A set of nodes for ComfyUI that can composite layer and mask to achieve Photoshop like functionality.
The LayerUtility: ImageRemoveAlpha node is a specialized component within the ComfyUI framework that assists users in manipulating image data. This node is designed to remove the alpha channel from RGBA images and optionally fill areas of transparency with a specified background color. This functionality is particularly useful for preparing images for environments that do not support transparency or for aesthetic adjustments in image compositions.
This node processes a batch of images that include an alpha channel, effectively converting RGBA images into RGB format. If required, it fills the transparent regions with a custom color. The node also allows users to apply a mask to control which areas of the image are affected.
The LayerUtility: ImageRemoveAlpha node accepts the following inputs:
RGBA_image (Required): This input expects one or more images with an alpha channel (RGBA format). These images will be processed to remove the alpha channel.
fill_background (Required Boolean): A boolean toggle that determines whether the transparent areas of the image should be filled with a background color. By default, this is set to False, meaning that the alpha channel is simply removed without filling.
background_color (Required, Default: #000000): Specifies the color used to fill the transparent parts of the images if fill_background is set to True. The color is provided in hexadecimal format, and defaults to black (#000000).
mask (Optional): This input can be used to supply a mask image that specifies which parts of the image's alpha channel should be preserved during processing. If a mask is supplied, it influences how the background is filled.
The node produces the following output:
fill_background is set to True, any former transparent areas are filled with the specified background_color.In typical ComfyUI workflows, the LayerUtility: ImageRemoveAlpha node can be used when working with images that require conversion from RGBA to RGB format. It is particularly useful in scenarios where transparency is either undesirable or unsupported by subsequent processing steps or output formats. The node can be inserted into workflows that need to standardize image inputs or prepare images for further processing by nodes that do not handle transparency.
Using this node can enhance image processing pipelines by ensuring consistent and predictable image outputs, especially in automated design systems or batch processing environments.
Masking Capability: The ability to input a mask enables selective preservation of transparency in parts of the image. This feature provides users with fine-grained control over how transparency is handled, allowing for sophisticated compositing techniques.
Customizable Background: Users can select any background color to fill the transparent areas, offering flexibility in the visual outcome. This feature is valuable for ensuring visual harmony in compositions or when matching corporate or artistic color schemes.
Error Handling: The node includes error handling to gracefully manage scenarios where the input images do not have an alpha channel, or when the specified mask is not appropriately aligned with the images.
For further details or updates, users are encouraged to visit the GitHub repository. Explore the repository for additional nodes that may enhance your image processing workflows within ComfyUI.