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update IMG2IMG.md

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docs/features/IMG2IMG.md
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@ -12,21 +12,19 @@ stable diffusion to build the prompt on top of the image you provide, preserving
the original's basic shape and layout. To use it, provide the `--init_img`
option as shown here:
```commandline
tree on a hill with a river, nature photograph, national geographic -I./test-pictures/tree-and-river-sketch.png -f 0.85
```
!!! example ""
This will take the original image shown here:
```commandline
tree on a hill with a river, nature photograph, national geographic -I./test-pictures/tree-and-river-sketch.png -f 0.85
```
<figure markdown>
![original-image](https://user-images.githubusercontent.com/50542132/193946000-c42a96d8-5a74-4f8a-b4c3-5213e6cadcce.png){ width=320 }
</figure>
<figure markdown>
and generate a new image based on it as shown here:
| original image | generated image |
| :------------: | :-------------: |
| ![original-image](https://user-images.githubusercontent.com/50542132/193946000-c42a96d8-5a74-4f8a-b4c3-5213e6cadcce.png){ width=320 } | ![generated-image](https://user-images.githubusercontent.com/111189/194135515-53d4c060-e994-4016-8121-7c685e281ac9.png){ width=320 } |
<figure markdown>
![generated-image](https://user-images.githubusercontent.com/111189/194135515-53d4c060-e994-4016-8121-7c685e281ac9.png){ width=320 }
</figure>
</figure>
The `--init_img` (`-I`) option gives the path to the seed picture. `--strength`
(`-f`) controls how much the original will be modified, ranging from `0.0` (keep
@ -88,13 +86,15 @@ from a prompt. If the step count is 10, then the "latent space" (Stable
Diffusion's internal representation of the image) for the prompt "fire" with
seed `1592514025` develops something like this:
```bash
invoke> "fire" -s10 -W384 -H384 -S1592514025
```
!!! example ""
<figure markdown>
![latent steps](../assets/img2img/000019.steps.png)
</figure>
```bash
invoke> "fire" -s10 -W384 -H384 -S1592514025
```
<figure markdown>
![latent steps](../assets/img2img/000019.steps.png){ width=720 }
</figure>
Put simply: starting from a frame of fuzz/static, SD finds details in each frame
that it thinks look like "fire" and brings them a little bit more into focus,
@ -109,25 +109,23 @@ into the sequence at the appropriate point, with just the right amount of noise.
### A concrete example
I want SD to draw a fire based on this hand-drawn image:
!!! example "I want SD to draw a fire based on this hand-drawn image"
<figure markdown>
![drawing of a fireplace](../assets/img2img/fire-drawing.png)
</figure>
![drawing of a fireplace](../assets/img2img/fire-drawing.png){ align=left }
Let's only do 10 steps, to make it easier to see what's happening. If strength
is `0.7`, this is what the internal steps the algorithm has to take will look
like:
Let's only do 10 steps, to make it easier to see what's happening. If strength
is `0.7`, this is what the internal steps the algorithm has to take will look
like:
<figure markdown>
![gravity32](../assets/img2img/000032.steps.gravity.png)
</figure>
<figure markdown>
![gravity32](../assets/img2img/000032.steps.gravity.png)
</figure>
With strength `0.4`, the steps look more like this:
With strength `0.4`, the steps look more like this:
<figure markdown>
![gravity30](../assets/img2img/000030.steps.gravity.png)
</figure>
<figure markdown>
![gravity30](../assets/img2img/000030.steps.gravity.png)
</figure>
Notice how much more fuzzy the starting image is for strength `0.7` compared to
`0.4`, and notice also how much longer the sequence is with `0.7`: