PdfHandler should use -sharpen for creating JPG thumbnail previews
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	Arthur2e5
	Aug 25 2020, 10:18 PM

Description

PdfHandler currently performs the ImageMagick call on its own using a very simple command line. As a result, for thumbnails of documents like this one, the output is blurrier than ideal for textual pdfs.

A nice start would be taking what T8193 does (code here) and adding a -sharpen when JPEG is requested.

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Mentioned Here: T38597: Switch from jpeg to png for thumbnailing pdfs
T8193: sharpening (at least as option) and higher thumb-quality

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Arthur2e5 created this task.Aug 25 2020, 10:18 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptAug 25 2020, 10:18 PM

Arthur2e5 updated the task description. (Show Details)Aug 25 2020, 10:19 PM

Arthur2e5 updated the task description. (Show Details)

Arthur2e5 updated the task description. (Show Details)Aug 25 2020, 10:32 PM

Reedy updated the task description. (Show Details)Aug 25 2020, 10:59 PM

There is already a task about using PNG as output of PdfHandler T38597, so is this one specifically about -sharpen?

@Arthur2e5: Could you please answer the last comment? Thanks in advance!

Yes, make this task about -sharpen on JPEG then. Editing.

Arthur2e5 updated the task description. (Show Details)Nov 14 2020, 2:50 AM

Aklapper renamed this task from PdfHandler can use some sharpening on the preview to PdfHandler should use -sharpen for creating JPG thumbnail previews.Nov 14 2020, 8:09 AM

PdfHandler should use -sharpen for creating JPG thumbnail previewsOpen, Needs TriagePublicActions

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PdfHandler should use -sharpen for creating JPG thumbnail previews
Open, Needs TriagePublic
Actions