جودة الصورة والدقة مهمين.

Because Arabic usually leaves out the present-tense verb to be.

So:

• جودة الصورة والدقة مهمين
• literally: the image quality and the resolution important
• natural English: The image quality and the resolution are important

This is very normal in Arabic. In the present tense, nominal sentences often have no written or spoken is/are/am.

It is an iḍāfa construction, often called a possessive or of construction.

• جودة = quality
• الصورة = the image / the picture

So جودة الصورة literally means:

• quality of the image
• or more naturally, image quality

Arabic often expresses this kind of idea by putting two nouns together, instead of using a separate word like of.

Because in an iḍāfa construction, the first noun normally does not take الـ.

So:

• جودة الصورة = the quality of the image
• not الجودة الصورة

The whole phrase is definite because the second noun, الصورة, is definite.

A useful pattern to remember:

• بيت الرجل = the man's house
• جودة الصورة = the image's quality / the quality of the image

The first noun becomes definite through the second noun.

Because جودة ends in ة (tāʾ marbūṭa), and that ة is often pronounced as -t when the word is followed by another word in an iḍāfa construction.

So on its own, جودة may sound like:

• gōda / gawda depending on pronunciation style

But in جودة الصورة, it is commonly pronounced more like:

• gōdet eṣ-ṣūra
• or gawdet eṣ-ṣūra

That -t sound is completely normal here.

Yes, in this context it does.

The basic meaning of دقة is something like:

• accuracy
• precision

But in technology, screens, cameras, and images, الدقة is commonly used for:

• resolution

So in a sentence about pictures, monitors, or video, الدقة is a very natural word for resolution.

مهمين means important here.

The ending -ين is a colloquial plural ending. In Egyptian Arabic, adjectives like مهم often become:

• مهم = important
• مهمين = important, for more than one thing/person

So because the sentence talks about two things:

• جودة الصورة
• الدقة

the adjective appears in a plural form: مهمين.

This is one of the most common things learners notice.

There are two feminine nouns here:

• جودة
• الدقة

But in Egyptian Arabic, everyday speech often uses the plural predicate here rather than a special dual form, and masculine plural is very commonly used as the default agreement form for things.

So مهمين sounds natural in colloquial Egyptian.

If you were aiming for more formal Standard Arabic, you would expect something closer to:

• مهمتان

because there are two feminine items.

So:

• مهمين = normal colloquial Egyptian
• مهمتان = more formal / Standard Arabic style

Because it is the predicate adjective of the sentence, and predicate adjectives are usually indefinite.

So Arabic says:

• جودة الصورة والدقة مهمين
• literally: The image quality and the resolution [are] important

If you said المهمين, that would sound more like:

• the important ones

which is a different idea.

So leaving مهمين without الـ is the normal choice here.

A natural Egyptian pronunciation would be something like:

gōdet eṣ-ṣūra wed-deʔʔa mohimmīn

You may also hear slightly different vowels depending on the speaker, such as gawdet instead of gōdet.

A few useful pronunciation notes:

• ج in Egyptian is usually g, not j
• ق in many Egyptian words is often a glottal stop ʔ
• ال changes sound before sun letters
• so الصورة sounds like eṣ-ṣūra
• and الدقة sounds like ed-deʔʔa
• و before the next word is often pronounced we- or wi-

So the flow is roughly:

gōdet eṣ-ṣūra wed-deʔʔa mohimmīn

It is written in standard Arabic script, but the grammar choice مهمين makes it feel colloquial, including Egyptian-style speech.

A Standard Arabic version would more likely be:

• جودة الصورة والدقة مهمتان

So this sentence is a good example of something that looks very readable to Arabic learners, but reflects spoken colloquial usage rather than strict formal Standard Arabic.