ComfyUI Node: Get Image Range From Batch

Get Image Range From Batch:

The GetImageRangeFromBatch node is designed to create a new batch of images by selecting a specific range of images from an existing batch. This node is particularly useful when you need to extract a subset of images from a larger collection for further processing or analysis. By specifying a starting index and the number of frames, you can precisely control which images are included in the new batch. This functionality is essential for tasks that require working with specific segments of image sequences, such as animation, video processing, or any scenario where you need to isolate and manipulate a particular range of images. Additionally, the node can handle optional masks, allowing for more complex operations involving both images and their corresponding masks.

Get Image Range From Batch Input Parameters:

images

This parameter represents the input batch of images from which a range will be selected. It is a required parameter and must be provided for the node to function. The images should be in a format that the node can process, typically as a list or array of image data.

start_index

The start_index parameter specifies the starting point in the input batch from which the selection of images will begin. It is an integer value with a default of 0, a minimum of -1, and a maximum of 4096. If set to -1, the selection will start from the end of the batch minus the number of frames specified. This parameter is crucial for determining the exact position in the batch where the extraction starts.

num_frames

The num_frames parameter defines the number of consecutive images to be included in the new batch, starting from the start_index. It is an integer value with a default of 1, a minimum of 1, and a maximum of 4096. This parameter allows you to control the size of the new batch by specifying how many images to extract.

masks

This optional parameter allows you to provide a corresponding batch of masks for the images. If provided, the node will also extract the specified range of masks along with the images. This is useful for operations that require both images and their associated masks, ensuring that the masks are aligned with the selected images.

Get Image Range From Batch Output Parameters:

IMAGE

The IMAGE output parameter contains the new batch of images that were selected based on the specified start_index and num_frames. This output is essential for any subsequent processing or analysis tasks that require the extracted subset of images.

MASK

The MASK output parameter contains the new batch of masks corresponding to the selected images, if the masks input parameter was provided. This output ensures that any operations involving masks can proceed with the correct subset of masks aligned with the images.

Get Image Range From Batch Usage Tips:

• To extract the last few images from a batch, set the start_index to -1 and adjust the num_frames accordingly.
• Ensure that the start_index and num_frames values are within the valid range of the input batch to avoid errors.
• Use the masks parameter if you need to work with both images and their corresponding masks, ensuring they are processed together.

Get Image Range From Batch Common Errors and Solutions:

Get Image Range From Batch: Start index is out of range

• Explanation: This error occurs when the start_index is set to a value that is outside the valid range of the input batch.
• Solution: Verify that the start_index is within the bounds of the input batch. Adjust the value to ensure it falls within the valid range.

Get Image Range From Batch: End index is out of range

• Explanation: This error occurs when the calculated end index (start_index + num_frames) exceeds the length of the input batch.
• Solution: Ensure that the combination of start_index and num_frames does not exceed the total number of images in the input batch. Adjust the num_frames or start_index to fit within the batch size.