| Operators |
gen_image1_rect — Create an image with a rectangular domain from a pointer on the pixels (with storage management).
gen_image1_rect( : Image : PixelPointer, Width, Height, VerticalPitch, HorizontalBitPitch, BitsPerPixel, DoCopy, ClearProc : )
The operator gen_image1_rect creates an image of size (VerticalPitch/(HorizontalBitPitch / 8)) * Height. The pixels pointed to by PixelPointer are stored line by line. Note that how to pass a pointer value depends on the used operator signature and programming environment. Make sure to pass the actual memory address where the image data is stored, not the address of a pointer variable. Care must be taken not to truncate 64-bit pointers on 64-bit architectures.
VerticalPitch determines the distance (in bytes) between pixel m in row n and pixel m in row n+1 inside of memory. All rows of the 'input image' have the same vertical pitch. The width of the output image is VerticalPitch / (HorizontalBitPitch / 8), its height is Height. The domain of the output image Image is a rectangle of the size Width * Height. The parameter HorizontalBitPitch is the horizontal distance (in bits) between two neighboring pixels. BitsPerPixel is the number of used bits per pixel.
If DoCopy is set 'true', the image data pointed to by PixelPointer is copied and memory for the new image is newly allocated by HALCON. Else the image data is not duplicated and the memory space that PixelPointer points to must be released when deleting the object Image. This is done by the procedure ClearProc provided by the caller. This procedure must have the following signature
void ClearProc(void* ptr);
and will be called using __cdecl calling convention when deleting Image. If the memory shall not be released (in the case of frame grabbers or static memory) a procedure ”without trunk” or the NULL-pointer can be passed. Analogously to the parameter PixelPointer the pointer has to be passed to the procedure depending on the used operator signature and programming environment. If DoCopy is 'true' then ClearProc is irrelevant. The operator gen_image1_rect is symmetrical to get_image_pointer1_rect.
Created HALCON image.
Pointer to the first pixel.
Width of the image.
Default value: 512
Suggested values: 128, 256, 512, 1024
Typical range of values: 1 ≤ Width ≤ 512 (lin)
Minimum increment: 1
Recommended increment: 10
Restriction: Width >= 1
Height of the image.
Default value: 512
Suggested values: 128, 256, 512, 1024
Typical range of values: 1 ≤ Height ≤ 512 (lin)
Minimum increment: 1
Recommended increment: 10
Restriction: Height >= 1
Distance (in bytes) between pixel m in row n and pixel m in row n+1 of the 'input image'.
Restriction: VerticalPitch >= Width * HorizontalBitPitch / 8
Distance between two neighboring pixels in bits .
Default value: 8
List of values: 8, 16, 32
Number of used bits per pixel.
Default value: 8
List of values: 8, 9, 10, 11, 12, 13, 14, 15, 16, 32
Restriction: BitsPerPixel <= HorizontalBitPitch
Copy image data.
Default value: 'false'
Suggested values: 'true', 'false'
Pointer to the procedure releasing the memory of the image when deleting the object.
Default value: 0
void NewImage(Hobject *new)
{
unsigned char *image;
int r,c;
image = malloc(640*480);
for (r=0; r<480; r++)
for (c=0; c<640; c++)
image[r*640+c] = c % 255;
gen_image1_rect(new,(Hlong)image,400,480,640,8,8,'false',(long)free);
}
The operator gen_image1_rect returns the value 2 (H_MSG_TRUE) if the parameter values are correct. Otherwise an exception is raised.
gen_image1, gen_image1_extern, gen_image_const
Foundation
| Operators |