I am no expert in graphics or images but I do have some basic knowledge about them such as GIF is normally used for animated images, JPEG is for high quality pictures, BITMAP, I have no idea what is it for because the file size is huge, and finally PNG, the image format that I normally use in this site because the size is small and the quality is pretty good as well. Nisem strokovnjak na področju grafike ali slike, vendar imam nekaj osnovnega znanja o njih, kot so GIF se običajno uporablja za animirane slike, JPEG je za visoko kakovost slike, Bitmap, nimam pojma, kaj je to za velikost datoteke, ker je ogromen , in končno PNG, format slike, ki sem normalno uporabo v tem mestu, ker je majhna velikost in kakovost je dokaj dobra, kot dobro. If you do a search on JPG vs GIF vs PNG, you'll find a lot of information about these image formats and each has its own pros and cons. Če vam iskanje na vs JPG GIF PNG vs, boste našli veliko informacij o teh slikovnih datotek in vsaka ima svoje prednosti in slabosti.

Another thing I know is images can be compressed into smaller size. Druga stvar, vem, da je slike lahko stisnjen v manjši velikosti. Reason is I get to save my webhost bandwidth and also you guys can load up the page faster. Razlog je, da sem dobil rešiti svoj webhost pasovno širino in lahko tudi vi guys vstavite do strani hitreje. I normally use HyperSnap-DX to capture screenshot and also to do simple image editing. I normalno uporabo HyperSnap-DX za zajem zaslona in tudi ne preprosto urejanje slik. It can save the screenshot in many different image formats and lets you to choose if you want a higher quality or smaller size when I want to save the image. To lahko shranite screenshot v mnogih različnih oblikah podobo in vam omogoča, da izberete, če želite, kakovostnejše in manjše velikosti, ko hočem shraniti sliko. The images saved by HyperSnap is pretty small but I never knew that it could be compressed further. Slike, ki jih shrani HyperSnap je precej majhna, a nisem vedel, da bi lahko bilo še stisnjen. Compressing images and making it smaller is important as long as the quality of the image is not affected. Stiskanje slik in zaradi česar je manjša je pomembno, dokler kakovost slike ni prizadeta. Here are 4 free small and portable tools that can compress PNG images. Tukaj so 4 brez malih in prenosno orodje, ki lahko obkladek PNG slike.

I've put all 4 PNG compressors to the test to see how much time it requires for maximum compression and also the size of the PNG file that it managed to reduce. Sem dal vse 4 PNG kompresorjev za test videli, koliko časa potrebuje za maksimalno stiskanje in tudi velikost PNG, da jim bo uspelo zmanjšati.

1. 1. OptiPNG OptiPNG
OptiPNG compress PNG
OptiPNG is a PNG optimizer that recompresses image files to a smaller size, without losing any information. OptiPNG je optimističen, da recompresses PNG slikovne datoteke na manjšo velikost, ne da bi izgubili vse podatke. This program also converts external formats (BMP, GIF, PNM and TIFF) to optimized PNG, and performs PNG integrity checks and corrections. Ta program tudi pretvori zunanje oblike (BMP, GIF, TIFF in PNM) za optimizirano PNG, in opravlja PNG celovitost preverjanja in popravki. It is a command line utility, so you'll need to read the manual on the command line switches. To je pripomoček ukazne vrstice, tako da boste morali prebrati priročnika o stikal ukazne vrstice. The command line for OptiPNG to compress at maximum is “optipng -o7 image.png”. Ukazno vrstico za OptiPNG stisniti na najvišji ravni, je "optipng-O7 image.png". Take note that it is the letter o and NOT number zero. Vzemi ugotavljajo, da je pismo o NE in nič več. There is aa GUI for OptiPNG called Obstaja aa GUI za OptiPNG imenovane akJ OptipngWrapper akJ OptipngWrapper created by Aki which runs on Java. ustanovljen s Aki, ki deluje na Java.

OptiPNG took 48 seconds to compress a 170050 bytes PNG image file to 166204 bytes (-2.26%). OptiPNG je 48 sekund za stiskanje 170050 bytes PNG slikovne datoteke na 166.204 zlogov (-2,26%).

