提示，下面是我们用 DALL-E-3 生成的效果，你觉得哪个更好？
来自机器之能
A cluster of pastel-coloured macarons in shades of pink and cream, floating in mid-air against a white background, with soft shadows casting a gentle depth beneath each one. The macarons have a matte finish with tiny, sugary beads of condensation, suggesting a fresh, delicate texture. The scene is illuminated by a diffused light that creates a subtle glow on their surfaces, enhancing their dreamy, candy-like appearance. The composition is balanced and airy, with the macarons arranged in a way that allows the viewer's eye to wander from one sweet treat to the next in a seamless flow of confectionery delight
来自 @Salmaaboukarr
来自机器之能
A close-up view of several turquoise soap bubbles with varying sizes on a light blue background. The focus is sharp, capturing the shimmering highlights and intricate swirls within the bubbles. In the background, a soft gradient of white to teal represents a liquid surface, subtly suggesting water without explicit detail. Additional elements include smaller, frothy bubbles clustered around the larger, clear ones, creating a sense of depth and texture. The effect is one of delicate beauty and purity, with a hint of freshness evoked by the cool colour palette. The overall composition balances the simplicity of the subject with the complexity of the patterns within each bubble and the gentle contrast between the different sizes and the background gradient
来自 @Salmaaboukarr
来自机器之能
A detailed depiction of luscious, shiny caramel, featuring evident swirls and sleek surfaces, positioned atop a stark white backdrop to enhance contrast. Additional emphasis is placed on the texture and chromatic richness, underscoring its opulent make-up and intense brown shade. The imagery aims to embody the sumptuousness of artisanal melted chocolate or an elegant confectionery, presented in an aesthetically pleasing manner
来自 @Salmaaboukarr
同样的提示，下面是用 DALL-E-3 生成的效果，也不错：
来自机器之能
A cluster of ripe pomegranate arils, vivid ruby-red and plump, closely packed and occupying the entirety of the frame, with snippets of the pomegranate's cream-coloured, spongy membrane providing contrast against the glistening seeds; the seeds themselves exhibit a translucent quality that captures light, enhancing their jewel-like appearance; all set against a backdrop that fades into soft focus, drawing attention to the intricate details and dewy texture of the arils in the foreground; composed to evoke a sense of abundant freshness and natural beauty.
来自 @Salmaaboukarr
来自机器之能
这是一个极简主义风格的橙子静物照。输入提示：
A glistening orange slice is the focal point, its surface dotted with beads of juice. A soft, pale backdrop provides a minimalist stage that accentuates the subject. Dark, spherical beads adorn the slice, droplets, set against a curling strip of textured orange peel. The composition captures a small droplet of juice mid-flight, adding a sense of dynamic movement. This still-life arrangement celebrates the vivid colours and textures of citrus, inviting the viewer to sense the fresh, tangy aroma and flavour, encapsulating the artistry in nature's design
来自 @Salmaaboukarr
来自机器之能
以后我们会通过新专栏带来更多 AIGC 案例演示，也欢迎大家留言评论并给出改进建议。