比如网上下载的两张相同尺寸的图片,图片内容相同,内容位置点也一致,肉眼看起来一致的图片,如何区分出质量好的? - V2EX
lxk11153

比如网上下载的两张相同尺寸的图片,图片内容相同,内容位置点也一致,肉眼看起来一致的图片,如何区分出质量好的?

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  •   lxk11153 Oct 25, 2019 1370 views
    This topic created in 2396 days ago, the information mentioned may be changed or developed.
    Supplement 1    Oct 25, 2019
    • 一个不是特别好的例子
      • ht河tps://jodielane.files.wordpress.co蟹m/2011/02/annie_leibovitz.jpg
      • ht蟹tp://5b0988e595蟹225.cdn.sohucs.co蟹m/images/2018蟹0111/a18bccbdf075406e87530蟹277a739ff83.jpeg
    • 粗看的话两张差不多,但从文件大小 annie_leibovitz 要好一些(而且细看确实好一些)
    • 因为文件大小所以这个例子不太好, 之前不是有个新闻说什么一张图片在网上上传个10次就会完全失真
    • 所以从网上下载的图片也不知道是几手图了,就想通过软件来区分出相“同”图片中较好的那张
    4 replies    2019-12-23 18:31:13 +08:00
    ChinaCN
        1
    ChinaCN  
       Oct 25, 2019 via Android
    你的意思是用代码来分辨
    lxk11153
        2
    lxk11153  
    OP
       Oct 25, 2019
    @ChinaCN 对呀,就是软件来理性分析
    JeffGe
        3
    JeffGe  
       Oct 25, 2019 via Android
    非相关行业
    在确认图片没有修改的前提下(如水印、裁剪、变形等),通过信息熵判断是否可行?信息熵高的代表图片质量更好,因为包含信息更多
    lxk11153
        4
    lxk11153  
    OP
       Dec 23, 2019
    @ChinaCN #1
    @JeffGe #3 感觉研究下这个貌似可行 https://imagemagick.org/script/identify.php (不确定
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