Markii hore, waxaan qoray maqaal ku saabsan sida loo yareeyo cabbirka faylka sawirka  iyadoo la adeegsanayo ikhtiyaarka email-ka ee ku dhex jira Explorer ama isticmaalka barnaamijka desktop-ka ee loo yaqaan Resizer Image^{(Image Resizer)} for Windows . Kuwani waa xulashooyin wanaagsan, laakiin waxaa jira dhowr siyaabood oo kale oo loo maro hagaajinta sawirka. Sidoo kale, shabakado badan ayaa kuu sheegi doona inaad isticmaasho Rinjiga^(Paint) , laakiin waxaan ogaaday inaysan ahayn hab wanaagsan sababtoo ah sawiradu waxay u muuqdaan kuwo ka sii daraya.

Marka hore, waxaa muhiim ah in la fahmo in hababka qaar ee loo isticmaalo in lagu dhimo cabbirka sawirka ay keeni doonaan sawir tayo hoose leh, kaas oo laga yaabo inuu ku fiicnaado mareegaha, laakiin maaha daabacaadda. Tani waxay badanaa dhacdaa marka aad beddesho xallinta sawirka, ka 2560×1440 ilaa 1920×1080.

Si kale oo lagu dhimo cabbirka sawirka waa in la cadaadiyo sawirka. Waxaa jira laba nooc oo cadaadis ah: khasaare la'aan iyo khasaare. Isku- buufin^(Lossless) la'aanta ayaa yarayn doonta cabbirka sawirka iyada oo aan lumin hal pixel oo faylka asalka ah. Khasaare^(Lossy) waxay ka dhigan tahay in xogta qaar ay lumin doonto.

Ugu dambeyntii, qaabka sawirka ayaa sidoo kale ka dhigaya farqi weyn oo ku saabsan cabbirka faylka. Sawirka caadiga ah ee aad ka qaadatid kamaradaada waxay u badan tahay inuu noqdo sawirka JPG sababtoo ah taasi waxay si fiican u shaqeysaa marka la eego isku-buufinta. Si kastaba ha ahaatee, sawirada leh midabyo yar (256 midab ama ka yar) aad ayey u yar yihiin haddii aad isticmaasho GIF . PNG waa qaab aan khasaare lahayn oo si weyn loo cadaadin karo. Waxay si fiican ugu shaqeysaa garaafyada shabakadda iyo sawirro adag.

Maqaalkan, waxaan ku siinayaa dhowr tusaaleyaal shaashado ah oo lagu cadaadiyo sawirka iyadoo la adeegsanayo qaabab badan si aad u aragto kala duwanaanshaha cabbirka iyo tayada.

Sida Loo Yareyo Cabirka Sawirka

Aan ku bilowno inaan ka hadalno sida aad u yareyn karto cabbirka sawirka adigoon lumin tayada. Tani waxay ku siin doontaa faylka ugu yar adigoo ilaalinaya tayada asalka ah ee sawirka. Sida iska cad, adeegsiga isku-buufinta khasaaraha ayaa ku siin doonta faylal aad uga yaryar, sida aad ku arki doonto tusaalooyinka hoose, laakiin waxaad lumin doontaa tayada qaar.

Qaabka & Cadaadiska

Marka hore, aan ku bilowno garaaf midab fidsan. Tusaale ahaan, waxaan kaliya ka qaaday shaashadda shabakada HDG (600×319) maadaama ay leedahay midabyo yar oo aan ahayn mid adag. Waa kuwan cabbirrada faylalka ee qaabab kala duwan iyadoon wax la isku riixin:

GIF asalka ah: 27 KB

JPEG asalka ah: 67 KB

Asalka PNG: 68 KB

Sida aad arki karto, feylasha PNG iyo GIF xaqiiqdii way ka af badan yihiin JPEG . Sidii hore loo sheegay, JPEG ayaa u fiican sawir qaadista. GIF si fiican ayuu halkan u qabtaa maadaama ay tahay 27 KB kaliya marka loo eego PNG , oo ah 68 KB. Si kastaba ha noqotee, waayo-aragnimadayda, PNGs waxay si fiican u cadaadinayaan haddii ay tahay cadaadis lumis iyo tayada sawirku weli waa mid aad u wanaagsan.

