ComfyUI Node: Nuke Viewer

Nuke Viewer:

The NukeViewer node is designed to replicate the viewer functionality found in Nuke, a popular compositing software used in visual effects and post-production. This node allows you to visualize images with various channel display options, making it a versatile tool for examining different aspects of your image data. By providing control over gamma and gain, it enables you to adjust the brightness and contrast of the image, enhancing your ability to analyze and fine-tune visual elements. Additionally, the NukeViewer supports overlay features, allowing you to display custom text on the image, which can be useful for annotations or notes during the creative process. This node is particularly beneficial for artists and designers who need to inspect and manipulate image channels in a flexible and intuitive manner.

Nuke Viewer Input Parameters:

image

The image parameter is the primary input for the NukeViewer node, representing the image data you wish to visualize. This parameter accepts an image in a compatible format, allowing the node to process and display it according to the specified settings.

channel

The channel parameter allows you to select which channel of the image to display. Options include "rgba", "rgb", "red", "green", "blue", "alpha", and "luminance", with "rgba" being the default. This selection determines which color or component of the image is visualized, enabling you to focus on specific aspects of the image data.

gamma

The gamma parameter controls the gamma correction applied to the image, affecting its overall brightness. It is a float value with a default of 1.0, a minimum of 0.1, and a maximum of 3.0, adjustable in steps of 0.1. Modifying the gamma can help in enhancing details in darker or lighter areas of the image.

gain

The gain parameter adjusts the gain applied to the image, influencing its contrast. It is a float value with a default of 1.0, a minimum of 0.1, and a maximum of 5.0, adjustable in steps of 0.1. Increasing the gain can make the image appear more vivid by amplifying the differences between light and dark areas.

show_overlay

The show_overlay parameter is a boolean that determines whether to display an overlay on the image. By default, it is set to False. When enabled, it allows you to add textual information on top of the image, which can be useful for annotations or additional context.

overlay_text

The overlay_text parameter is a string that specifies the text to be displayed as an overlay on the image. This text appears when the show_overlay parameter is enabled, providing a way to add notes or labels directly onto the visualized image.

mask

The mask parameter is an optional input that allows you to provide a mask image. This mask can be used to selectively display or process parts of the main image, offering additional control over which areas are affected by the node's settings.

Nuke Viewer Output Parameters:

IMAGE

The output of the NukeViewer node is an IMAGE, which represents the processed and visualized version of the input image. This output reflects the adjustments made through the node's parameters, such as channel selection, gamma correction, gain adjustment, and any overlays applied. The resulting image can be used for further analysis or as a reference in your creative workflow.

Nuke Viewer Usage Tips:

• To focus on specific color components, use the channel parameter to isolate and examine individual channels like "red" or "alpha", which can be particularly useful for tasks involving color correction or compositing.
• Adjust the gamma and gain parameters to enhance the visibility of details in your image, especially when working with high dynamic range images or when specific areas of the image need more emphasis.
• Utilize the show_overlay and overlay_text parameters to add annotations directly onto your image, which can be helpful for collaborative projects or when documenting your workflow.

Nuke Viewer Common Errors and Solutions:

Invalid image format

• Explanation: This error occurs when the input image is not in a compatible format that the NukeViewer node can process.
• Solution: Ensure that the image is in a supported format, such as a standard image file type, and try re-importing it into the node.

Channel not found

• Explanation: This error indicates that the selected channel is not available in the input image.
• Solution: Verify that the input image contains the channel you are trying to view, and select a channel that exists within the image data.

Overlay text not displaying

• Explanation: This issue arises when the show_overlay parameter is not enabled, preventing the overlay text from appearing.
• Solution: Make sure the show_overlay parameter is set to True to display the overlay text on the image.