ComfyUI Node: get region by left top

get region by left top:

The region-util-get-by-lt node is designed to help you define a rectangular region within an image or canvas by specifying the coordinates of the top-left corner along with the width and height of the region. This node is particularly useful for tasks that require precise cropping or region selection based on the left and top coordinates. By providing these parameters, the node calculates the center coordinates and the bottom-right corner of the region, making it easier to manage and manipulate specific areas within your artwork. This functionality is essential for AI artists who need to focus on or isolate particular sections of an image for further processing or enhancement.

get region by left top Input Parameters:

left

The left parameter specifies the x-coordinate of the top-left corner of the region. It determines how far the region is from the left edge of the image or canvas. The value must be an integer between 0 and 10,000,000, with a default value of 0. Adjusting this parameter shifts the region horizontally.

top

The top parameter specifies the y-coordinate of the top-left corner of the region. It determines how far the region is from the top edge of the image or canvas. The value must be an integer between 0 and 10,000,000, with a default value of 0. Adjusting this parameter shifts the region vertically.

w

The w parameter defines the width of the region. It must be an integer between 0 and 10,000,000, with a default value of 256. This parameter controls the horizontal size of the region, allowing you to expand or contract it as needed.

h

The h parameter defines the height of the region. It must be an integer between 0 and 10,000,000, with a default value of 256. This parameter controls the vertical size of the region, allowing you to expand or contract it as needed.

get region by left top Output Parameters:

left

The left output parameter returns the x-coordinate of the top-left corner of the region, which is the same as the input left parameter.

top

The top output parameter returns the y-coordinate of the top-left corner of the region, which is the same as the input top parameter.

right

The right output parameter provides the x-coordinate of the bottom-right corner of the region. It is calculated based on the left and w parameters.

bottom

The bottom output parameter provides the y-coordinate of the bottom-right corner of the region. It is calculated based on the top and h parameters.

cx

The cx output parameter returns the x-coordinate of the center of the region. It is calculated as the midpoint between the left and right coordinates.

cy

The cy output parameter returns the y-coordinate of the center of the region. It is calculated as the midpoint between the top and bottom coordinates.

w

The w output parameter returns the width of the region, which is the same as the input w parameter.

h

The h output parameter returns the height of the region, which is the same as the input h parameter.

get region by left top Usage Tips:

• Use the left and top parameters to precisely position the region within your image or canvas.
• Adjust the w and h parameters to define the exact size of the region you want to work with.
• Utilize the output parameters to get the coordinates of the region's corners and center, which can be useful for further image processing tasks.

get region by left top Common Errors and Solutions:

Invalid input value

• Explanation: This error occurs when the input values for left, top, w, or h are outside the allowed range (0 to 10,000,000).
• Solution: Ensure that all input values are within the specified range and are integers.

Missing input parameter

• Explanation: This error occurs when one or more required input parameters are not provided.
• Solution: Make sure to provide values for all required input parameters: left, top, w, and h.

Unexpected output values

• Explanation: This error occurs when the output values do not match the expected coordinates or dimensions.
• Solution: Double-check the input values and ensure they are correctly set. Verify the calculations if custom logic is applied.