The factor that characterizes the appearance of glitches the most is the process called filter. There are elements else besides the transcoding process that could also influence the appearance of glitches such as transparent pixels and interlaces. It shows an effect similar to a snow noise image. On the other hand, “Compressed Data” glitches are flavored by their own compression algorithm, which is Deflate compression. The difference between the filters become clear when the “Filtered Data” is glitched. When “Filtered Data” is glitched, it shows a distinctive effect patterns that look like flower petals scatter around the image. I will explain about filters in the following subsection. This means that PNG glitches can be made when the “Filtered Data” or “Compressed Data” is manipulated.

The final “Formatted PNG” glitch will not work because of the checksum system I mentioned above. I will explain this in the next section). However, glitching the the first “Raw Data” is the same as glitching BMP, so it technically isn’t a PNG glitch (at the end, it is the same as PNG with the None filter applied. The chart shown below is a simplified explanation of how PNG encoding flows.Įach of the four states that are shown above can be glitch targets. Next we want to look at the transcode process of PNG. This means that we must rewrite the data after decoding CRC32, re-calculate it and attach it to the edited data. We need to create glitches accordingly to the PNG specification in order to avoid this failure. In other words, the PNG format is difficult to glitch. Therefore, it is impossible to generate glitches using simple methods such as rewriting part of the binary data using text editors or binary editors (you will completely fail). It is used to confirm corrupted images, and when it detects corruption in an image file, normal viewer applications refuse to display it. We should first look into the checksum system of the CRC32 algorithm. When we look at PNG from the point of view of glitch, what kind of peculiarity does it have?

However, we do not look at image formats from a general point of view, but rather think of ways to glitch them. Generally, it is known for its features such as lossless compression and the ability to handle transparent pixels. PNG is an image format that has a history of development beginning in 1995, and it is still a popular, long living format. The Art of PNG Glitch The Art of PNG Glitch Overview

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