Image Stimulus¶

Description¶

An image stimulus loaded from any standard-format image file.

Note: To preserve the image’s aspect ratio on screen, x_size and y_size must be equal. When drawn, the larger dimension spans the full specified size, while the smaller dimension is scaled to maintain the aspect ratio.

Signature¶

stimulus/image_file

Required Parameters¶

path¶

Examples:	`images/image1.png`, `/path/to/image.png`

Filesystem path to the image file

x_size¶

Example:	`5.0`

Horizontal size (degrees)

y_size¶

Example:	`5.0`

Vertical size (degrees)

Optional Parameters¶

x_position¶

Default:	`0.0`

Horizontal center position (degrees)

y_position¶

Default:	`0.0`

Vertical center position (degrees)

rotation¶

Default:	`0.0`

Rotation (degrees)

alpha_multiplier¶

Default:	`1.0`

Controls the transparency of the stimulus. 1.0 is fully opaque, while 0.0 is fully tranparent.

deferred¶

Options:	`no`, `yes`, `explicit`
Default:	`no`

Controls when the stimulus is loaded. If no, the stimulus is loaded at experiment load time. If yes, the stimulus is loaded the first time it is queued. If explicit, the stimulus must be loaded explictly with Load Stimulus.