# `gradio_image_annotation` A Gradio component that can be used to annotate images with bounding boxes. ## Installation ```bash pip install gradio_image_annotation ``` ## Usage ```python import gradio as gr from gradio_image_annotation import image_annotator example = { "image": "https://raw.githubusercontent.com/gradio-app/gradio/main/guides/assets/logo.png", "boxes": [ { "xmin": 30, "ymin": 70, "xmax": 530, "ymax": 500, "label": "Gradio", "color": (250, 185, 0), } ] } def crop(annotations): if annotations["boxes"]: box = annotations["boxes"][0] return annotations["image"][ box["ymin"]:box["ymax"], box["xmin"]:box["xmax"] ] return None def get_boxes_json(annotations): return [ {k: box[k] for k in box if k in ("xmin", "ymin", "xmax", "ymax", "label")} for box in annotations["boxes"] ] with gr.Blocks() as demo: with gr.Tab("Crop"): with gr.Row(): annotator_crop = image_annotator(example, image_type="numpy") image_crop = gr.Image() button_crop = gr.Button("Crop") button_crop.click(crop, annotator_crop, image_crop) with gr.Tab("Object annotation"): annotator = image_annotator( {"image": "https://gradio-builds.s3.amazonaws.com/demo-files/base.png"}, label_list=["Person", "Vehicle"], label_colors=[(0, 255, 0), (255, 0, 0)], ) button_get = gr.Button("Get bounding boxes") json_boxes = gr.JSON() button_get.click(get_boxes_json, annotator, json_boxes) if __name__ == "__main__": demo.launch() ``` ## `image_annotator` ### Initialization
name | type | default | description |
---|---|---|---|
value |
```python dict | None ``` | None |
A dict or None. The dictionary must contain a key 'image' with either an URL to an image, a numpy image or a PIL image. Optionally it may contain a key 'boxes' with a list of boxes. Each box must be a dict wit the keys: 'xmin', 'ymin', 'xmax' and 'ymax' with the absolute image coordinates of the box. Optionally can also include the keys 'label' and 'color' describing the label and color of the box. Color must be a tuple of RGB values (e.g. `(255,255,255)`). |
boxes_alpha |
```python float | None ``` | None |
Opacity of the bounding boxes 0 and 1. |
label_list |
```python list[str] | None ``` | None |
List of valid labels. |
label_colors |
```python list[str] | None ``` | None |
Optional list of colors for each label when `label_list` is used. Colors must be a tuple of RGB values (e.g. `(255,255,255)`). |
box_min_size |
```python int | None ``` | None |
Minimum valid bounding box size. |
height |
```python int | str | None ``` | None |
The height of the displayed image, specified in pixels if a number is passed, or in CSS units if a string is passed. |
width |
```python int | str | None ``` | None |
The width of the displayed image, specified in pixels if a number is passed, or in CSS units if a string is passed. |
image_mode |
```python "1" | "L" | "P" | "RGB" | "RGBA" | "CMYK" | "YCbCr" | "LAB" | "HSV" | "I" | "F" ``` | "RGB" |
"RGB" if color, or "L" if black and white. See https://pillow.readthedocs.io/en/stable/handbook/concepts.html for other supported image modes and their meaning. |
sources |
```python list["upload" | "clipboard"] | None ``` | ["upload", "clipboard"] |
List of sources for the image. "upload" creates a box where user can drop an image file, "clipboard" allows users to paste an image from the clipboard. If None, defaults to ["upload", "clipboard"]. |
image_type |
```python "numpy" | "pil" | "filepath" ``` | "numpy" |
The format the image is converted before being passed into the prediction function. "numpy" converts the image to a numpy array with shape (height, width, 3) and values from 0 to 255, "pil" converts the image to a PIL image object, "filepath" passes a str path to a temporary file containing the image. If the image is SVG, the `type` is ignored and the filepath of the SVG is returned. |
label |
```python str | None ``` | None |
The label for this component. Appears above the component and is also used as the header if there are a table of examples for this component. If None and used in a `gr.Interface`, the label will be the name of the parameter this component is assigned to. |
container |
```python bool ``` | True |
If True, will place the component in a container - providing some extra padding around the border. |
scale |
```python int | None ``` | None |
relative size compared to adjacent Components. For example if Components A and B are in a Row, and A has scale=2, and B has scale=1, A will be twice as wide as B. Should be an integer. scale applies in Rows, and to top-level Components in Blocks where fill_height=True. |
min_width |
```python int ``` | 160 |
minimum pixel width, will wrap if not sufficient screen space to satisfy this value. If a certain scale value results in this Component being narrower than min_width, the min_width parameter will be respected first. |
interactive |
```python bool | None ``` | True |
if True, will allow users to upload and annotate an image; if False, can only be used to display annotated images. |
visible |
```python bool ``` | True |
If False, component will be hidden. |
elem_id |
```python str | None ``` | None |
An optional string that is assigned as the id of this component in the HTML DOM. Can be used for targeting CSS styles. |
elem_classes |
```python list[str] | str | None ``` | None |
An optional list of strings that are assigned as the classes of this component in the HTML DOM. Can be used for targeting CSS styles. |
render |
```python bool ``` | True |
If False, component will not render be rendered in the Blocks context. Should be used if the intention is to assign event listeners now but render the component later. |
show_label |
```python bool | None ``` | None |
if True, will display label. |
show_download_button |
```python bool ``` | True |
If True, will show a button to download the image. |
show_share_button |
```python bool | None ``` | None |
If True, will show a share icon in the corner of the component that allows user to share outputs to Hugging Face Spaces Discussions. If False, icon does not appear. If set to None (default behavior), then the icon appears if this Gradio app is launched on Spaces, but not otherwise. |
show_clear_button |
```python bool | None ``` | True |
If True, will show a clear button. |