今天這是上次的這篇測試的後續：
AI繪圖-實測：比較目前20種採樣方式的速度與圖片生成結果(stable diffusion webui) 在上次測試完成之後，總覺得越想越不對勁，好像少了點什麼。20種採樣方式，隨機生成四張圖，好像沒什麼可比性，每一組的生成結果都差不多是有好有壞。如果畫四張不同的圖比不出好壞，那全部畫"同一張圖"的話呢?
今天就來比較使用同一組prompt並且使用同一組seed的生成結果，這個測試並非我的獨家測試，不過我看過的測試大多是把幾十張圖縮成一張小圖，模模糊糊的一筆帶過，實在是看不出什麼細節。
測試模式：生成模型統一採用Chilloutmix-Ni，
採樣步數(Sampling steps)一律設成30步，seed與prompt都設成相同。
這次總共測試兩組。
第一組
基礎繪圖設定如下：
1girl, asia face,(colorful dress),young face, blue eyes,lively street, looking at viewer, facing front, ultra high res, (photorealistic:1.4),masterpiece,best quality,official art, (8k, RAW photo:1.2),(portrait:1.4), cinematic lighting ,(solo:1.7), (eyelashes:1.1), (happy:1.21), (depth of field:1.1), lens flare, (chromatic aberration:1.1), (caustics:1.1),full body,delicated,
Negative prompt: paintings, sketches, fingers, (worst quality:2), (low quality:2), (normal quality:2), lowres, normal quality, ((monochrome)), ((grayscale)), skin spots, acnes, skin blemishes, age spot, (outdoor:1.6), backlight,(ugly:1.331), (duplicate:1.331), (morbid:1.21), (mutilated:1.21), (tranny:1.331), mutated hands, (poorly drawn hands:1.5), blurry, (bad anatomy:1.21), (bad proportions:1.331), extra limbs, (disfigured:1.331), (more than 2 nipples:1.331), (missing arms:1.331), (extra legs:1.331), (fused fingers:1.61051), (too many fingers:1.61051), (unclear eyes:1.331), lowers, bad hands, missing fingers, extra digit, (futa:1.1),bad hands, missing fingers,nipple,nude,sexy,nsfw
Steps: 30, Sampler: 全部, CFG scale: 7, Seed: 4080438386, Face restoration: CodeFormer, Size: 800x800, Model hash: 7234b76e42, Model: Chilloutmix-Ni, ENSD: 31337
繪圖成品如下：
我還是一樣提供一組縮圖：
Euler a
Euler
LMS
Heun
DPM2
- DPM2 a
DPM++2S a
DPM++2M
DPM++SDE
DPM fast
DPM adaptive
LMS Karras
DPM2 Karras
DPM2 a Karras
DPM++2S a Karras
DPM++2M Karras
- DPM++SDE Karras
DDIM
PLMS
UniPC
第二組
基礎設定如下：
其實是同一組prompt，只是seed值有變
1girl, asia face,(colorful dress),young face, blue eyes,((lively street)), looking at viewer, facing front, ultra high res, (photorealistic:1.4),masterpiece,best quality,official art, (8k, RAW photo:1.2),(portrait:1.4), cinematic lighting ,(solo:1.7), (eyelashes:1.1), (happy:1.21), lens flare, (chromatic aberration:1.1),((full body)),delicated,
Negative prompt: paintings, sketches, fingers, (worst quality:2), (low quality:2), (normal quality:2), lowres, normal quality, ((monochrome)), ((grayscale)), skin spots, acnes, skin blemishes, age spot, (outdoor:1.6), backlight,(ugly:1.331), (duplicate:1.331), (morbid:1.21), (mutilated:1.21), (tranny:1.331), mutated hands, (poorly drawn hands:1.5), blurry, (bad anatomy:1.21), (bad proportions:1.331), extra limbs, (disfigured:1.331), (more than 2 nipples:1.331), (missing arms:1.331), (extra legs:1.331), (fused fingers:1.61051), (too many fingers:1.61051), (unclear eyes:1.331), lowers, bad hands, missing fingers, extra digit, (futa:1.1),bad hands, missing fingers,nipple,nude,sexy,nsfw
Steps: 30, Sampler: 全部, CFG scale: 7, Seed: 1106163400, Face restoration: CodeFormer, Size: 800x800, Model hash: 7234b76e42, Model: Chilloutmix-Ni, ENSD: 31337
繪圖成品如下：
縮圖：
Euler a
Euler
LMS
Heun
DPM2
DPM2 a
DPM++2S a
DPM++2M
DPM++SDE
DPM fast
DPM adaptive
LMS Karras
DPM2 Karras
DPM2 a Karras
DPM++2S a Karras
DPM++2M Karras
DPM++SDE Karras
DDIM
PLMS
UniPC
結語：
1.看完後我審美觀麻木了。
2.DPM++SDE Karras的構圖常常比別組採樣方式更有自己的特色，偶爾還會自己加料加細節，也難怪網路上常會推薦DPM++SDE Karras這組採樣方式。
3.Euler a速度算快，繪圖成品也有自己的特點，算是兼顧速度與品質的平衡點，能站在C位(選單第一位)不是沒有理由的。
4.以上評論僅是就視覺結果簡評，無關美醜，也無關勝負，事實上我一樣無法選出"最好"或"最爛"的，若非得講個確定性的結論的話，我只能說DPM adaptive的繪圖速度真的是慢爆了，如非必要我一定不會用。