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description: Learn how to view image results inside a compatible VSCode terminal. | |
keywords: YOLOv8, VSCode, Terminal, Remote Development, Ultralytics, SSH, Object Detection, Inference, Results, Remote Tunnel, Images, Helpful, Productivity Hack | |
# Viewing Inference Results in a Terminal | |
<p align="center"> | |
<img width="800" src="https://raw.githubusercontent.com/saitoha/libsixel/data/data/sixel.gif" alt="Sixel example of image in Terminal"> | |
</p> | |
Image from the [libsixel](https://saitoha.github.io/libsixel/) website. | |
## Motivation | |
When connecting to a remote machine, normally visualizing image results is not possible or requires moving data to a local device with a GUI. The VSCode integrated terminal allows for directly rendering images. This is a short demonstration on how to use this in conjunction with `ultralytics` with [prediction results](../modes/predict.md). | |
!!! warning | |
Only compatible with Linux and MacOS. Check the VSCode [repository](https://github.com/microsoft/vscode), check [Issue status](https://github.com/microsoft/vscode/issues/198622), or [documentation](https://code.visualstudio.com/docs) for updates about Windows support to view images in terminal with `sixel`. | |
The VSCode compatible protocols for viewing images using the integrated terminal are [`sixel`](https://en.wikipedia.org/wiki/Sixel) and [`iTerm`](https://iterm2.com/documentation-images.html). This guide will demonstrate use of the `sixel` protocol. | |
## Process | |
1. First, you must enable settings `terminal.integrated.enableImages` and `terminal.integrated.gpuAcceleration` in VSCode. | |
```yaml | |
"terminal.integrated.gpuAcceleration": "auto" # "auto" is default, can also use "on" | |
"terminal.integrated.enableImages": false | |
``` | |
<p align="center"> | |
<img width="800" src="https://github.com/ultralytics/ultralytics/assets/62214284/d158ab1c-893c-4397-a5de-2f9f74f81175" alt="VSCode enable terminal images setting"> | |
</p> | |
1. Install the `python-sixel` library in your virtual environment. This is a [fork](https://github.com/lubosz/python-sixel?tab=readme-ov-file) of the `PySixel` library, which is no longer maintained. | |
```bash | |
pip install sixel | |
``` | |
1. Import the relevant libraries | |
```py | |
import io | |
import cv2 as cv | |
from ultralytics import YOLO | |
from sixel import SixelWriter | |
``` | |
1. Load a model and execute inference, then plot the results and store in a variable. See more about inference arguments and working with results on the [predict mode](../modes/predict.md) page. | |
```{ .py .annotate } | |
from ultralytics import YOLO | |
# Load a model | |
model = YOLO("yolov8n.pt") | |
# Run inference on an image | |
results = model.predict(source="ultralytics/assets/bus.jpg") | |
# Plot inference results | |
plot = results[0].plot() #(1)! | |
``` | |
1. See [plot method parameters](../modes/predict.md#plot-method-parameters) to see possible arguments to use. | |
1. Now, use OpenCV to convert the `numpy.ndarray` to `bytes` data. Then use `io.BytesIO` to make a "file-like" object. | |
```{ .py .annotate } | |
# Results image as bytes | |
im_bytes = cv.imencode( | |
".png", #(1)! | |
plot, | |
)[1].tobytes() #(2)! | |
# Image bytes as a file-like object | |
mem_file = io.BytesIO(im_bytes) | |
``` | |
1. It's possible to use other image extensions as well. | |
2. Only the object at index `1` that is returned is needed. | |
1. Create a `SixelWriter` instance, and then use the `.draw()` method to draw the image in the terminal. | |
```py | |
# Create sixel writer object | |
w = SixelWriter() | |
# Draw the sixel image in the terminal | |
w.draw(mem_file) | |
``` | |
## Example Inference Results | |
<p align="center"> | |
<img width="800" src="https://github.com/ultralytics/ultralytics/assets/62214284/6743ab64-300d-4429-bdce-e246455f7b68" alt="View Image in Terminal"> | |
</p> | |
!!! danger | |
Using this example with videos or animated GIF frames has **not** been tested. Attempt at your own risk. | |
## Full Code Example | |
```{ .py .annotate } | |
import io | |
import cv2 as cv | |
from ultralytics import YOLO | |
from sixel import SixelWriter | |
# Load a model | |
model = YOLO("yolov8n.pt") | |
# Run inference on an image | |
results = model.predict(source="ultralytics/assets/bus.jpg") | |
# Plot inference results | |
plot = results[0].plot() #(3)! | |
# Results image as bytes | |
im_bytes = cv.imencode( | |
".png", #(1)! | |
plot, | |
)[1].tobytes() #(2)! | |
mem_file = io.BytesIO(im_bytes) | |
w = SixelWriter() | |
w.draw(mem_file) | |
``` | |
1. It's possible to use other image extensions as well. | |
2. Only the object at index `1` that is returned is needed. | |
3. See [plot method parameters](../modes/predict.md#plot-method-parameters) to see possible arguments to use. | |
--- | |
!!! tip | |
You may need to use `clear` to "erase" the view of the image in the terminal. | |