This function converts a 16-bit grayscale image to an 8-bit grayscale image using the same function as MED_display_contrast_auto() except that this function permanently alters the pixel values.
Declaration:
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AT_ERRCOUNT ACCUAPI MED_IP_contrast_auto( const HIGEAR hIGear, const LPAT_RECT lpRect, const DOUBLE rescale_slope, const DOUBLE rescale_intercept, const LONG lReserved_option, LPLONG lpWindow_center, LPLONG lpWindow_width); |
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Arguments:
| hIGear | The HIGEAR handle to the image to convert. |
| lpRect | Use this AT_RECT structure to specify the rectangular portion of the image for which to optimize the contrast on; set to NULL for the whole image. Please see the ImageGear User's Manual if you are unfamiliar with this structure. |
| rescale_slope | Set to the value of the Data Element, Rescale Slope (0028,1053). You can use MED_DCM_DS_Rescale_get() to obtain this value. If this Data Element is not present in the Data Set, please set this value to 1.0. |
| rescale_intercept | Set to the value of the Data Element, Rescale Intercept (0028,1054). You can use MED_DCM_DS_Rescale_get() to obtain this value. If this Data Element is not present in the Data Set, please set this value to 0.0. |
| lReserved_option | Reserved for future use; please set to 0 for now. |
| lpWindow_center | A far pointer that returns a LONG for the Window Center; set to NULL if you don't need this information. |
| lpWindow_width | A far pointer that returns a LONG for the Window Width; set to NULL if you don't need this information. |
| lpSigned | A far pointer that returns a BOOL value indicating whether the value is signed or not. |
Supported Raster Image Formats:
Grayscale – 9…16 bpp.
Return Value:
Returns the number of ImageGear errors that occurred during the function call.
See Also
MED_IP_reduce_depth_with_downshift()