Description: Image looses quality when using image compression (in multiple cases, especially when reducing the image resolution) Steps to Reproduce: 1. Open the attached file 2. Right click the image -> Compress image 3. Choose JPG, reduce the image resolution to for example 200dpi The only case where it certainly doesn't happen is when exporting to PNG (aty any compression) without reducing the image resolution. Actual Results: Image looses quality Expected Results: Shouldn't happen Reproducible: Always User Profile Reset: No Additional Info: Found in Version: 6.0.0.0.alpha1+ Build ID: b3f1d199a72ce87cb65ddaeac922564f57da6a4d CPU threads: 4; OS: Windows 6.3; UI render: default; TinderBox: Win-x86@42, Branch:master, Time: 2017-11-06_00:10:53 Locale: nl-NL (nl_NL); Calc: CL and in 4.2.0.4 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0
Created attachment 137858 [details] Example file
I did not use your example (bad quality) but made my self a screenshot, imported in writer and did follow the steps. I cannot reproduce a bad compressed image at 200 dpi, but with 96 dpi its ugly Version: 6.0.0.0.alpha1+ Build ID: dfc45f0abab98a1ce977c6ed95dfa07c185b6d11 CPU threads: 8; OS: Linux 4.14; UI render: default; VCL: kde4; Locale: nl-BE (en_US.UTF-8); Calc: group
What do you mean "reduce" to 200? The apparent dimensions in the info is 145 DPI. Anyway, why wouldn't it lose quality, if you reduce the DPI? I would expect it to lose quality.
I tried the following 1. Inserted a picture in writer (DPI 180) 2. Compressed this picture to 96 DPI 3. Compressed the original picture to 96 DPI with IrfanView and insert this picture in writer 4. Made a comparisson between those two pictures, but couldn't find a difference. So I would say it's a bug, if the comparisson with writer produces less quality than a compression with other programs. But for me that wasn't the case.
According to comments #3 and #4 closing as NotABug. Feel free to reopen if you disagree. Best regards. JBF