2026-07-08 08:57:50 +00:00

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# ChartQA
## Overview
ChartQA is a benchmark designed to evaluate question-answering capabilities over charts and data visualizations. It tests both visual reasoning and logical understanding of various chart types including bar charts, line graphs, and pie charts.
## Task Description
- **Task Type**: Chart Question Answering
- **Input**: Chart image + natural language question
- **Output**: Single word or numerical answer
- **Domains**: Data visualization, visual reasoning, numerical reasoning
## Key Features
- Covers diverse chart types (bar, line, pie, scatter plots)
- Includes both human-written and augmented test questions
- Requires understanding of chart structure and data relationships
- Tests both visual extraction and logical reasoning abilities
- Questions range from simple data lookup to complex reasoning
## Evaluation Notes
- Default evaluation uses the **test** split with two subsets:
- `human_test`: Human-written questions
- `augmented_test`: Automatically generated questions
- Primary metric: **Relaxed Accuracy** (allows minor variations in answers)
- Answers should be in format "ANSWER: [ANSWER]"
- Numerical answers may have tolerance for rounding differences
## Properties
| Property | Value |
|----------|-------|
| **Benchmark Name** | `chartqa` |
| **Dataset ID** | [lmms-lab/ChartQA](https://modelscope.cn/datasets/lmms-lab/ChartQA/summary) |
| **Paper** | N/A |
| **Tags** | `Knowledge`, `MultiModal`, `QA` |
| **Metrics** | `relaxed_acc` |
| **Default Shots** | 0-shot |
| **Evaluation Split** | `test` |
## Data Statistics
| Metric | Value |
|--------|-------|
| Total Samples | 2,500 |
| Prompt Length (Mean) | 224.33 chars |
| Prompt Length (Min/Max) | 178 / 352 chars |
**Per-Subset Statistics:**
| Subset | Samples | Prompt Mean | Prompt Min | Prompt Max |
|--------|---------|-------------|------------|------------|
| `human_test` | 1,250 | 220.17 | 178 | 352 |
| `augmented_test` | 1,250 | 228.49 | 186 | 293 |
**Image Statistics:**
| Metric | Value |
|--------|-------|
| Total Images | 2,500 |
| Images per Sample | min: 1, max: 1, mean: 1 |
| Resolution Range | 184x326 - 800x1796 |
| Formats | png |
## Sample Example
**Subset**: `human_test`
```json
{
"input": [
{
"id": "c75439e0",
"content": [
{
"text": "\nHow many food item is shown in the bar graph?\n\nThe last line of your response should be of the form \"ANSWER: [ANSWER]\" (without quotes) where [ANSWER] is the a single word answer or number to the problem.\n"
},
{
"image": "[BASE64_IMAGE: png, ~42.9KB]"
}
]
}
],
"target": "14",
"id": 0,
"group_id": 0,
"subset_key": "human_test"
}
```
## Prompt Template
**Prompt Template:**
```text
{question}
The last line of your response should be of the form "ANSWER: [ANSWER]" (without quotes) where [ANSWER] is the a single word answer or number to the problem.
```
## Usage
### Using CLI
```bash
evalscope eval \
--model YOUR_MODEL \
--api-url OPENAI_API_COMPAT_URL \
--api-key EMPTY_TOKEN \
--datasets chartqa \
--limit 10 # Remove this line for formal evaluation
```
### Using Python
```python
from evalscope import run_task
from evalscope.config import TaskConfig
task_cfg = TaskConfig(
model='YOUR_MODEL',
api_url='OPENAI_API_COMPAT_URL',
api_key='EMPTY_TOKEN',
datasets=['chartqa'],
dataset_args={
'chartqa': {
# subset_list: ['human_test', 'augmented_test'] # optional, evaluate specific subsets
}
},
limit=10, # Remove this line for formal evaluation
)
run_task(task_cfg=task_cfg)
```