faulty TIFF files

[rnmerchant]

I've been using v 2019.8.16
I'm finding that the program is producing output TIFF files that are faulty - they are not readable by my image program (Corel Paintshop Pro) and are causing XNview to simply crash.
The output options were the default 600dpi but changed from b/w to output in color.
I don't have the ability to look at the TIFF files otherwise to determine the problem. They were quite big files - a scan of a broadsheet newspaper. I should try again outputting at 300 rather than the defaut 600 dpi.

[trufanov-nok]

Would be great if you attach an example of such faulty file.

[rnmerchant]

Happy to do so. I can't attach any here - tiff's apparently are not supported so I'll post the work on dropbox here: https://www.dropbox.com/scl/fo/h56ssuk4q557c5vshltds/h?rlkey=tla955w5dxd7mwgl1w32zejr7&dl=0 There are 5 that I cannot read, but two (numbers 002 & 003) that I can.

[sclsj]

I tried and I can open your file in Affinity Photo. It used 19GB of RAM but everything felt smooth. I'm on a m1 max macbook running macOS 12.

[rnmerchant]

Odd that the dropbox folder has only one file in it rather than the several I referred to . In any case I"ve removed it now, but I can confirm that I cannot read it and Windows reports that it is "corrupted". I've posted a different one here: https://cloud.nmerchant.ca/s/zQadXLNHtFNiXER and I can confirm that this one too is "corrupted". Are there Tiff file types that Mac's can read but not Windows? All too odd for me I'm afraid but it does make the program less useful to me.

[sclsj]

I can open the file just fine. I won't necessarily conclude that this is a OS fault - had you tried using other softwares?

[sclsj]

Affinity photos are also available on Windows. As a last resort you can try that out.

[sclsj]

identify -verbose /Users/jin/Downloads/pacemaker\ story-005.tiff 
Image:
  Filename: /Users/jin/Downloads/pacemaker story-005.tiff
  Permissions: rw-r--r--
  Format: TIFF (Tagged Image File Format)
  Mime type: image/tiff
  Class: DirectClass
  Geometry: 35096x43682+0+0
  Resolution: 600x600
  Print size: 58.4933x72.8033
  Units: PixelsPerInch
  Colorspace: sRGB
  Type: TrueColor
  Endianness: LSB
  Depth: 8-bit
  Channels: 3.0
  Channel depth:
    Red: 8-bit
    Green: 8-bit
    Blue: 8-bit
  Channel statistics:
    Pixels: 1533063472
    Red:
      min: 27  (0.105882)
      max: 254 (0.996078)
      mean: 196.432 (0.77032)
      median: 229 (0.898039)
      standard deviation: 57.6382 (0.226032)
      kurtosis: -0.232566
      skewness: -1.19414
      entropy: 0.764186
    Green:
      min: 16  (0.0627451)
      max: 209 (0.819608)
      mean: 157.882 (0.619146)
      median: 187 (0.733333)
      standard deviation: 50.5595 (0.198273)
      kurtosis: -0.450821
      skewness: -1.09917
      entropy: 0.78352
    Blue:
      min: 0  (0)
      max: 200 (0.784314)
      mean: 136.043 (0.533502)
      median: 161 (0.631373)
      standard deviation: 47.9345 (0.187978)
      kurtosis: -0.641794
      skewness: -0.973386
      entropy: 0.830195
  Image statistics:
    Overall:
      min: 0  (0)
      max: 254 (0.996078)
      mean: 163.452 (0.640989)
      median: 192.333 (0.754248)
      standard deviation: 52.0441 (0.204094)
      kurtosis: -0.441727
      skewness: -1.0889
      entropy: 0.792633
  Rendering intent: Perceptual
  Gamma: 0.454545
  Chromaticity:
    red primary: (0.64,0.33,0.03)
    green primary: (0.3,0.6,0.1)
    blue primary: (0.15,0.06,0.79)
    white point: (0.3127,0.329,0.3583)
  Matte color: grey74
  Background color: white
  Border color: srgb(223,223,223)
  Transparent color: black
  Interlace: None
  Intensity: Undefined
  Compose: Over
  Page geometry: 35096x43682+0+0
  Dispose: Undefined
  Iterations: 0
  Compression: LZW
  Orientation: TopLeft
  Properties:
    date:create: 2024-05-10T03:22:17+00:00
    date:modify: 2024-05-10T00:41:02+00:00
    date:timestamp: 2024-05-10T03:25:06+00:00
    signature: ad8ad68ab2ef733d7dc3a15b6c5eef97ff0a7e91fbad44f507b29c8112b44f7c
    tiff:alpha: unspecified
    tiff:endian: lsb
    tiff:photometric: RGB
  Artifacts:
    verbose: true
  Tainted: False
  Filesize: 2.59972GiB
  Number pixels: 1.53306G
  Pixel cache type: Memory
  Pixels per second: 58.415MP
  User time: 22.000u
  Elapsed time: 0:27.244
  Version: ImageMagick 7.1.1-29 Q16-HDRI aarch64 21991 https://imagemagick.org

It seems like ImageMagick can open the file, I don't think the file is corrupted. Your software probably has a bug.

[rnmerchant]

I have tried a variety of different programs - 6 in all. All refuse to open it, stating 'bad file'. This includes 'ImageMagick Display'

I have no further understanding of what is going on. Perhaps a problem with my system but it seem unlikely that every piece of software I have 'has a bug'.

[sclsj]

You can try to report the errors to the relevant developers, and they might be able to fix it - perhaps it's quick fix! What is the exact error you get? Sometimes "bad file" can mean other things depending on how errors are handled. Perhaps a malloc call fails because you are out of memory?

What's your system configuration? How much RAM do you have?

As I said, as a last resort, try out Affinity Photos. They offer free trials. Even if it fails, this might give us more information to work on.

[bezverec]

The resolution of the image is ridiculous (1.53 giga pixels). When I change it to something more manageable (realistic for an ordinary newspaper/magazine scan using a book scanner), I am able to open it with no problems.
https://drive.google.com/file/d/1EbBq7q24l5yz4OrEL5dsZkwY7ecT87Md/view?usp=sharing
Can you share the source image? Has someone tried to upscale the image?