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[Octave-bug-tracker] [bug #55486] imread imports PDF(paper) images with
From: |
anonymous |
Subject: |
[Octave-bug-tracker] [bug #55486] imread imports PDF(paper) images with low 75dpi(screen) resolution |
Date: |
Tue, 15 Jan 2019 23:48:35 -0500 (EST) |
User-agent: |
Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:64.0) Gecko/20100101 Firefox/64.0 |
URL:
<https://savannah.gnu.org/bugs/?55486>
Summary: imread imports PDF(paper) images with low
75dpi(screen) resolution
Project: GNU Octave
Submitted by: None
Submitted on: Wed 16 Jan 2019 04:48:33 AM UTC
Category: Octave Function
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Inaccurate Result
Status: None
Assigned to: None
Originator Name: Hale
Originator Email: address@hidden
Open/Closed: Open
Discussion Lock: Any
Release: 4.4.1
Operating System: Microsoft Windows
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Details:
imread() does not have an option for setting vector data interpreter
resolution.
One would expect a standard (traditional) resolution to be used depending on
the source data type.
I.e. .svg is a web/screen vector data, while .PS, .PDF are formats purely for
printable data.
Classic (but outdated) screen resolution is 75dpi.
And for printable data it was always between 300dpi for color, and 400-600 dpi
for B/W.
But for some weird and insane reason imread() (__magick_read__ actually) uses
75 dpi for printable PDF sources.
This often makes imported data unusable.
And there is no documentation on __magick_read__ for hacking __imread__() .m
code (if it is possible at all)
_______________________________________________________
Reply to this item at:
<https://savannah.gnu.org/bugs/?55486>
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- [Octave-bug-tracker] [bug #55486] imread imports PDF(paper) images with low 75dpi(screen) resolution,
anonymous <=
- [Octave-bug-tracker] [bug #55486] imread imports PDF(paper) images with low 75dpi(screen) resolution, Pantxo Diribarne, 2019/01/16
- [Octave-bug-tracker] [bug #55486] imread imports PDF(paper) images with low 75dpi(screen) resolution, анонимный, 2019/01/16
- [Octave-bug-tracker] [bug #55486] imread imports PDF(paper) images with low 75dpi(screen) resolution, Pantxo Diribarne, 2019/01/16
- [Octave-bug-tracker] [bug #55486] imread imports PDF(paper) images with low 75dpi(screen) resolution, анонимный, 2019/01/16
- [Octave-bug-tracker] [bug #55486] imread imports PDF(paper) images with low 75dpi(screen) resolution, Pantxo Diribarne, 2019/01/16
- [Octave-bug-tracker] [bug #55486] imread imports PDF(paper) images with low 75dpi(screen) resolution, Pantxo Diribarne, 2019/01/16
- [Octave-bug-tracker] [bug #55486] imread imports PDF(paper) images with low 75dpi(screen) resolution, анонимный, 2019/01/16
- [Octave-bug-tracker] [bug #55486] imread imports PDF(paper) images with low 75dpi(screen) resolution, Philip Nienhuis, 2019/01/16
- [Octave-bug-tracker] [bug #55486] imread imports PDF(paper) images with low 75dpi(screen) resolution, анонимный, 2019/01/18
- [Octave-bug-tracker] [bug #55486] imread imports PDF(paper) images with low 75dpi(screen) resolution, Philip Nienhuis, 2019/01/18