PNG ten times as big as JPG
Bug #498438 reported by
Michaël Van Dorpe
This bug report was converted into a question: question #94651: PNG ten times as big as JPG.
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| Simple Scan |
Invalid
|
Undecided
|
Unassigned | ||
Bug Description
When scanning a picture and saving, simple-scan defaults to jpegs.
However, in the file picker dialog, one can also enter for example "foo.png" as filename.
The result with my scanner is that the resuling file is about 10MB, ie about 10 times as big as saving to JPG.
I don't know much about these file types, and what type I should use, and what file sizes to expect, but this looks odd to me.
Revision history for this message
| Robert Ancell (robert-ancell) wrote | #1 |
| Changed in simple-scan: | |
| status: | New → Invalid |
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This is completely expected - JPEG achieves small sizes by throwing away data that you wouldn't notice (like an MP3 file). In contrast PNG contains all the image data, the noise from the sensors, the grain of the paper, ... - this is a lot of data!
As you wont notice the missing data it defaults to JPEG (as does your camera).
If you want the raw scan data then you would save as PNG (this is like a photographer using the RAW format from their camera).