files sizes.

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paul04

Senior Member
I Was testing out HDR the other day, from photoshop to Nik tools, 4 shots into 1,

and was amazed by the finished file size, just under 1GB in TIFF format.

98gb.jpg

DSC_2128[1]_HDR-2.jpg
 
BackdoorArts

BackdoorArts

Senior Member
I suspect you're preserving layers in the TIFF? Each content layer is effectively a flat image stored in the file, so eliminating/flattening layers you no longer need will save you space. Adjustment layers, on the other hand, are space free.

So, if you have all 4 original images in the file, and then the post-HDR Efex Pro image, that effectively 5 TIFF files, so yeah, it's not surprising it's that big.
 
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WayneF

Senior Member
Yeah, very nice image, but I'm thinking it may not quite compute.

Uncompressed 0.98 GB = 912 million bytes / 3 = 304 megapixels, about. That would be four 76 megapixel images.

At a 3:2 ratio, that would be 21354 x 14236 pixels

Is it really that large?
 
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paul04

Senior Member
WayneF said:
Yeah, very nice image, but I'm thinking it may not quite compute.

Uncompressed 0.98 GB = 912 million bytes / 3 = 304 megapixels, about. That would be four 76 megapixel images.

At a 3:2 ratio, that would be 21354 x 14236 pixels

Is it really that large?
Click to expand...

I can only go off what it says in the properties of the picture,
I've done single pictures from lightroom to nik tools and they was 137mb when saved as jpeg.
 
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WayneF

Senior Member
paul04 said:
I can only go off what it says in the properties of the picture,
I've done single pictures from lightroom to nik tools and they was 137mb when saved as jpeg.
Click to expand...


What is the dimension of the final image, in pixels?

Photoshop resize box will show it, menu Images - Image Size (Width, Height).
 
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WayneF

Senior Member
Image size is only dimensioned in pixels.
File size is dimensioned in bytes, or KB or MB or GB.

But that seems way small now. It looks like ONE original D7100 image, slightly cropped. If it is four, then it is tremendously cropped.

5834x3829 pixels is 22,338,386 pixels (22.3 megapixels).
D7100 takes 24 megapixel images, 6000x4000 pixels.

22,338,386 pixels * 3 bytes per pixel for RGB is 67,015,158 bytes data size (uncompressed),
JPG files might be 1/5 or 1/10 that size.

Four of them might be nearly 4x that (less due to panoramic overlaps, cropping, etc).

I don't see any way to compute 1 GB. Maybe 100MB or 200MB? But four is not over 1/4 GB. This one is less than 100MB.


No one is going to tell me I went the wrong way in original message, dividing instead of multiplying by 1.024 three times? My blunder, brain not in gear.

Worse, I just did the same thing here. :)
Corrected here now.
 
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