Markii aan sameeyay cadaadis aan khasaare lahayn oo saddexda ah, kaliya sawirada JPG iyo PNG ayaa hoos u dhacay cabbirkooda, laakiin maahan wax badan. PNG - gu wuxuu tagay 45 KB, JPG -guna wuxuu tagay 58 KB. Markii aan sameeyay cadaadis lumis, tirooyinka PNG ayaa ahaa kuwa ugu cajiibsan.

GIF Khasaare: 22 KB

Khasaare JPEG: 50 KB

Khasaare PNG: 23 KB

Sida aad arki karto, PNG -gu waxa uu u muuqdaa kan ugu fiican, waana 1 KB oo keliya ka weyn GIF -ga ! Taasi waa sababta aan u isticmaalo sawirada PNG ee boggan inta badan sawir-qaadistayda. JPEG had iyo jeer waxay u fiicnaan doontaa sawirada sawir qaadista midabyo badan. Laakiin xusuusnow, JPG waa 16-bit oo kaliya, halka PNG ay tahay 24-bit, markaa JPG waxay taageertaa malaayiin midab, laakiin PNG waxay taageertaa midabyo aan xadidnayn.

GIF kaliya ayaa hoos u dhacay 5 KB, laakiin isla mar ahaantaana waxay lumisay tayo badan. JPG - gu wax badan ma cadaadin, laakiin JPG-yadu^(JPGs) sida caadiga ah ma cadaadiyo si la mid ah PNG-yadu^(PNGs) .

Waxaad isticmaali kartaa abkaaga sawirka si aad u bedesho qaabka sawirka si aad u aragto cabbirka ugu yar. Cadaadiska, waxaan ku talinayaa in la isticmaalo qalabka internetka maadaama ay qabtaan shaqo weyn. Anigu shakhsi ahaan waxaan u isticmaalaa Kraken.io shabakadayda, laakiin waxaa jira kuwa kale oo wanaagsan sida TinyPNG  iyo Optimizilla .

Beddel Xallinta Sawirka

Habka ugu muhiimsan ee sawirka loo dhimi karo waa in la yareeyo xallinta sawirka. Haddii aad haysato fayl dhan 4000×2500, ka dibna hoos u dhigista cabbirka ilaa 2000×1250 waxay ka dhigaysaa faylka kala badh cabbirka. Sida cad waxaad lumin doontaa qayb weyn oo sawirka asalka ah ee xogta, laakiin waxay ku xidhan tahay ujeedadaada, waxaa laga yaabaa inaanay waxba yeelayn.

Barnaamij kasta oo tafatirka sawirku wuxuu yeelan doonaa hab aad ku beddesho ama aad wax uga beddesho sawirka. Halkan waxa aad ka beddeli kartaa ballaca/dhererka ama xallinta, kuwaas oo sida caadiga ah dhibco halkii inch ah ( DPI ) ama pixels per inch ( PPI ). Akhri maqaalkan weyn ee ku saabsan farqiga u dhexeeya DPI iyo PPI^{(difference between DPI and PPI)} . Wax kasta oo shabakada ah, kaliya waa inaad ka walwashaa pixels, maaha dhibco. Dhibcuhu^(Dots) waxay saamayn doonaan oo kaliya sawirada daabacan.

Marka, tusaale ahaan, mareegahaygu wuxuu yeelan karaa oo keliya sawirro ilaa 680 pixels ballaaran. Sidaa darteed^(Therefore) , waxaan had iyo jeer dib u cabbiraa sawirka ilaa 680 pixels ama ka hooseeya ka hor intaanan soo dhejin sababtoo ah haddii kale WordPress wuxuu u beddelayaa 680px aniga, laakiin cabbirka faylka ayaa ka weynaan doona inta uu u baahan yahay.

Haddii aad rabto inaad wax badan ka fahanto lambarka 72 pixels/inch iyo ikhtiyaarka dib-u-samaynta, eeg qoraalkan wanaagsan ee^{(excellent post)} si faahfaahsan u socda.

