python - Pixelated fonts when plot is saved as jpeg -

-

when save matplotlib figure jpeg tick fonts pixelated. i'm not sure going on or if there hack fix this. have insight?

%matplotlib nbagg  import matplotlib.pyplot plt import numpy np  x = np.linspace(-1.2,1.2,1000,endpoint=true) y = np.copy(x)  x,y = np.meshgrid(x,y) z   = -x**2 + y**2 - y**3  fig = plt.figure()  ax  = fig.add_subplot(111)  cs = plt.contour(x,y,z, [0,-0.1,0.1], colors=['black','blue', 'gray']) plt.clabel(cs, fontsize=14, inline=1, fmt='%1.1f', manual=[(-0.15,0), (-0.4,0), (0.25,0.5)])  plt.savefig('plot.png', format='png') plt.savefig('plot.jpg', format='jpg') plt.savefig('plot.tiff', format='tiff')

here plot.png:

enter image description here

here plot.jpg:

enter image description here

here plot.tiff:

enter image description here

i believe related previous question had: anti-aliased fonts in animations

as noted above, situation appears dependent on backend used. can avoid issue using:

import matplotlib matplotlib.use('webagg')

as opposed to:

%matplotlib nbagg

i believe issue has pil trying save jpeg of figure transparency. if insist on using nbagg, appears if set:

matplotlib.rcparams['nbagg.transparent'] = false

your jpeg image fonts won't pixelated , identical png , tiff files shown in question. unfortunately using rcparams:

matplotlib.rcparams['savefig.transparent'] = false

is not sufficient. appears 'savefig.transparent' rcparam control transparency of plot inside figure , 'nbagg.transparent' control transparency outside of figure (ie: axis, ticks, titles, etc..). there easy work ensuring backend forces transparency = false when saving file formats don't support transparency.

some of other backends may not support transparency why appears fix problem when change backends.

i report github bug.


Comments

Post a Comment

Popular posts from this blog

How to show in django cms breadcrumbs full path? -

-
need advice - how show in breadcrumbs whole path article or page? i've got code: {% ance in ancestors %} <li> {% if not forloop.last %} <a href="{{ ance.get_absolute_url }}">{{ ance.get_menu_title }}</a> {% else %} <span class="active">{{ ance.get_menu_title }}</span> {% endif %} </li> {% endfor %} but shows "home" , current page. how modify show whole path in breadcrumbs? i've found in file menu_tags.py code calls ancestors. @ least there class showbreadcrumbs: class showbreadcrumb(inclusiontag): """ shows breadcrumb node has same url current request - start level: after level should breadcrumb start? 0=home - template: template used render breadcrumb """ name = 'show_breadcrumb' template = 'menu/dummy.html' options = options( argument('start_level', default=0, require...
Read more

php - Invalid Cofiguration - yii\base\InvalidConfigException - Yii2 -

-
Image
i've installed yii2-user module/dektrium yii2-app-basic application command composer require "dektrium/yii2-user:0.9.*@dev" config/console.php return [ . . 'modules' => [ 'gii' => 'yii\gii\module', 'user' => [ 'class' => 'dektrium\user\module', ], ], . . ] config/web.php 'components' => [ . . /* 'user' => [ 'identityclass' => 'app\models\user', 'enableautologin' => true, ], */ 'modules' => [ 'user' => [ 'class' => 'dektrium\user\module', ], ], . . ] after that, run command $ php yii migrate/up --migrationpath=@vendor/dektrium/yii2-user/migrations updating database schema . but, when run http://localhost/mylawsuit/yii/web/index.php?r=u...
Read more

ruby on rails - npm error: tunneling socket could not be established, cause=connect ETIMEDOUT -

-
i have app uses rails framework , implements angularjs part of front end. i have pushed heroku , have heroku toolbelt installed, when try migrate db using "heroku run rake db:migrate" receive following error(s): installing core plugins heroku-cli-addons, heroku-apps, heroku-fork, heroku-git, heroku-local, heroku-run, heroku-status... error installing package. try running again gode_debug=info see more output. ! `run` not heroku command. ! perhaps meant `-h`, `2fa`, `auth`, `join`, `open`, `orgs`, `pg`, `ps` or `rake`. ! see `heroku help` list of available commands. i run command "gode_debug=info heroku run rake db:migrate" , receive error: npm err! darwin 14.5.0 npm err! argv "/users/christopher_pelnar/.heroku/node-v4.2.1-darwin-x64/bin/node" "/users/christopher_pelnar/.heroku/node-v4.2.1-darwin-x64/lib/node_modules/npm/cli.js" "install" "heroku-cli-addons" "heroku-apps" "heroku-fork...
Read more