ppmrelief(1) General Commands Manual ppmrelief(1)NAME
ppmrelief - run a Laplacian relief filter on a portable pixmap
Reads a portable pixmap as input. Does a Laplacian relief filter, and writes a portable pixmap as output.
The Laplacian relief filter is described in "Beyond Photography" by Holzmann, equation 3.19. It's a sort of edge-detection.
SEE ALSO pgmbentley(1), pgmoil(1), ppm(5)AUTHOR
Copyright (C) 1990 by Wilson Bent (email@example.com)
11 January 1991 ppmrelief(1)
Check Out this Related Man Page
pamoil(1) General Commands Manual pamoil(1)NAME
pamoil - turn a PAM image into an oil painting
pamoil [-n N] [pamfile]
Reads a Netpbm image as input. Does an "oil transfer", and writes the same type of Netpbm image as output.
The oil transfer is described in "Beyond Photography" by Holzmann, chapter 4, photo 7. It's a sort of localized smearing.
The smearing works like this: First, assume a grayscale image. For each pixel in the image, pamoil looks at a square neighborhood around
it. pamoil determines what is the most common pixel intensity in the neighborhood, and puts a pixel of that intensity into the output in
the same position as the input pixel.
For color images, or any arbitrary multi-channel image, pamoil computes each channel (e.g. red, green, and blue) separately the same way as
the grayscale case above.
At the edges of the image, where the regular neighborhood would run off the edge of the image, pamoil uses a clipped neighborhood.
OPTIONS -n size
This is the size of the neighborhood used in the smearing. The neighborhood is this many pixels in all four directions.
The default is 3.
SEE ALSO pgmbentley(1), ppmrelief(1), ppm(5)AUTHOR
Based on pgmoil Copyright (C) 1990 by Wilson Bent (firstname.lastname@example.org)
Modified to ppm by Chris Sheppard, June 25, 2001
Modified to pnm, using pam functions, by Bryan Henderson June 28, 2001.
25 June 2001 pamoil(1)
I need help!Many Thanks!
Now,I try to manage the shared memory inter-process .
Inevitably,I have to deal with the synchronous.
I know the pthread_rwlock in posix,and I compile ,then run successfully in Red Hat Enterprise 4.
I have a doubt about whether the Posix supports the system such as... (1 Reply)
I'm a user and a programmer of UNIX based systems (mainly FreeBSD and Linux).
I have never programmed or tried to fully understand the kernel layer. I haven't a special propouse for learning it, but I'd like to. Can anyone suggest me books, documentation or examples that may help me... (2 Replies)
I hope everybody is fine. I have been studing operating system concepts at college, and I find this subject very interesting. I've decided that I must go into this field no matter what, hopefully someday I would design my own operating system. I have two choices infront of me, studying... (9 Replies)
I am thinking of developing an app' for Android mobile devices...
Two questions here:-
1) Does anyone _develop_ for the Android _mobile_ platform?
If so do you use OSX 10.7.5 or greater as your _development_platform_?
2) I know ********* is gonna say that the Android terminal/shell is... (13 Replies)
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.
Ok onto business, my questions are-:
Was/Is UNIX ever an open source operating system ?
If UNIX was... (21 Replies)
I hope you are fine,
I'd like study Os I tried a book like Silberschatz it's a good book but like
other books it talks about the concepts abstractly and that's due to it try
to encompass many concepts from many operating systems in GENERAL.
i am not too much comfortable from these... (20 Replies)
I'm new on the site and do not write very well in English, I am now using osx platform and was attracted to her. For several searches on random websites for Unix content yours was the best and most interesting, I registered and already visualized some very interesting content. But I wonder where... (3 Replies)
I am new to this forum and this is my very first post, one i think i will look back at many years from now and have nothing to regret about.
This is simply because i recently installed Linux (Ubuntu) on my system and downloaded a book titled, The Unix Programming Environment. I... (7 Replies)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)