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電腦觀點-初學者討論區 • 檢視主題 - 圖檔尺寸修改教學-簡易篇。

圖檔尺寸修改教學-簡易篇。

軟體的教學文章收錄於此,歡迎各界發表。

版主: hammer, baga80

圖檔尺寸修改教學-簡易篇。

文章baga80 » 週六 1月 06, 2007 1:59 pm



隨著數位相機、掃描器、照相手機的普遍,
圖檔影響範圍越來越廣,
舉凡:
手機螢幕照、背景、
MSN、YAHOO、SKYPE的聊天軟體、
履歷的照片,
個人部落格的照片簡介,
網路上越來越多的網站走向個人化,
可以加入個人頭像、放上你自己的照片集、在簽名檔放入個性圖檔簽名...
等等等
諸如此類的服務越來越多。

要知道在擺在網路上供人觀看的圖檔,大多遵守了幾個基本的原則;
A.圖檔大小越小越好(檔案越小在網路上的讀取速度越快)。
B.圖檔尺寸要正確(一般網頁設計不過就是1024*768或800*600,超過這個解析的尺寸一點意義也沒有)。

而數位相機或手機強調的都是高像素,這樣造成的結果就是圖檔超大,
拿去沖洗或是在大螢幕上觀看固然好,但也造成了這些圖檔在使用上列服務時的困擾。
這樣的圖檔(照片)在未經處理前,直接套用到網路上,
不是把各種部落格的版面撐的超級大、破壞版面整齊,就是無法上傳。
要不就是造成觀看的朋友一張圖檔要開數分鐘。

接下來我們就這一部份做個教學,分為兩部分(簡易版跟進階版):

PS:
如果你的電腦裡面有PhotoShop軟體的話,
你可以參考本討論區Dora老師的教學。



由於PhotoShop軟體是需要付費購買的軟體,
一般人家裡的電腦不見的有安裝,
故,接下來的簡易教學,我們採用的軟體是『小畫家』!!

瞎瞇?『小畫家』???
有沒有搞~~~~錯??
沒有搞~~~~~錯!!!正是你家電腦裡面一定有的『小畫家』!(謎之音:不要老學周星星啦) :lol:

通常小畫家位於『程式集』(或所有程式)--『附屬應用程式』裡,
找到它並且開啟。
圖檔

一般來說,你要是沒用過小畫家的話,畫面預設值是有點小的。
圖檔

拉一拉視窗的邊框,讓視野好一點,符合自己的習慣。
圖檔

點選工作列上的『檔案』-『開啟舊檔』。
圖檔

瀏覽找到自己要的圖檔,在這裡運用一些小技巧,讓滑鼠停留在檔案上一下下,
可以看到這個檔案的『尺寸』為2048X1536(dpi),
『大小』為1.22MB,這樣的圖檔,不僅讓瀏覽的人看來麻煩,
就連上傳都得很久。
圖檔

開啟之後,你看,很明顯的過大到小畫家都無法一覽。
圖檔

此時,開啟工作列上的『影像』--『延展/扭曲』。
圖檔

會出現『延展/扭曲』小視窗,水平跟垂直預設值皆為『100%』。
圖檔

此時我們將水平及垂直皆輸入『20%』,
為何為『20%』?還記得我們的圖檔原來尺寸為多少嗎?
對的,2048X1536(dpi),
而一般放在網路上的圖檔盡量不超過500(寬)X500,
所以,500/2048就是約等於1/4,也就是約『20%-25%』,
這部分可自行拿捏。
圖檔

按下確定後,嘿嘿,完整又清晰的圖檔出現了!
圖檔

點選工具列--『檔案』--『另存新檔』。
圖檔

更改檔名後存在你想要的位置,這樣就完成了!
夠容易吧?
圖檔

我們來看看,修改後的檔案,
圖檔尺寸變成410X308(dpi)
檔案大小變成30.7KB,差異夠大吧?將近40倍!!
這麼一來,無論上傳下載都方便許多了。
圖檔

PS:操作過程要留意的是,水平跟垂直的修改值要一樣,不然可是會變形喔!

至於更進階的修改方式,我們會在下一次『進階篇』做更詳盡的教學。
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