Why do AI images look so real?
Recent AI image generation、It is now possible to create visuals that are indistinguishable from photographed images at first glance.。
Well then、Why do AI images look so realistic?。
In conclusion,、AI learns “elements that look like photos”、Because I'm reproducing itです。
AI image generation is achieved by learning from huge amounts of image data.、How the light hits it、lens expression、Depth of the bounds written、texture etc.、Understand the visual structure specific to photography。
the result、Produces images that "look like photographs" to the human eye。
However, if you look at the details、AI images also retain some unique unnaturalness.。
In this article、We will organize and explain the reasons why AI images look realistic from the perspective of visual production.。
“Photo-likeness” that AI is learning
Photographs have a common visual structure
Images created through photography、There is a common visual structure。
For example, the following elements。
- relationship between light and shadow
- Depth of field (background blur)
- lens perspective
- Texture expression
- color tone
Photographers create visuals with these elements in mind.。
In advertising photos and product photos、Reality is created by controlling these elements.。
AI image generation、TheseLearning the visual structure of photos as dataI will。
the result、AI will be able to reproduce “image characteristics typical of photographs”。
Technical mechanism of AI image generation
Image generation using diffusion model
Many of the current AI image generation、**It is powered by a technology called Diffusion Model**.。
With this technology、The following process is used。
- Decompose the image into noise
- Learn how to restore images from noise
- Generate a new image from noise
In other words, AI、Assembling an image little by little from the noiseThe system generates visuals。
during this process、The learned image pattern will be used。
Light、composition、By combining information such as texture,、An image similar to a photo will be generated。
Human vision determines “photo-likeness”
The reason why AI images look so real、Characteristics of human visual recognitionis also related。
When humans look at images、It is not a detailed analysis。
First, we judge "photo-likeness" based on the following factors:。
- naturalness of light
- direction of shadow
- 3D effect of the subject
- background blur
When these elements look natural、humans view the imageEasier to recognize as a photo。
AI image generation reproduces these “characteristics that look like photographs”、Looks real to human vision。
Elements that create reality in AI images
In AI image generation、Reality is created by combining several elements.。
reproduction of light
Light plays an important role in photography。
AI image generation、Learn light patterns from training data、Reproduces natural lighting。
lens expression
Camera lenses have unique expressions。
For example
- background bokeh
- sense of distance
- flare
By reproducing these lens expressions,、AI images have a photo-like texture。
Texture
AI is also learning the features of the object's surface.。
For example
- skin
- Metal
- glass
- cloth
By reproducing these textures,、Visual reality becomes stronger。
Points to distinguish between AI images
AI images are becoming very realistic、When looking at details, unnatural parts may remain.。
Typical examples are:。
hands and fingers
In AI images、The shape of the hands and fingers may become unnatural.。
character
AI image generation is not good at reproducing text。
Characters on signs and packages may be damaged.。
fine structure
For complex shapes and fine details、May appear unnatural。
By looking at these parts、It may be possible to determine whether it is an AI image。
Reality in visual production
In visual production、There are situations where it is important to look realistic.。
For example
- advertising visual
- Product photo
- brand visual
In these areas、Reality is directly linked to reliability。
AI image generation、Demonstrates strong power in image sharing and concept visuals。
on the other hand、Visuals that feature real people or real locations may require photography。
Therefore, in current visual production、There are an increasing number of cases in which AI image generation and photography are used while dividing the roles.。
summary
Why AI images look so real、There are two major ones。
1The second thing is、AI image generationLearning the visual structure of photographs。
2The second thing is、human visionJudging reality based on elements such as light and three-dimensionalityです。
AI learns from huge amounts of image data.、It is now possible to reproduce visual elements typical of photographs.。
the result、At first glance, AI images may look like photographed images.。
However, if you look at the details、AI images may have some unique unnaturalness.。
Understanding these characteristics、This is also an important perspective for appropriately utilizing AI image generation in visual production.。
▶︎ [What is AI image generation? How it works, technology, and what it can do]
▶︎ [What is AI photography? Difference from AI image and how it works]
▶︎ [Differences between AI photos and live-action photos | Limits of generated visuals]
