PK M - Peak search - Maximum

PURPOSE

Searches for maximum peak in an image. Handles plateaus correctly.

SEE ALSO

PK	[Peak search]
PK 3	[Peak search - 3D]
PK C	[Peak search - Center of gravity]
PK D	[Peak search - output to Document file]

USAGE

.OPERATION: PK M X11,X12,X13,X14, X15,X16,X17

[The first four optional output parameters (in this example X11,X12,X13 & X14) specify registers that are to receive the coordinates relative to the image (X11 & X12), and relative to the origin (X13 & 14), of the location of the pixel having the maximium value in the image. If there is more than one such pixel the coordinates are the center of gravity of the pixels having the maximum value. The 5th register (X15) gets the value of the maximum. The sixth register (X16) gets the number of maximal pixels. If there is only a single maximal pixel the coordinates are adjusted using the same method as 'PK' to give sub-pixel accuracy. The seventh register (X17) gets the maximal radius of a bounding box containing all maximal pixels. (This radius is zero if there is only a single maximal pixel.)

.INPUT FILE: PIC001
[Enter the name of the image file.]

.ENTER ORIGIN COORDINATES OR <CR> FOR CENTER: 1,1
[Enter the new origin coordinates.]

[In the above example, the computer will find the highest peak. Its position will be printed in the RESULTS file. In addition, the peak position and value will be put into the temporary registers if output parameters X11-X17 are specified. The registers can be used as input to a subsequent shift ('SH') operation.

NOTES

1. This routine finds the "maximum" location when an image has plateaus. 'PK' will not do this.

SUBROUTINES

SPEAKM

CALLER

UTIL1