ComfyUI Node: get region by center and size

get region by center and size:

The region-util-get-by-center-and-size node is designed to help you define a specific region within an image or canvas by specifying the center coordinates and the dimensions of the region. This node calculates the boundaries of the region based on the provided center point (cx, cy) and the width (w) and height (h) of the region. It is particularly useful for tasks that require precise cropping or focusing on a specific area within an image, such as zooming into a particular section or isolating a subject. By using this node, you can easily and accurately determine the exact coordinates of the region's edges, which can then be used for further image processing or manipulation.

get region by center and size Input Parameters:

cx

The cx parameter represents the x-coordinate of the center of the region. It determines the horizontal position of the region's center point. The value must be an integer, with a default of 128, and it can range from 0 to 10,000,000. Adjusting this value will shift the region horizontally within the image.

cy

The cy parameter represents the y-coordinate of the center of the region. It determines the vertical position of the region's center point. The value must be an integer, with a default of 128, and it can range from 0 to 10,000,000. Adjusting this value will shift the region vertically within the image.

w

The w parameter specifies the width of the region. It determines how wide the region will be, centered around the cx coordinate. The value must be an integer, with a default of 256, and it can range from 0 to 10,000,000. Changing this value will increase or decrease the horizontal span of the region.

h

The h parameter specifies the height of the region. It determines how tall the region will be, centered around the cy coordinate. The value must be an integer, with a default of 256, and it can range from 0 to 10,000,000. Changing this value will increase or decrease the vertical span of the region.

get region by center and size Output Parameters:

left

The left parameter represents the x-coordinate of the left edge of the region. It is calculated based on the center x-coordinate (cx) and the width (w) of the region.

top

The top parameter represents the y-coordinate of the top edge of the region. It is calculated based on the center y-coordinate (cy) and the height (h) of the region.

right

The right parameter represents the x-coordinate of the right edge of the region. It is calculated based on the center x-coordinate (cx) and the width (w) of the region.

bottom

The bottom parameter represents the y-coordinate of the bottom edge of the region. It is calculated based on the center y-coordinate (cy) and the height (h) of the region.

cx

The cx parameter is the same as the input cx, representing the x-coordinate of the center of the region.

cy

The cy parameter is the same as the input cy, representing the y-coordinate of the center of the region.

w

The w parameter is the same as the input w, representing the width of the region.

h

The h parameter is the same as the input h, representing the height of the region.

get region by center and size Usage Tips:

• To focus on a specific area within an image, set the cx and cy parameters to the coordinates of the desired center point and adjust the w and h parameters to define the size of the region.
• Use this node in combination with other image processing nodes to crop or manipulate specific regions within an image for tasks such as zooming, highlighting, or isolating subjects.

get region by center and size Common Errors and Solutions:

Invalid input range

• Explanation: The input values for cx, cy, 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 try again.

Non-integer input

• Explanation: The input values for cx, cy, w, or h are not integers.
• Solution: Make sure to provide integer values for all input parameters.