2. 2. pngcrush pngcrush
Pngcrush is an optimizer for PNG (Portable Network Graphics) files. Pngcrush je optimističen za PNG (Portable Network Graphics) datotek. It can be run from a commandline in an MSDOS window, or from a UNIX or LINUX commandline. To lahko traja od commandline v oknu MSDOS, ali UNIX ali LINUX commandline. Its main purpose is to reduce the size of the PNG IDAT datastream by trying various compression levels an PNG filter methods. Njen glavni namen je zmanjšati obseg Datastream PNG IDAT ga poskušajo stiskanjem različnih ravneh PNG filter metod. It also can be used to remove unwanted ancillary chunks, or to add certain chunks including gAMA, tRNS, iCCP, and textual chunks. Lahko se uporablja tudi za odstranjevanje neželene pomožne koščkih, ali dodati nekatere kose, vključno Gama, tRNS, ICCP, in tekstovne kose. Also a command line utility and there are many switches available. Tudi uporabnost ukazne vrstice, in obstaja veliko stikala na voljo. The maximum compression command is “pngcrush -brute image.png”. Stiskanje je največja zapoved "pngcrush-brute image.png".

pngcrush took 30 seconds to compress a 170050 bytes PNG image file to 167059 bytes (-1.75%). pngcrush je 30 sekund za stiskanje 170050 bytes PNG slikovne datoteke na 167.059 zlogov (-1,75%).

3. 3. AdvanceCOMP AdvanceCOMP
AdvanceCOMP is a collection of recompression utilities for .ZIP archives, .PNG snapshots, .MNG video clips and .GZ files. AdvanceCOMP je zbirka recompression utilities for. ZIP arhive,. PNG posnetki,. MNG in video posnetke. GZ datotek. It recompress ZIP, GZ, PNG and MNG files using the Deflate 7-Zip implementation. To recompress ZIP, GZ, PNG in MNG datotek prek deflacijo 7-Zip izvajanje. Also a command line utility. Tudi uporabnost ukazne vrstice. The command for highest compression for PNG file is “advpng -z4 image.png”. Ukaz za najvišji stiskanje za PNG je "advpng-z4 image.png".

AdvancedCOMP took 11 seconds to compress a 170050 bytes PNG image file to 163840 bytes (-3.65%). AdvancedCOMP je 11 sekund za stiskanje 170050 bytes PNG slikovne datoteke na 163.840 zlogov (-3,65%).

4. 4. PNGOUT PNGOUT
PNGOUT optimizes the size of .PNG files losslessly. PNGOUT biti optimističen velikosti. PNG datotek losslessly. It uses the same deflate compressor that the author wrote for KZIP.EXE. Uporablja isti deflacijo kompresorja, da je avtor napisal za KZIP.EXE. With the right options, it can often beat other programs by 5-10%. Z desno možnosti, je velikokrat premagati druge programe za 5-10%. That includes pngcrush -brute, optipng -o7, advpng -z4, etc. The command line for highest compresson for PNG file using PNGOUT is “pngout image.png”. To vključuje pngcrush-živalski, optipng-O7, advpng-z4, itd ukazne vrstice za najvišji compresson za PNG datoteko PNGOUT je "pngout image.png". By default it uses the Xtreme compression which is the highest. Z ne izpolniti obveznosti, ki jih uporablja Xtreme stiskanje, ki je najvišja.

PNGOUT took 141 seconds to compress a 170050 bytes PNG image file to 152409 bytes (-10.37%). PNGOUT je 141 sekund, da obkladek 170050 bytes PNG slikovne datoteke na 152.409 zlogov (-10,37%).

As you can see, PNGOUT did manage to beat the rest of the PNG compressors like it said but it sure took a lot of time to do it. Kot lahko vidite, PNGOUT uspelo premagati ostale PNG kompresorjev, kot je dejal, vendar je prepričan, da veliko časa, da to storite. AdvancedCOMP did pretty well because it took only 11 seconds to complete the process and it has higher compression than OptiPNG and pngcrush. AdvancedCOMP je kar dobro, saj je le 11 sekund za dokončanje procesa in ima večjo kompresijo kot OptiPNG in pngcrush.

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