Re: [Matplotlib-users] display pixels values on the backends
>> Hi, >> >> I have already asked about that but I'm back once again :) >> >> The way I use matplotlib may be a corner case: >> I'm often looking at large (4k x 4k) images and I do want to see the >> pixels values moving the mouse over the display. >> imshow does a great job but all the backend only display "x= y=". >> I would love to see "x= y= Z=" (or "value="...call it the way you want ;)) >> >> What is the best way to do that? >> imshow is great because there is nothing to connect to see x and y >> values on the backend. >> I need to code something as simple as imshow to get also the pixel values. >> > > The easiest way I can think of is to override Axes.format_coord > method. A pseudo code might look like below > > def report_pixel(x, y): ># get the pixel value >v = get_pixel_value_of_your_image(x,y) > >return "x=%f y=%f value=%f" % (x, y, v) > > ax = gca() > ax.format_coord = report_pixel > > The code will become more complicated if you want to support multiple images. > This solution is far from elegant, but maybe the easiest one. > > -JJ > > >> Is there really on way to get that as a new option in imshow? at least >> in one of the backend (as a starting point) >> >> Best Regards, >> Xavier >> Thanks it does work but I still wonder why it is not an option in imshow Xavier -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] display pixels values on the backends
On Mon, Aug 24, 2009 at 1:48 PM, Xavier Gnata wrote: > Hi, > > I have already asked about that but I'm back once again :) > > The way I use matplotlib may be a corner case: > I'm often looking at large (4k x 4k) images and I do want to see the > pixels values moving the mouse over the display. > imshow does a great job but all the backend only display "x= y=". > I would love to see "x= y= Z=" (or "value="...call it the way you want ;)) > > What is the best way to do that? > imshow is great because there is nothing to connect to see x and y > values on the backend. > I need to code something as simple as imshow to get also the pixel values. The easiest way I can think of is to override Axes.format_coord method. A pseudo code might look like below def report_pixel(x, y): # get the pixel value v = get_pixel_value_of_your_image(x,y) return "x=%f y=%f value=%f" % (x, y, v) ax = gca() ax.format_coord = report_pixel The code will become more complicated if you want to support multiple images. This solution is far from elegant, but maybe the easiest one. -JJ > > Is there really on way to get that as a new option in imshow? at least > in one of the backend (as a starting point) > > Best Regards, > Xavier > > -- > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day > trial. Simplify your report design, integration and deployment - and focus on > what you do best, core application coding. Discover what's new with > Crystal Reports now. http://p.sf.net/sfu/bobj-july > ___ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] display pixels values on the backends
Hi, I have already asked about that but I'm back once again :) The way I use matplotlib may be a corner case: I'm often looking at large (4k x 4k) images and I do want to see the pixels values moving the mouse over the display. imshow does a great job but all the backend only display "x= y=". I would love to see "x= y= Z=" (or "value="...call it the way you want ;)) What is the best way to do that? imshow is great because there is nothing to connect to see x and y values on the backend. I need to code something as simple as imshow to get also the pixel values. Is there really on way to get that as a new option in imshow? at least in one of the backend (as a starting point) Best Regards, Xavier -- Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