Beddel Moolka/Qaabka Midabka

Tusaalaha kore, haddii aad haysato sawir leh midabyo yar, markaa uma baahnid inaad isticmaasho qaab muuqaal ah oo taageeraya malaayiin midab ah. Tusaalaha boggayga, GIF kaliya wuxuu u baahan yahay inuu taageero midabka^(Indexed) la tilmaamay iyo 8 bits/channel.

Waxaad dooran kartaa midabka RGB iyo 16 bits/channel, laakiin sawirku wuxuu u ekaan doonaa isku mid, laakiin wuxuu leeyahay cabbir ka weyn. Waxaad ka akhrisan kartaa wax badan oo ku saabsan qaababka midabada^{(colors modes)} bogga Adobe. Marka laga soo tago Photoshop , badiyaa tifaftirayaasha sawirada sidoo kale waxay kuu ogolaanayaan inaad beddesho qoto dheer / qaabka midabka sawirka.

Sawirka Dalagga

Hab kale oo sahlan oo lagu dhimi karo cabbirka sawirka waa in si fudud loo gooyo! Wax kasta oo la gooyay waa laga saarayaa sawirka. Si kastaba ha ahaatee sawirka aad leedahay, waxaad sida caadiga ah u gooyn kartaa wax yar ugu yaraan, taas oo hubaal ka caawin doonta yaraynta cabbirka.

Ogowna in dalagga uusan ahayn kaliya inuu noqdo midka caadiga ah ee aad ka gooyso walxaha korka/hoose ama bidix/midig. Tifaftiraha SnagIt^{(SnagIt Editor)} , mid ka mid ah kuwa aan jeclahay, ayaa leh qalab la gooyey oo kuu ogolaanaya inaad ka jarto qaybo ka mid ah sawirada bartamaha sawirka si toosan ama toosan. Tani waxay ku timaadaa hab anfacaya marar badan inta aad malaynayso. Waa kan tusaale halkaas oo ay tahay in aan ku daro shaashadda shaashadda ee Start menu marka aan qorayo amar.

Cabbirka faylka sare wuxuu asal ahaan ahaa 22 KB. Halkii aan isticmaali lahaa, waxaan gooyay qaybta dhexe, taas oo aan u baahnayn sida hoos ku qoran.

Cabbirka faylka cusub waa kaliya 9 KB! Waxaas oo dhan iyada oo aan xitaa la samayn wax cadaadis ah ama beddelin qaabka faylka. Markii aan isku dhufto, waxaan ka helay 4.4 KB kaliya. Markaa beergooyntu waa hab muhiim ah oo lagu dhimo cabbirka sawirka.

Waxaan rajeyneynaa, inaad yareysay cabbirka sawirkaaga oo aad wax yar ka baratay sida sawirada dhijitaalka ah ay u shaqeeyaan! Haddii aad wax su'aalo ah qabtid, xor u noqo inaad faallo ka bixiso. Ku raaxayso!

How to Reduce the Size on an Image File

Previously, I wrote аn artіcle on how to reduce the ѕize of an image file using the built-in emаіl option in Explorer or by using a desktop program called Image Resizer for Windows. These are good options, but there are several other wаys to go about optimizіng an image. Also, a lot of websites will tell you to use Paint, but I have found it’s not a good method because the images look way worse.

Firstly, it’s important to understand that some methods used to reduce the size of an image will result in a lower quality picture, which may be fine for a website, but not for printing. This usually occurs when you change the resolution of a picture, say from 2560×1440 to 1920×1080.

Another way to reduce the size of an image is to compress the image. There are two types of compression: lossless and lossy. Lossless compression will reduce the size of the image without losing a single pixel of the original file. Lossy means that some data will be lost.

Finally, the picture format also makes a big difference in the size of the file. A normal picture you take from your camera will probably be a JPG image because that works well in terms of compression. However, images with few colors (256 colors or less) will be a lot smaller if you use GIF. PNG is a lossless format that can be highly compressed. It works well for web graphics and complex photographs.

In this article, I give a few examples with screenshots of compressing an image using multiple formats so you can see the size and quality differences.

