Read Camera Image

## Read Camera Image

![](/media/202601/2026-01-19_180102_6180590.38505614691810575.png)
> Read images from the physical camera's existing image cache and clear the image cache.

## Module Principle
Calls camera interfaces, mainly image capturing and cache clearing interfaces.

## Usage Scenarios
Used when camera triggering exceptions or other situations cause excess image cache to be generated, requiring this module to read or clear the cache.

## Usage Method
Add this module when clearing is needed, connect the camera, and adjust module parameters as needed.

### Predecessor/Successor Modules
Generally located after camera image acquisition to assist in operating the camera cache.

### Usage Example
<video width="640" height="360" controls>
  <source src="/media/attachment/2026/01/%E8%AF%BB%E5%8F%96%E7%9B%B8%E6%9C%BA%E5%9B%BE%E5%83%8F%E4%BD%BF%E7%94%A8%E7%A4%BA%E4%BE%8B.mp4">
</video>

## Example Project

> [Click to Download Project](http://zhunyitec.local:30067/media/attachment/2026/01/%E8%AF%BB%E5%8F%96%E7%9B%B8%E6%9C%BA%E5%9B%BE%E5%83%8F%E6%B5%8B%E8%AF%95%E5%B7%A5%E7%A8%8B.zip)

## Parameter Configuration Description

### Basic Parameters

![](/media/202601/2026-01-19_181551_0263730.45696049876599.png)
> **[Select Camera]** Connect the camera you want to operate. Select "Camera 0", "Camera 1"... based on the physical camera. If "Not Set" is selected, read and clear operations will not be performed.
> **[Read Image Timeout]** The time consumed for reading an image. If no image is read after this time, the subsequent operations will continue.
> **[Operation After Reading Image]** Select "Keep Newly Acquired Image" to clear only this image from the camera cache after reading one image; Select "Clear Newly Acquired Image" to empty the camera cache after reading one image.

## Output Description

![](/media/202601/2026-01-19_181608_6443000.802124965411407.png)

> **[Run Result]** Outputs true if the physical camera has image cache and one image is successfully read, otherwise outputs false.
> **[Mono Image]** One image successfully read from the camera cache. If reading is normal, outputs the image size, otherwise outputs "N/A".

## Precautions
Generally, this module is not needed. It is only required to read or clear the cache when camera triggering exceptions or other unexpected situations cause excess image cache to be generated.

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Click here to jump to the corresponding Chinese manual page: [Read Camera Image](/doc/312)