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coobird avatar coobird commented on May 27, 2024

There have been similar issues reported in the past, and usually it can be solved by forcing the image type to be BufferedImage.TYPE_INT_ARGB by .outputFormat(BufferedImage.TYPE_INT_ARGB) -- not setting this will make Thumbnailator perform image processing on the original image type which could introduce these types of issues.

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aleksanderFox avatar aleksanderFox commented on May 27, 2024

Perhaps .outputFormat(BufferedImage.TYPE_INT_ARGB) is a typo?
It was meant .imageType(BufferedImage.TYPE_INT_ARGB)?

        int imgType = originalImage.getType();
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        Thumbnails.of(originalImage)
                .size(targetWidth, targetHeight)
                .outputFormat(formatName)
                //.imageType(imgType)
                .imageType(BufferedImage.TYPE_INT_ARGB)
                .outputQuality(1)
                .toOutputStream(outputStream);

Unfortunately, the above code did not help to fix the error.

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LouisWayne avatar LouisWayne commented on May 27, 2024

I had a similar issue (converting from PNG to JPG) but fixed it by using BufferedImage.TYPE_INT_RGB

BufferedImage thumbnailImg = Thumbnails.of(pngImage)
    .size(width, height)
    .outputFormat("jpg")
    .imageType(BufferedImage.TYPE_INT_RGB) // PNG -> JPG
    .asBufferedImage();

It's a bit cumbersome since we need to set imageType(...) manually

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