How to Reduce Image Size

Let’s start off by talking about how you can reduce the size of the image without losing quality. This will give you the smallest file while keeping the original quality of the image. Obviously, using lossy compression will give you much smaller files, as you’ll see in the examples below, but you’ll lose some quality.

Format & Compression

First, let’s start with a flat color graphic. As an example, I just took a screenshot of the HDG website (600×319) since it has few colors and isn’t complex. Here are the files sizes in the different formats without any compression:

Original GIF: 27 KB

Original JPEG: 67 KB

Original PNG: 68 KB

As you can see, the PNG and GIF files are definitely sharper than the JPEG. As mentioned earlier, JPEG is better for photography. GIF does well here as it’s only 27 KB compared to the PNG, which is 68 KB. However, in my experience, PNGs compress much better if it’s a lossy compression and the image quality is still very good.

When I did a lossless compression of the three, only the JPG and PNG images got reduced in size, but not by much. The PNG went to 45 KB and the JPG went to 58 KB. When I did a lossy compression, the numbers for PNG were the most impressive.

Lossy GIF: 22 KB

Lossy JPEG: 50 KB

Lossy PNG: 23 KB

As you can see, the PNG looks the best and it’s only 1 KB bigger than the GIF! That’s why I use PNG images on this website for most of my screenshots. JPEG will always normally be better for photography images with lots of colors. But remember, JPG is only 16-bit, whereas PNG is 24-bit, so JPG supports millions of colors, but PNG supports unlimited colors.

The GIF only reduced by 5 KB, but at the same time lost a lot of quality. The JPG didn’t compress much, but JPGs normally don’t compress as well as PNGs do.

You can use your photo app to change the format for an image to see which size is smallest. For compression, I recommend using online tools as they do a great job. I personally use Kraken.io for my websites, but there are other good ones out there like TinyPNG and Optimizilla.

Change Image Resolution

The main way to shrink an image is to lower the picture resolution. If you have a file that is 4000×2500, then reducing the size to 2000×1250 will make the file half the size. You’ll obviously be losing a large chunk of the original image in the data, but depending on your purpose, it may not matter.

Every image editing program will have a way for you to change or resize the image. Here you can change the width/height or the resolution, which is normally dots per inch (DPI) or pixels per inch (PPI). Read this great article on the difference between DPI and PPI. For anything on the web, you only have to worry about pixels, not dots. Dots will only effect printed images.

So, for example, my website can only have images up to 680 pixels wide. Therefore, I always resize an image to 680 pixels or lower before uploading it because otherwise WordPress will resize it to 680px for me, but the file size will be larger than it needs to be.

If you want to understand more about the 72 pixels/inch number and the resample option, check out this excellent post that goes into great detail.

Change Color Depth/Mode

In the example above, if you have an image with only few colors, then you don’t need to use an image format that supports millions of colors. In my webpage example, the GIF only needs to support Indexed color and 8 bits/channel.

You can choose RGB color and 16 bits/channel, but the image would look exactly the same, but have a larger file size. You can read more about these colors modes on Adobe’s website. In addition to Photoshop, most image editors also let you change the color depth/mode for an image.

Crop Image

Another easy way to reduce the size of an image is to simply crop it! Anything that is cropped out will be completed removed from the image. No matter what image you have, you can normally crop it a little bit at least, which will definitely help reduce the size.

And note that a crop doesn’t just have to be the typical one where you cut out stuff from the the top/bottom or left/right. SnagIt Editor, one of my favorites, has a cut out tool that lets you cut out parts of images from the middle of an image horizontally or vertically. This comes in handy way more often than you would think. Here’s an example where I have to include a screenshot of the Start menu while typing a command.

The above file size was originally 22 KB in size. Instead of using that, I cut out the middle portion, which I didn’t need as shown below.

The new file size is just 9 KB! All that without even doing any compression or changing the file format. Once I compressed it, I got it down to only 4.4 KB. So cropping is an important way to reduce the size of an image.

Hopefully, you reduced the size of your image and learned a little bit about how digital images work along the way! If you have any questions, feel free to comment. Enjoy!

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