---
title: "Search space reduction"
slug: "search-space-reduction"
updated: 2025-06-23T09:17:52Z
published: 2025-06-23T09:17:52Z
canonical: "docs.akridata.ai/search-space-reduction"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.akridata.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Search space reduction

The similarity search is run against all points in a job by default. This can be changed by running a search on a filtered search space based on the catalog filter options in the **Search Space** drop-down, or by setting up the Tunables and Filter parameters. ![](https://cdn.document360.io/3e9d4528-fbc6-4948-a804-8ee7068e7ac3/Images/Documentation/search-space(1).jpg)

You can apply one or more filters, and provide the exact specification of these filters the Selection tab. ![](https://cdn.document360.io/3e9d4528-fbc6-4948-a804-8ee7068e7ac3/Images/Documentation/options-filter-tunable.jpg)

Refer to more details on specifying the filters in [Select and Refine](/data-explorer/docs/select-and-refine).

## Use cases

1. **Tunable:** In a video dataset, a tunable with 'uniform' sampling and a sampling fraction of N can be set as below to reduce search space by removing similar-looking consecutive frames. In this case, the search will be restricted to the selected sampling mode and the specified fraction only.

![](https://cdn.document360.io/3e9d4528-fbc6-4948-a804-8ee7068e7ac3/Images/Documentation/tunable-sampling.jpg)
2. **Catalog filter:** You can restrict the search based on a specific attribute in the catalog (say, the class name) by setting up the catalog filter.

![](https://cdn.document360.io/3e9d4528-fbc6-4948-a804-8ee7068e7ac3/Images/Documentation/catalog-filter.jpg)
3. **Selection panel filters:** The plot view is expected to show the distinct separation of visual characteristics among the different clusters. Let us say there are two clusters formed with daytime and nighttime images. A filter can be specified to choose a particular cluster, and a subsequent search can be set to apply this filter.

![](https://cdn.document360.io/3e9d4528-fbc6-4948-a804-8ee7068e7ac3/Images/Documentation/selection-panel-filter.jpg)