malibusa

File getting more size after saving

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Hi,

 

I am a basic user of paint.net, and use it for basic things

 

I have an image JPG file, say of size 1MB, after scanning the original image

opened paint.net cropped the image to the required

then saving it

 

now, it shows the Quality option when saving, which i keep as default 95

but when saving the file, the file size gets more,

instead of 1MB, it could go up to 3MB

 

what's the wrong thing I did? and how to save it

 

the image has been scanned on 300dpi, and I would keep the same of the cropped area of the original image

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The first thing I wonder is, what was the Quality of the original scanned image? If it was lower than 95, I'd expect the file to get larger.

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18 hours ago, MJW said:

The first thing I wonder is, what was the Quality of the original scanned image? If it was lower than 95, I'd expect the file to get larger.

 

how to know it?

is it the dpi in properties?

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Unless it's a setting in the scanning software, I'm not sure. It could possibly be in the image meta-data, but when I checked the JPEG file for photo I took (using the default Windows "View Image Info"), the compression field was blank. According to Wikipedia, 50 is considered to be high-quality, so 95 is probably higher than usual.

 

My actual point was just that there could be a simple explanation for the size increase. I'm pretty sure Paint.Net doesn't rely on a custom JPEG conversion algorithm. It probably uses one built into Windows.

 

EDIT: The dpi is unrelated to the compression.

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thanks

On 6/8/2019 at 11:06 PM, MJW said:

Unless it's a setting in the scanning software, I'm not sure. It could possibly be in the image meta-data, but when I checked the JPEG file for photo I took (using the default Windows "View Image Info"), the compression field was blank. According to Wikipedia, 50 is considered to be high-quality, so 95 is probably higher than usual.

 

My actual point was just that there could be a simple explanation for the size increase. I'm pretty sure Paint.Net doesn't rely on a custom JPEG conversion algorithm. It probably uses one built into Windows.

 

EDIT: The dpi is unrelated to the compression.

 

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