René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Image interpolation wrong for pixel values exceeding vmax ","articleBody":"\u003c!--To help us understand and resolve your issue, please fill out the form to the best of your ability.--\u003e\r\n\u003c!--You can feel free to delete the sections that do not apply.--\u003e\r\n\r\n### Bug report\r\n\r\n**Bug summary**\r\n\r\nWith imshow(), image interpolation gives wrong results near pixels with values exceeding vmax. A large rectangular region (given by the interpolation kernel size) is filled with color corresponding to maximum value.\r\n\r\n\u003c!--A short 1-2 sentences that succinctly describes the bug--\u003e\r\n\r\n**Code for reproduction**\r\n\r\n\u003c!--A minimum code snippet required to reproduce the bug, also minimizing the number of dependencies required--\u003e\r\n\r\n```python\r\nt = zeros((50, 50))\r\nt[10, 10] = 1\r\nt[10, 20] = 2\r\nimshow(t, vmin=0, vmax=1, interpolation='lanczos')\r\n```\r\n[see gist](https://gist.github.com/geggo/b40da1b69b2a1cd37f8a8454423d3495)\r\n\r\n**Actual outcome**\r\n\r\n\u003cimg width=\"253\" alt=\"download 2\" src=\"https://cloud.githubusercontent.com/assets/968371/26103864/b0f02152-3a3b-11e7-8ba2-ba793a9a1be9.png\"\u003e\r\n\r\n\u003c!--The output produced by the above code, which may be a screenshot, console output, etc.--\u003e\r\n\r\n\r\n**Expected outcome**\r\n\r\n\u003c!--A description of the expected outcome from the code snippet--\u003e\r\n\u003c!--If this used to work in an earlier version of Matplotlib, please note the version it used to work on--\u003e\r\n\r\nOk with matplotlib 2.0.0\r\n\r\n\u003cimg width=\"253\" alt=\"download\" src=\"https://cloud.githubusercontent.com/assets/968371/26103723/2271b1de-3a3b-11e7-9497-501d50a59101.png\"\u003e\r\n\r\n\r\n**Matplotlib version**\r\n\u003c!--Please specify your platform and versions of the relevant libraries you are using:--\u003e\r\n  * Operating System: macOS\r\n  * Matplotlib Version: 2.0.1, 2.0.2\r\n  * Python Version: 2.7\r\n  * Jupyter Version (if applicable):\r\n  * Other Libraries: \r\n\r\n\u003c!--Please tell us how you installed matplotlib and python e.g., from source, pip, conda--\u003e\r\n\u003c!--If you installed from conda, please specify which channel you used if not the default--\u003e\r\n\r\nmatplotlib installed via conda-forge\r\n","author":{"url":"https://github.com/geggo","@type":"Person","name":"geggo"},"datePublished":"2017-05-16T11:31:06.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":16},"url":"https://github.com/8631/matplotlib/issues/8631"}