Pixelmatch could not find background color diff

[utkukilincci]

Here is our comparison

you can find the images links below

https://cdn.dsmcdn.com/seller-ads/vrt/1685367692161.screenshot.png
https://cdn.dsmcdn.com/seller-ads/vrt/1685100884772.baseline.png

[pashidlos]

@utkukilincci could you share what image comparison algorithm is used and it's settings in project details on main page?

[utkukilincci]

@utkukilincci could you share what image comparison algorithm is used and it's settings in project details on main page?

here is

[wintero92]

Any updates on this?

[utkukilincci]

Any updates on this ?

[wintero92]

In any case, the text pixel diff threshold is not the default value of diff tolerance -- the one with the typo -- but internal pixelmatch configuration that takes into account the distance measure of two given colors in given pixel under test.

It works like this:

• pixel diff threshold, i.e., threshold config for pixelmatch, pixelmatch will compare pixel by pixel measuring the colors, if you set threshold closer to the zero it will be more strict when it comes to the distance of the colors
• diff tolerance on vrt level which just allows number of different pixels returned by pixelmatch in percentile.

FYI: @utkukilincci

[utkukilincci]

so, what should I do?

[pashidlos]

@utkukilincci comparison is made by pixelmatch library
online demo with your images doesn't spot the diff either https://codepen.io/qgustavor/pen/pLbJvy
there is similar issue and basically nothing I could help with unless library is able to spot the diff mapbox/pixelmatch#127

you could try switching to lookSame library in config

[wintero92]

Or set the threshold for pixel match to lower number or even to zero, like I described above.

[pashidlos]

@wintero92 changing threshold wont help
here is example with 0.05

and 0

[wintero92]

And zero?