gen_image_constgen_image_constGenImageConstGenImageConst (Operator)

Name

gen_image_constgen_image_constGenImageConstGenImageConst — Create an image with constant gray value.

Signature

gen_image_const( : Image : Type, Width, Height : )

The operator gen_image_constgen_image_constGenImageConstGenImageConstGenImageConst creates an image of the indicated size. The width and height of the image are determined by WidthWidthWidthWidthwidth and HeightHeightHeightHeightheight. HALCON supports the following image types:

'byte'

1 byte per pixel, unsigned

Value range: (0..255)

'int1'

1 byte per pixel, signed

Value range: (-128..127)

'uint2'

2 bytes per pixel, unsigned

Value range: (0..65535)

'int2'

2 bytes per pixel, signed

Value range: (-32768..32767)

'int4'

4 bytes per pixel, signed

Value range: (-2147483648..2147483647)

'int8'

8 bytes per pixel, signed (only available on 64 bit systems)

Value range: (-9223372036854775808..9223372036854775807)

'real'

4 bytes per pixel, floating point

Value range: (-3.4e38..3.4e38)

Precision: 6 significant decimal digits

'complex'

Two matrices of type 'real'"real""real""real""real"

'vector_field_relative'

Two matrices of type 'real'"real""real""real""real"

Interpretation: Vectors

'vector_field_absolute'

Two matrices of type 'real'"real""real""real""real"

Interpretation: Absolute coordinates

'direction'

1 byte per pixel, unsigned

Value range: (0..179)

Interpretation: Angle divided by two

Attention: The values 180..254 are automatically set to the value 255, which is interpreted as undefined angle.

'cyclic'

1 byte per pixel, unsigned, cyclic arithmetics

Value range: (0..255)

With the operator set_system('init_new_image',<'true'/'false'>)set_system("init_new_image",<"true"/"false">)SetSystem("init_new_image",<"true"/"false">)SetSystem("init_new_image",<"true"/"false">)SetSystem("init_new_image",<"true"/"false">), it can be controlled whether the created image is initialized with 0 or not.

Execution Information

Multithreading type: reentrant (runs in parallel with non-exclusive operators).
Multithreading scope: global (may be called from any thread).
Processed without parallelization.

Parameters

ImageImageImageImageimage (output_object) image → object (byte / direction / cyclic / int1 / int2 / uint2 / int4 / int8 / real / complex / vector_field)

Created image with new image matrix.

TypeTypeTypeTypetype (input_control) string → (string)

Pixel type.

Default value: 'byte' "byte" "byte" "byte" "byte"

List of values: 'byte'"byte""byte""byte""byte", 'complex'"complex""complex""complex""complex", 'cyclic'"cyclic""cyclic""cyclic""cyclic", 'direction'"direction""direction""direction""direction", 'int1'"int1""int1""int1""int1", 'int2'"int2""int2""int2""int2", 'int4'"int4""int4""int4""int4", 'int8'"int8""int8""int8""int8", 'real'"real""real""real""real", 'uint2'"uint2""uint2""uint2""uint2", 'vector_field_absolute'"vector_field_absolute""vector_field_absolute""vector_field_absolute""vector_field_absolute", 'vector_field_relative'"vector_field_relative""vector_field_relative""vector_field_relative""vector_field_relative"

WidthWidthWidthWidthwidth (input_control) extent.x → (integer)

Width of image.

Default value: 512

Suggested values: 128, 256, 512, 1024

Typical range of values: 1 ≤ Width Width Width Width width ≤ 512 (lin)

Minimum increment: 1

Recommended increment: 10

Restriction: Width >= 1

HeightHeightHeightHeightheight (input_control) extent.y → (integer)

Height of image.

Default value: 512

Suggested values: 128, 256, 512, 1024

Typical range of values: 1 ≤ Height Height Height Height height ≤ 512 (lin)

Minimum increment: 1

Recommended increment: 10

Restriction: Height >= 1

Example (C)

gen_image_const(&New,"byte",width,height);
get_image_pointer1(New,(Hlong*)&pointer,type,&width,&height);
for (row=0; row<height-1; row++)
{
  for (col=0; col<width-1; col++)
  {
    pointer[row*width+col] = (row + col) % 256;
  }
}

Result

If the parameter values are correct, the operator gen_image_constgen_image_constGenImageConstGenImageConstGenImageConst returns the value 2 (H_MSG_TRUE). Otherwise an exception is raised.