This topic describes the ST_ScaleImage function. This function scales down the size of an image in a scene object.
Syntax
scene ST_ScaleImage(scene sc, cstring name, float8 scale);Parameters
| Parameter | Description |
|---|---|
| sc | The scene object. |
| name | The name of the image. A pair of single quotation marks ('') indicates all images. |
| scale | The scale of the image. |
Description
This function scales down the size of the image in a scene object based on a given value. The value of the scale parameter falls in the range of (0, 1).
The name parameter specifies the name of the image. If this parameter is empty, the sizes of all images are scaled down.
A small value of the scale parameter indicates that the image occupies a small amount of storage and has a low resolution.
- Original image with scale of 1.0
- Image after scale-down with scale of 0.125
Examples
SELECT ST_AsText(ST_ScaleImage(scene, '', 0.1)) from t;
--------
{"type" : "gltf", "content" : {"accessors":[{"bufferView":0,......