overpaint_grayoverpaint_grayOverpaintGrayOverpaintGrayoverpaint_gray (Operator)

Name

overpaint_grayoverpaint_grayOverpaintGrayOverpaintGrayoverpaint_gray — Overpaint the gray values of an image.

Signature

Description

overpaint_grayoverpaint_grayOverpaintGrayOverpaintGrayoverpaint_gray copies the gray values of the image given in ImageSourceImageSourceImageSourceimageSourceimage_source into the image in ImageDestinationImageDestinationImageDestinationimageDestinationimage_destination. Only the gray values of the domain of ImageSourceImageSourceImageSourceimageSourceimage_source are copied (see reduce_domainreduce_domainReduceDomainReduceDomainreduce_domain).

If you do not want to modify ImageDestinationImageDestinationImageDestinationimageDestinationimage_destination itself, you can use the operator paint_graypaint_grayPaintGrayPaintGraypaint_gray, which returns the result in a newly created image.

Attention

overpaint_grayoverpaint_grayOverpaintGrayOverpaintGrayoverpaint_gray modifies the content of an already existing image (ImageDestinationImageDestinationImageDestinationimageDestinationimage_destination). Besides, even other image objects may be affected: For example, if you created ImageDestinationImageDestinationImageDestinationimageDestinationimage_destination via copy_objcopy_objCopyObjCopyObjcopy_obj from another image object (or vice versa), overpaint_grayoverpaint_grayOverpaintGrayOverpaintGrayoverpaint_gray will also modify the image matrix of this other image object. Therefore, overpaint_grayoverpaint_grayOverpaintGrayOverpaintGrayoverpaint_gray should only be used to overpaint newly created image objects. Typical operators for this task are, e.g., gen_image_constgen_image_constGenImageConstGenImageConstgen_image_const (creates a new image with a specified size), gen_image_protogen_image_protoGenImageProtoGenImageProtogen_image_proto (creates an image with the size of a specified prototype image) or copy_imagecopy_imageCopyImageCopyImagecopy_image (creates an image as the copy of a specified image).

Execution Information

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

This operator modifies the state of the following input parameter:

• ImageDestinationImageDestinationImageDestinationimageDestinationimage_destination

During execution of this operator, access to the value of this parameter must be synchronized if it is used across multiple threads.

Parameters

* Copy a circular part of the image 'monkey' into a new image (New1):

read_image(Image,'monkey')
gen_circle(Circle,200,200,150)
reduce_domain(Image,Circle,Mask)
* New image with black (0) background
gen_image_proto(Image,New1,0.0)
* Copy a part of the image 'monkey' into New1
overpaint_gray(New1,Mask)

/* Copy a circular part of the image 'monkey' into a new image (New1): */

read_image(&Image,"monkey");
gen_circle(&Circle,200.0,200.0,150.0);
reduce_domain(Image,Circle,&Mask);
/* New image with black (0) background */
gen_image_proto(Image,&New1,0.0);
/* Copy a part of the image 'monkey' into New1 */
overpaint_gray(New1,Mask);

* Copy a circular part of the image 'monkey' into a new image (New1):

read_image(Image,'monkey')
gen_circle(Circle,200,200,150)
reduce_domain(Image,Circle,Mask)
* New image with black (0) background
gen_image_proto(Image,New1,0.0)
* Copy a part of the image 'monkey' into New1
overpaint_gray(New1,Mask)

* Copy a circular part of the image 'monkey' into a new image (New1):

read_image(Image,'monkey')
gen_circle(Circle,200,200,150)
reduce_domain(Image,Circle,Mask)
* New image with black (0) background
gen_image_proto(Image,New1,0.0)
* Copy a part of the image 'monkey' into New1
overpaint_gray(New1,Mask)

Result

overpaint_grayoverpaint_grayOverpaintGrayOverpaintGrayoverpaint_gray returns 2 ( H_MSG_TRUE) if all parameters are correct. If necessary, an exception is raised.

Possible Predecessors

read_imageread_imageReadImageReadImageread_image, gen_image_constgen_image_constGenImageConstGenImageConstgen_image_const, gen_image_protogen_image_protoGenImageProtoGenImageProtogen_image_proto

Alternatives

get_image_pointer1get_image_pointer1GetImagePointer1GetImagePointer1get_image_pointer1, paint_graypaint_grayPaintGrayPaintGraypaint_gray, set_grayvalset_grayvalSetGrayvalSetGrayvalset_grayval, copy_imagecopy_imageCopyImageCopyImagecopy_image

See also

paint_regionpaint_regionPaintRegionPaintRegionpaint_region, overpaint_regionoverpaint_regionOverpaintRegionOverpaintRegionoverpaint_region

Module

Foundation