NEW! PaintShop Pro 2019

Loss of metada in PSP vX4

Corel Paint Shop Pro

Moderator: Kathy_9

Re: Loss of metada in PSP vX4

Postby ToreB » Thu May 02, 2019 9:00 am

Some searching revealed that the png format specification per Version 1.5.0 of July 2017, has added an EXIF chunk.
Specifications here:
http://ftp-osl.osuosl.org/pub/libpng/do ... tml#C.eXIf

Hope PSP very soon will incorporate this.
ToreB
 
Posts: 15
Joined: Fri Apr 12, 2019 12:59 pm
operating_system: Windows 10
System_Drive: C
32bit or 64bit: 64 Bit

Re: Loss of metada in PSP vX4

Postby LeviFiction » Fri May 03, 2019 12:20 am

That is an extension list, still not part of the core spec.
Also, the sample you provided does not include the eXIf chunk. Just the iTXt chunk. Which does contain XMP data. The XMP data contains EXIF tags in the XML

And, although you didn't need me to, i have confirmed that PSP purges that field when it saves the png. In fact it purged several images from the PNG. Here was your PNG format before and after PSP.
Before:
iTXt - text
iCCP - ICC Profile
pHYs - physical size
10 IDAT - 10 image data chunks

After:
tIME - last time edited
pHYs - physical size
gAMA - Gama correction
IDAT - 1 image data chunk

Now that I have confirmed your PNG's file format do you want a script that can backup this data and restore it? Or would rather not bother?
LeviFiction
Advisor
 
Posts: 5397
Joined: Thu Oct 02, 2008 1:07 pm
Location: USA
operating_system: Windows 10
System_Drive: C
32bit or 64bit: 64 Bit
Corel programs: PSP: 8, 9, X, XI, X2, X8,X9, 2018, 2019

Re: Loss of metada in PSP vX4

Postby ToreB » Fri May 03, 2019 1:36 am

I just referred to a thread on the subject:
https://stackoverflow.com/questions/954 ... a-like-jpg
I am not a programmer and this is a bit technical for me. I just want my photo edit program not to throw away data. PSP apparantly is not for me, and sadly I have paid good money for a (for me) useless product.
I had the idea that this forum could help me report what I thought was a bug. Apparently this is not a bug but just a badly executed program.
No need for you to waist your valuable time on me, i'll stick with Affinity Photo.
ToreB
 
Posts: 15
Joined: Fri Apr 12, 2019 12:59 pm
operating_system: Windows 10
System_Drive: C
32bit or 64bit: 64 Bit

Re: Loss of metada in PSP vX4

Postby ehume » Fri May 03, 2019 2:04 am

ToreB wrote:I just referred to a thread on the subject:
https://stackoverflow.com/questions/954 ... a-like-jpg
I am not a programmer and this is a bit technical for me. I just want my photo edit program not to throw away data. PSP apparantly is not for me, and sadly I have paid good money for a (for me) useless product.
I had the idea that this forum could help me report what I thought was a bug. Apparently this is not a bug but just a badly executed program.
No need for you to waist your valuable time on me, i'll stick with Affinity Photo.

Affinity is a pretty good program, well worth the $40-50 it usually costs. OTOH, I have been using PSP since Windows 3.1, upgrading periodically. I would miss some of the conveniences PSP offers.

Try this: use Affinity to start with your raw and .png images, use PSP on the rest. I myself handle raw with Silkypix Pro 7 and SE 8 for raw, save the results as 16-bit/pixel .tif images, which I then pick up and edit with PSP. Could I go from raw to finished product without leaving Affinity? Sure. But I really like PSP. You could handle raw with Affinity and File > Export .tiff images or .jpg images with Affinity's powerful and flexible export function, but you will find PSP growing on you. And who knows? Maybe the devs will fix PSP's mis-handling of .png images.
Had PS3, PSP3; Installed: PSP-4.12, 5.03, 6.02, 7.04 (liked it a lot & used it for years), 8.10, 9.01, 10, 11, x4, x6, x7, x8, x9; now using PSPx10 (PSP 2018; version 20.2.0.1 x64) on Win 10-64; rejected PSP 2019.
User avatar
ehume
 
Posts: 445
Joined: Tue Sep 18, 2012 2:05 am
operating_system: Windows 7 Home Premium
System_Drive: C
32bit or 64bit: 64 Bit
motherboard: Gigabyte GA-Z87X-UD4H
processor: i7 4770k
ram: 16GB
Video Card: Intel HD4600
sound_card: no_sound_card
Hard_Drive_Capacity: 512GB+4TB
Monitor/Display Make & Model: Acer KN242HYL
Corel programs: PSP 2018 32b & 64b, AS3 64b, PE5 64b

Previous

Return to Paint Shop Pro

Who is online

Users browsing this forum: No registered users and 14 guests