imaqReadMeter
Usage
int imaqReadMeter(const Image* image, const MeterArc* arcInfo, double* percentage, PointFloat* endOfNeedle);
Purpose
Reads a meter. You must have already determined the arc information with imaqGetMeterArc().
Image Types Supported
IMAQ_IMAGE_U8, IMAQ_IMAGE_I16, IMAQ_IMAGE_SGL
Parameters
|
Name
|
Type
|
Description
|
|---|---|---|
| image | const Image* | The image of the meter to read. |
| arcInfo | const MeterArc* | Information about the meter's arc. This information is returned by imaqGetMeterArc() |
| percentage | double* | Returns the current sweep position of the needle in comparison to the maximum sweep position, expressed as a percentage. For example, a value of 100 indicates the needle is at the maximum sweep position. Set this parameter to NULL if you do not need this information. |
| endOfNeedle | PointFloat* | Returns the location of the endpoint of the needle. Set this parameter to NULL if you do not need this information. |
Return Value
| Type |
Description |
|---|---|
| int | On success, this function returns a non-zero value. On failure, this function returns 0. To get extended error information, call imaqGetLastError(). |