ausboss
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- Keep (crop_from) picks the part of the picture a crop keeps: the
center, a side or a corner. Crop to fill used to cut from the middle
only.
- Two more Size choices that only cut and never resize: crop takes a
width x height piece, and crop to ratio takes the largest piece of a
shape such as 16:9. Ratio lists 13 shapes, or takes the shape from
the width and height boxes. Round to rounds these down so the piece
stays inside the picture.
- Two small pictures on the node show the file going in, with the kept
part lit and the cut part dark, and the picture coming out, both on
one scale. Between them the node names the shape and what happens
("3:4 -> 1:1", "77% size", "cuts 449 px of height"). A click on the
first picture picks the part to keep.
The browser repeats the new arithmetic, and the shared table of cases
(now 469) holds it to the backend's answers.
5.2 KiB
Load Image
Loads a picture and sets its size in the same node, so a workflow does not need a resize node and a size node after its loader.
Pick a file in Source, press Load to upload one, or use the arrows under it to step through the pictures in ComfyUI's input folder. The line beside the arrows shows the size of the file and, when the size changes, the size that comes out:
912 × 1632 → 1144 × 2048
That is the real output size, worked out before you run.
Under that line are two small pictures: the file as it goes in, and the
picture as it comes out. On the first one the part that is kept is lit and
the part that is cut off is dark. Between them the node says the shape
(3:4 → 1:1) and what happens (77% size, cuts 449 px of height).
Size
Size (size) picks how the picture is resized. Each choice shows only
the numbers it uses.
| Choice | What it does | Its number |
|---|---|---|
| off | The picture comes out exactly as the file has it. | none |
| megapixels | Brings the whole picture to a total size and keeps its shape. | Megapixels (megapixels): 1.0 is about 1024 × 1024 |
| longest side | Sets the longer edge; the other edge follows. | Longest side (longest_side), in pixels |
| scale | Multiplies both edges. | Scale (scale): 0.5 is half, 2 is double |
| fit inside | Makes the picture as big as it can be inside a box, with nothing cut off. | Width and Height (width, height) |
| crop to fill | Covers the box completely and cuts off what sticks out. | Width and Height |
| crop | Cuts a piece of that size out of the picture. Nothing is resized. | Width and Height |
| crop to ratio | Cuts the largest piece of a shape, such as 16:9, out of the picture. Nothing is resized. | Ratio (ratio) |
Round to (multiple) rounds the new width and height to a multiple of
that number. Most models want 8 or 16. Set it to 1 to keep the numbers as
they are. It does nothing while Size is off.
Which part is kept
The three crop choices show Keep (crop_from). It picks the part of the
picture that stays: center cuts evenly from both sides, top keeps the top
and cuts from the bottom, bottom left keeps that corner, and so on.
You can also click the first small picture: click its top to keep the top, a corner to keep that corner. The lit part moves so you see what you get.
In Ratio, width : height takes the shape from the Width and Height
boxes, for a shape that is not in the list (1600 and 900 give 16:9).
More
- Method (
method): how pixels are resampled.lanczosis the sharpest for photos.nearestkeeps pixel art crisp. - Enlarge (
enlarge): on, a small picture is made bigger to reach the size you asked for. Off, a picture is only ever made smaller: one that is already below the target comes out at its own size, and crop to fill cuts the box's shape out of it without growing it.
The picture on the node
The picture under the settings is ComfyUI's own preview, the same one the stock Load Image shows. Drop a file on the node or paste one to upload it, and right-click the node for the mask editor and for copy and paste.
Outputs
image: the picture at its new size.mask: white where the picture is see-through and black where it is solid, as the stock loader gives it. A picture with no transparency gives an all black mask. It is always the same size asimage.width,height: the size that comes out.filename: the file's name without its folder or its ending (shots/hero.pnggiveshero), ready for a save node's prefix.original_width,original_height: the size of the file before any resize. Use them to bring a result back to the size you started from.
Which loader to use
- Load Image (this node): load a picture and set its size.
- Load Image + Pad: add empty space around a picture for outpainting.
- Image Crop + Rotate + Pad: turn, crop and pad a picture by hand.
Technical details
- Every frame of an animated file comes through as a batch, all at the same new size. A phone photo is turned the way its EXIF data says.
- With Size off the pixels are the file's own, bit for bit, and Round to is not applied.
- Rounding moves each edge to the nearest multiple, so the shape can change by up to half a step. Fit inside rounds down instead, so the result never leaves its box.
- Crop to fill resizes the picture until it covers the box, then cuts the box out at the side Keep names. The mask goes through the same resize and the same cut.
- Crop and crop to ratio only cut. A box larger than the picture is cut down to the picture, and Round to rounds down so the piece stays inside it. Enlarge does not apply to them.
- The small pictures are drawn on one scale, so a picture made half as large is drawn half as large.
- With Enlarge off, a rounded size is rounded down so it never passes the file's own size.
- The size line on the node uses the same arithmetic as the run. The pack's tests hold the two to the same answers over a table of cases.
- Files are read only from ComfyUI's input, output and temp folders. A name
such as
photo.png [output]loads a picture ComfyUI made. - The node runs again when the file changes on disk or a setting changes.