# PDFOptimizerCompressImageType Enum

> Specifies the category of images to target during PDF optimization compression.

- Product: Adobe PDF Library 21
- Language: .NET Framework
- Version: APDFL21.0.0PlusP1e
- HTML page: https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/enum/PDFOptimizerCompressImageType
- Version index: https://docs.datalogics.com/apdfl21/DotNetFramework/APDFL21.0.0PlusP1e/llms.txt

**Namespace:** `Datalogics::PDFL`

## Description

Specifies the category of images to target during PDF optimization compression.

## Values

- `PDFOptimizerColor = 1`: Target color images for compression.
- `PDFOptimizerGray = 2`: Target grayscale images for compression.
- `PDFOptimizerMonochrome = 3`: Target monochrome (black and white) images for compression.