imgSessionFitROI
Usage
rval imgSessionFitROI(SESSION_ID boardid, IMG_ROI_FIT_MODE fitMode, uInt32 top, uInt32 left, uInt32 height, uInt32 width, uInt32* fittedTop, uInt32* fittedLeft, uInt32* fittedHeight, uInt32* fittedWidth);
Purpose
Evaluates the region of interest (ROI) you specify, and returns valid left, top, height, and width values. Returns an ROI that NI-IMAQ is guaranteed to be able to acquire and that best accommodates the ROI you specify.
Parameters
| Name | Type | Direction |
| sid | SESSION_ID | input |
| fitMode | IMG_ROI_FIT_MODE | input |
| top | uInt32 | input |
| left | uInt32 | input |
| height | uInt32 | input |
| width | uInt32 | input |
| fittedTop | uInt32* | output |
| fittedLeft | uInt32* | output |
| fittedHeight | uInt32* | output |
| fittedWidth | uInt32* | output |
Parameter Discussion
sid: valid SESSION_ID.
fitMode: next smallest or next largest acquirable ROI. The following are valid values for this parameter:
| IMG_ROI_FIT_LARGER |
| IMG_ROI_FIT_SMALLER |
top: top coordinate to fit.
left: left coordinate to fit.
height: height coordinate to fit.
width: width coordinate to fit.
fittedTop: fitted ROI top coordinate.
fittedLeft: fitted ROI left coordinate.
fittedHeight: fitted ROI height coordinate.
fittedWidth: fitted ROI width coordinate.
Return Value
This function returns 0 on success. On failure, this function returns an error code. For information about the error code, call imgShowError.