59 lines
1.7 KiB
Markdown
59 lines
1.7 KiB
Markdown
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# Documentation
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- Class name: ImageScaleDownBy
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- Category: Art Venture/Utils
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- Output node: False
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ImageScaleDownBy节点用于按指定的缩放因子对图像进行缩小，同时保持原始图像的宽高比。它提供了一种简单直接的方法来降低图像的分辨率，这对于优化性能或为特定显示需求准备图像非常有用。
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# Input types
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## Required
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- images
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- images参数代表要进行缩小的图像。它对于定义将要进行缩放处理的输入图像至关重要。
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- Comfy dtype: IMAGE
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- Python dtype: torch.Tensor
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- scale_by
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- scale_by参数指定图像将被缩小的比例因子。它直接影响输出图像的新尺寸，同时保持其宽高比。
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- Comfy dtype: FLOAT
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- Python dtype: float
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# Output types
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- image
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- 输出是输入图像的缩小版本，其尺寸根据scale_by因子进行了调整。
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- Comfy dtype: IMAGE
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- Python dtype: torch.Tensor
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## Usage tips
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- Infra type: `GPU`
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- Common nodes: unknown
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## Source code
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```python
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class UtilImageScaleDownBy(UtilImageScaleDown):
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@classmethod
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def INPUT_TYPES(s):
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return {
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"required": {
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"images": ("IMAGE",),
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"scale_by": (
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"FLOAT",
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{"default": 0.5, "min": 0.01, "max": 1.0, "step": 0.01},
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),
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}
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}
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RETURN_TYPES = ("IMAGE",)
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CATEGORY = "Art Venture/Utils"
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FUNCTION = "image_scale_down_by"
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def image_scale_down_by(self, images, scale_by):
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width = images.shape[2]
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height = images.shape[1]
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new_width = int(width * scale_by)
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new_height = int(height * scale_by)
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return self.image_scale_down(images, new_width, new_height, "center")
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```
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